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<PAGE> PAGE 2
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<PAGE> PAGE 3
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<PAGE> PAGE 5
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<PAGE> PAGE 7
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<PAGE> PAGE 8
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<PAGE> PAGE 9
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<PAGE> PAGE 10
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 14
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 17
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<PAGE> PAGE 18
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<PAGE> PAGE 19
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<PAGE> PAGE 20
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<PAGE> PAGE 21
048 G020400 0.000
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050 000400 N
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056 000400 Y
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<PAGE> PAGE 22
070 C010400 Y
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070 H020400 N
070 I010400 N
070 I020400 N
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070 J020400 Y
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070 K020400 N
070 L010400 N
070 L020400 N
070 M010400 N
070 M020400 N
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070 N020400 N
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<PAGE> PAGE 23
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<PAGE> PAGE 24
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<PAGE> PAGE 25
042 G000500 0
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<PAGE> PAGE 26
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<PAGE> PAGE 27
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<PAGE> PAGE 28
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<PAGE> PAGE 29
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<PAGE> PAGE 30
049 000600 N
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<PAGE> PAGE 31
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<PAGE> PAGE 32
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<PAGE> PAGE 33
028 B010700 620
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<PAGE> PAGE 34
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<PAGE> PAGE 35
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<PAGE> PAGE 36
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<PAGE> PAGE 37
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<PAGE> PAGE 38
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<PAGE> PAGE 39
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<PAGE> PAGE 40
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<PAGE> PAGE 41
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074 L001100 2068
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<PAGE> PAGE 42
028 D021300 245
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028 G011300 3505
028 G021300 1987
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<PAGE> PAGE 43
048 E021300 0.000
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048 I011300 0
048 I021300 0.000
048 J011300 0
048 J021300 0.000
048 K011300 0
048 K021300 0.000
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050 001300 N
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<PAGE> PAGE 44
070 A011300 N
070 A021300 N
070 B011300 N
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070 E021300 Y
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070 F021300 N
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070 H011300 N
070 H021300 N
070 I011300 N
070 I021300 N
070 J011300 Y
070 J021300 N
070 K011300 N
070 K021300 N
070 L011300 N
070 L021300 N
070 M011300 N
070 M021300 N
070 N011300 N
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<PAGE> PAGE 45
072 L001300 7
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<PAGE> PAGE 46
074 V011300 10.11
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<PAGE> PAGE 47
042 C001400 29
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<PAGE> PAGE 48
062 B001400 0.0
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<PAGE> PAGE 49
070 P011400 Y
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<PAGE> PAGE 50
074 E001400 0
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<PAGE> PAGE 51
028 F031500 0
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<PAGE> PAGE 52
048 J011500 0
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<PAGE> PAGE 53
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<PAGE> PAGE 54
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<PAGE> PAGE 55
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<PAGE> PAGE 56
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<PAGE> PAGE 57
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<PAGE> PAGE 58
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<PAGE> PAGE 59
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<PAGE> PAGE 60
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<PAGE> PAGE 61
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063 B001800 16.1
064 A001800 Y
064 B001800 N
070 A011800 Y
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070 B021800 N
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070 C021800 N
070 D011800 N
070 D021800 N
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070 E021800 Y
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<PAGE> PAGE 62
070 J011800 Y
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070 K011800 N
070 K021800 N
070 L011800 N
070 L021800 N
070 M011800 N
070 M021800 N
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<PAGE> PAGE 63
072CC021800 4987
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028 B022100 105
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<PAGE> PAGE 64
028 C032100 0
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<PAGE> PAGE 65
048 D012100 0
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048 I022100 0.000
048 J012100 0
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048 K022100 0.000
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050 002100 N
051 002100 N
052 002100 N
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055 A002100 N
055 B002100 N
056 002100 Y
057 002100 N
058 A002100 N
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060 A002100 N
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<PAGE> PAGE 66
063 B002100 13.8
064 A002100 Y
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070 A012100 Y
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070 D022100 N
070 E012100 Y
070 E022100 Y
