﻿226 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  shorter; 
  fourth 
  slender, 
  almost 
  linear 
  and 
  equal 
  in 
  length 
  to 
  the 
  second; 
  

   each 
  with 
  a 
  few 
  scattering 
  long 
  setae 
  and 
  numerous 
  small 
  ones 
  having 
  a 
  

   more 
  or 
  less 
  verticillate 
  arrangement. 
  

  

  Thorax 
  with 
  a 
  few 
  longer 
  setae 
  and 
  a 
  number 
  of 
  shorter 
  ones 
  which 
  

   show 
  traces 
  of 
  being 
  arranged 
  in 
  three 
  longitudinal 
  rows 
  on 
  the 
  scutum 
  

   of 
  the 
  mesothorax. 
  

  

  Wings: 
  subcosta 
  (ist 
  longitudinal) 
  short; 
  first 
  branch 
  of 
  radius 
  (2nd 
  

   longitudinal) 
  joined 
  to 
  the 
  second 
  branch 
  (3d 
  longitudinal) 
  at 
  two-thirds 
  

   its 
  length 
  by 
  the 
  short 
  cross-vein 
  and 
  uniting 
  with 
  costa 
  about 
  the 
  

   middle 
  of 
  the 
  wing, 
  some 
  httle 
  distance 
  before 
  the 
  fork 
  of 
  media 
  (4th 
  

   and 
  5th 
  longitudinals). 
  Second 
  branch 
  of 
  media 
  (5th 
  longitudinal) 
  

   nearer 
  the 
  apex 
  of 
  the 
  wing 
  than 
  the 
  tip 
  of 
  the 
  second 
  branch 
  of 
  radius. 
  

   The 
  distance 
  between 
  the 
  two 
  branches 
  of 
  cubitus 
  (6th 
  and 
  7th 
  longi- 
  

   tudinals) 
  along 
  the 
  margin 
  of 
  the 
  wing 
  is 
  greater 
  than 
  between 
  the 
  second 
  

   branch 
  of 
  media 
  and 
  the 
  first 
  branch 
  of 
  cubitus. 
  The 
  anal 
  vein 
  (8th 
  

   longitudinal) 
  about 
  half 
  the 
  length 
  of 
  the 
  second 
  branch 
  of 
  cubitus 
  

   (PL 
  VI, 
  figs. 
  5, 
  6). 
  

  

  Fore 
  coxa 
  a 
  little 
  over 
  half 
  the 
  length 
  of 
  either 
  femur 
  or 
  tibia 
  ; 
  tarsi 
  

   one-fourth 
  longer 
  than 
  tibia, 
  first 
  tarsal 
  segment 
  shorter 
  than 
  the 
  remain- 
  

   ing 
  four 
  ; 
  segments 
  of 
  the 
  middle 
  pair 
  of 
  legs 
  a 
  little 
  longer 
  than 
  in 
  the 
  

   first, 
  those 
  of 
  the 
  posterior 
  pair 
  still 
  longer, 
  the 
  first 
  tarsal 
  segment 
  nearly- 
  

   equal 
  to 
  the 
  remaining 
  ones. 
  

  

  Abdomen 
  of 
  both 
  sexes 
  sparsely 
  clothed 
  with 
  fine 
  setae. 
  The 
  female 
  

   abdomen 
  enlarges 
  gradually 
  to 
  the 
  fourth 
  segment 
  and 
  then 
  tapers 
  to 
  

   the 
  slender 
  ovipositor. 
  Terminal 
  portion 
  of 
  the 
  genital 
  plate 
  elliptical. 
  

  

  Abdomen 
  of 
  the 
  male 
  nearly 
  cylindrical. 
  Terminal 
  segment 
  some- 
  

   what 
  enlarged 
  ; 
  claspers 
  curved, 
  each 
  armed 
  with 
  an 
  apical 
  curved 
  spine 
  

   and 
  with 
  numerous 
  stout 
  ones 
  along 
  the 
  inner 
  margin. 
  Near 
  the 
  basal 
  

   third 
  of 
  the 
  clasper 
  there 
  is 
  a 
  very 
  long 
  seta 
  on 
  its 
  inner 
  margin, 
  extend- 
  

   ing 
  nearly 
  to 
  the 
  median 
  line. 
  There 
  are 
  also 
  a 
  pair 
  of 
  long 
  stout 
  setae, 
  

   a 
  dorsal 
  and 
  a 
  ventral 
  one, 
  at 
  the 
  base 
  of 
  each 
  clasper 
  (PI, 
  VI, 
  fig. 
  10). 
  

  

  Length: 
  Male, 
  body, 
  2.5 
  mm., 
  wing, 
  2.25 
  mm.; 
  female, 
  body, 
  3 
  mm., 
  

   wing, 
  2.5 
  mm. 
  

  

  The 
  following 
  species 
  was 
  quite 
  common 
  in 
  the 
  greenhouse 
  of 
  Mr. 
  J. 
  

  

  A. 
  Otterson, 
  Berlin, 
  Mass., 
  and 
  in 
  others 
  in 
  the 
  vicinity. 
  During 
  the 
  

  

  winter 
  the 
  flies 
  were 
  more 
  or 
  less 
  abundant, 
  and 
  their 
  larvae 
  could 
  be 
  

  

  found 
  in 
  the 
  soil. 
  Under 
  the 
  influence 
  of 
  the 
  higher 
  temperature 
  of 
  the 
  

  

  early 
  spring 
  the 
  flies 
  became 
  very 
  abundant. 
  As 
  giving 
  an 
  idea 
  of 
  their 
  

  

  prolificacy, 
  it 
  may 
  be 
  interesting 
  to 
  note 
  that 
  over 
  625 
  eggs 
  were 
  found 
  

  

  in 
  the 
  distended 
  abdomen 
  of 
  a 
  female. 
  In 
  this 
  dissection 
  no 
  count 
  was 
  

  

  made 
  of 
  a 
  number 
  (estimated 
  at 
  approximately 
  200) 
  of 
  what 
  appeared 
  

  

  to 
  be 
  partly 
  developed 
  eggs. 
  This 
  species, 
  described 
  below, 
  is 
  closely 
  

  

  related 
  to 
  Sciara 
  obscura 
  Winnertz. 
  

  

  SciARA 
  PROLiFiCA 
  n. 
  sp. 
  Female. 
  Head 
  and 
  thorax 
  dull 
  black 
  ; 
  

   abdomen 
  brownish 
  black, 
  posterior 
  margins 
  'of 
  4th 
  to 
  6th 
  segments, 
  

   occasionally 
  others, 
  bordered 
  with 
  yellowish 
  white; 
  ventrally 
  the 
  abdo- 
  

   men 
  is 
  lighter 
  and 
  frequently 
  its 
  yellowish 
  contents 
  show 
  through 
  the 
  

   distended 
  lateral 
  membranes. 
  Antennae 
  and 
  palpi 
  nearly 
  black, 
  the 
  

   former 
  with 
  a 
  short 
  whitish 
  pubescence. 
  Wings 
  somewhat 
  iridescent, 
  

  

  