﻿558 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  AIUSEUM 
  vol. 
  io3 
  

  

  Curran) 
  by 
  the 
  absence, 
  in 
  the 
  former, 
  of 
  a 
  break 
  in 
  the 
  costa 
  just 
  

   before 
  the 
  apex 
  of 
  the 
  first 
  vein. 
  In 
  Cyamops 
  there 
  is 
  no 
  actual 
  

   break 
  here, 
  but 
  there 
  is 
  a 
  definite 
  weakening 
  of 
  the 
  vein, 
  differing, 
  so 
  

   far 
  as 
  I 
  can 
  see, 
  in 
  no 
  way 
  from 
  that 
  found 
  in 
  Mumetopia. 
  

  

  I 
  have 
  examined 
  the 
  internal 
  female 
  genitalia 
  in 
  Cyamops 
  nehulosa 
  

   Melander. 
  There 
  are 
  three 
  chitinized 
  spherical 
  spermathecae, 
  of 
  

   which 
  two 
  are 
  attached 
  to 
  a 
  common 
  duct. 
  The 
  two 
  spirally 
  thick- 
  

   ened 
  ducts 
  open 
  into 
  a 
  large 
  weakly 
  chitinized 
  pouch 
  that 
  arises 
  from 
  

   the 
  dorsal 
  surface 
  of 
  the 
  uterus, 
  thus 
  somewhat 
  suggesting 
  the 
  single 
  

   common 
  duct 
  found 
  in 
  Pemce^^s. 
  There 
  are 
  two 
  parovaria; 
  no 
  sperm 
  

   or 
  ventral 
  receptacle 
  was 
  found. 
  The 
  other 
  known 
  Anthomyzidae 
  

   (Anthomyza, 
  Ischnomyia, 
  and 
  Mumetopia) 
  differ 
  in 
  having 
  only 
  two 
  

   spermathecae 
  and 
  no 
  dorsal 
  uterine 
  pouch. 
  The 
  eggs 
  of 
  C. 
  nehulosa 
  

   are 
  also 
  unusual 
  in 
  that 
  they 
  have 
  two 
  short, 
  thick, 
  anterodorsal 
  

   filaments 
  suggestive 
  of 
  those 
  found 
  in 
  Drosophila 
  or 
  Parallelomma. 
  

   The 
  eggs 
  are 
  white 
  rather 
  than 
  dark 
  blackish 
  brown 
  as 
  in 
  Periscelis. 
  

  

  Since 
  the 
  genus 
  may 
  be 
  looked 
  for 
  under 
  the 
  Periscelidae, 
  and 
  since 
  

   I 
  have 
  available 
  a 
  new 
  species 
  and 
  new 
  data 
  on 
  the 
  one 
  previously 
  

   described 
  species, 
  a 
  synopsis 
  is 
  given 
  here. 
  

  

  Key 
  to 
  the 
  species 
  of 
  Cyamops 
  

  

  1. 
  First 
  tibiae 
  and 
  tarsi 
  yellow, 
  darkened 
  only 
  on 
  terminal 
  tarsal 
  segment; 
  second 
  

   section 
  of 
  costa 
  at 
  least 
  twice 
  length 
  of 
  third 
  section; 
  two 
  pairs 
  of 
  scutellar 
  

  

  bristles 
  C. 
  nebulosa 
  Melander 
  

  

  First 
  tibiae 
  and 
  tarsi 
  largely 
  black; 
  second 
  and 
  third 
  costal 
  sections 
  nearly 
  

   equal 
  in 
  length; 
  one 
  pair 
  of 
  scutellar 
  bristles 
  C. 
  imitata, 
  new 
  species 
  

  

  Cyamops 
  nebulosa 
  Melander, 
  1913 
  

  

  I 
  have 
  examined 
  43 
  specimens 
  from 
  Middleboro, 
  Rochester, 
  

   Mashpee, 
  and 
  Woods 
  Hole, 
  Mass., 
  and 
  Dismal 
  Swamp 
  (Cornell 
  

   University 
  collection) 
  and 
  Lake 
  Drummond 
  (H. 
  S. 
  Barber), 
  Va. 
  

   Specimens 
  from 
  Woods 
  Hole 
  (the 
  type 
  locality) 
  are 
  in 
  the 
  U. 
  S. 
  

   National 
  Museum. 
  The 
  species 
  is 
  recorded 
  by 
  Johnson 
  (1925) 
  from 
  

   Salisbury 
  Cove, 
  Maine, 
  and 
  Wobm-n, 
  Mass. 
  Mr. 
  Sabrosky 
  informs 
  

   me 
  that 
  there 
  are 
  specimens 
  in 
  the 
  U. 
  S. 
  National 
  Museum 
  from 
  

   Beltsville 
  and 
  from 
  near 
  Lloyds 
  (Dorchester 
  County), 
  Md., 
  Alex- 
  

   andria, 
  Va. 
  (bred 
  May 
  20, 
  1951, 
  from 
  pupae 
  collected 
  by 
  W. 
  W. 
  

   Wirth 
  in 
  osmundine 
  bog). 
  La 
  Fayette, 
  Ind., 
  and 
  Jacksonville, 
  Fla. 
  

  

  The 
  original 
  description 
  was 
  based 
  on 
  a 
  male; 
  the 
  female 
  differs 
  in 
  

   having 
  a 
  distinctly 
  broader 
  face. 
  

  

  In 
  eastern 
  Massachusetts 
  I 
  have 
  found 
  the 
  species 
  easy 
  to 
  collect 
  

   from 
  Jime 
  to 
  the 
  end 
  of 
  August 
  by 
  sweeping 
  around 
  the 
  edges 
  of 
  

   shady 
  sphagnum 
  bogs. 
  Of 
  the 
  40 
  specimens 
  so 
  collected 
  in 
  this 
  

   region, 
  16 
  (of 
  both 
  sexes) 
  have 
  no 
  dark 
  pattern 
  on 
  the 
  wings. 
  I 
  had 
  

   supposed 
  these 
  represented 
  a 
  distinct 
  species, 
  since 
  their 
  body 
  color 
  

  

  