070 F012100 N
070 F022100 N
070 G012100 Y
070 G022100 N
070 H012100 N
070 H022100 N
070 I012100 N
070 I022100 N
070 J012100 Y
070 J022100 Y
070 K012100 N
070 K022100 N
070 L012100 N
070 L022100 N
070 M012100 N
070 M022100 N
070 N012100 N
070 N022100 N
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070 O022100 N
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<PAGE> PAGE 67
072 I002100 45
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<PAGE> PAGE 68
074 T002100 42990
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031 B002200 0
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<PAGE> PAGE 69
036 B002200 0
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048 I012200 0
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048 K022200 0.000
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050 002200 N
051 002200 N
052 002200 N
053 A002200 Y
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055 A002200 N
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058 A002200 N
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<PAGE> PAGE 70
060 B002200 N
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070 H012200 N
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070 I022200 N
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<PAGE> PAGE 71
070 N022200 N
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<PAGE> PAGE 72
074 B002200 0
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<PAGE> PAGE 73
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<PAGE> PAGE 74
048 H022300 0.000
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<PAGE> PAGE 75
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<PAGE> PAGE 76
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<PAGE> PAGE 77
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<PAGE> PAGE 78
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<PAGE> PAGE 79
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<PAGE> PAGE 80
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<PAGE> PAGE 81
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<PAGE> PAGE 82
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<PAGE> PAGE 83
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<PAGE> PAGE 84
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<PAGE> PAGE 85
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<PAGE> PAGE 86
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SIGNATURE ELLEN MOYNIHAN
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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<NAME> MFS MUNICIPAL SERIES TRUST
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
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<CIK> 0000751656
<NAME> MFS MUNICIPAL SERIES TRUST
<SERIES>
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<NAME> MFS NEW YORK HIGH INCOME TAX FREE FUND CLASS A
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INDEPENDENT AUDITORS' REPORT
To the Trustees and Shareholders of MFS Municipal Series Trust:
In planning and performing our audits of the financial statements of MFS
Municipal Series Trust (comprised of MFS Municipal Income Fund, MFS Alabama
Municipal Bond Fund, MFS Arkansas Municipal Bond Fund, MFS California Municipal
Bond Fund, MFS Florida Municipal Bond Fund, MFS Georgia Municipal Bond Fund, MFS
Maryland Municipal Bond Fund, MFS Massachusetts Municipal Bond Fund, MFS
Mississippi Municipal Bond Fund, MFS New York Municipal Bond Fund, MFS North
Carolina Municipal Bond Fund, MFS Pennsylvania Municipal Bond Fund, MFS South
Carolina Municipal Bond Fund, MFS Tennessee Municipal Bond Fund, MFS Virginia
Municipal Bond Fund, MFS West Virginia Municipal Bond Fund, MFS Massachusetts
High Income Tax Free Fund and MFS New York High Income Tax Free Fund) (the
"Trust") for the year ended March 31, 2000 (on which we have issued our reports
dated May 4, 2000), we considered its internal control, including control
activities for safeguarding securities, in order to determine our auditing
procedures for the purpose of expressing our opinions on the financial
statements and to comply with the requirements of Form N-SAR, and not to provide
assurance on the Trust's internal control.
The management of the Trust is responsible for establishing and maintaining
internal control. In fulfilling this responsibility, estimates and judgments by
management are required to assess the expected benefits and related costs of
controls. Generally, controls that are relevant to an audit pertain to the
entity's objective of preparing financial statements for external purposes that
are fairly presented in conformity with generally accepted accounting
principles. Those controls include the safeguarding of assets against
unauthorized acquisition, use or disposition.
Because of inherent limitations in any internal control, misstatements due to
error or fraud may occur and not be detected. Also, projections of any
evaluation of internal control to future periods is subject to the risk that the
internal control may become inadequate because of changes in conditions or that
the degree of compliance with policies or procedures deteriorates.
Our consideration of the Trust's internal control would not necessarily disclose
all matters in internal control that might be material weaknesses under
standards established by the American Institute of Certified Public Accountants.
A material weakness is a condition in which the design or operation of one or
more of the internal control components does not reduce to a relatively low
level the risk that misstatements caused by error or fraud in amounts that would
be material in relation to the financial statements being audited may occur and
not be detected within a timely period by employees in the normal course of
performing their assigned functions. However, we noted no matters involving the
Trust's internal control and its operation, including controls for safeguarding
securities that we consider to be material weaknesses as defined above as of
March 31, 2000.
This report is intended solely for the information and use of management, the
Trustees and Shareholders of MFS Municipal Series Trust, and the Securities and
Exchange Commission and is not intended to be and should not be used by anyone
other than these specified parties.
DELOITTE & TOUCHE LLP
Boston, Massachusetts
May 4, 2000
39952
SUB-ITEM 77-H
As of March 31, 2000, Donald F. Pitcher and Shirley H. Pitcher, JTWROS, Hingham,
Massachusetts, no longer owned more than 25% of MFS Massachusetts High Income
Tax Free Fund, a series of MFS Municipal Series Trust, and therefore ceased to
be controlling persons of the Fund.
