﻿THE 
  PHORID 
  FLIES 
  OF 
  GUAM 
  — 
  BOHART 
  399 
  

  

  what 
  loiijier 
  than 
  the 
  others 
  along 
  the 
  same 
  row; 
  ventral 
  margin 
  of 
  

   posterior 
  femora 
  with 
  about 
  four 
  basal 
  haii-s, 
  much 
  longer 
  than 
  any 
  

   toward 
  the 
  apex. 
  Wings: 
  ^Membrane 
  lightly 
  infuscated, 
  costal 
  bris- 
  

   tles 
  long 
  and 
  sparse"; 
  wings 
  otherwise 
  bare 
  except 
  for 
  a 
  few 
  bristles 
  

   basally 
  on 
  posterior 
  margin; 
  veins 
  placed 
  as 
  shown 
  in 
  figure 
  38. 
  

   Abdomen: 
  Tergites 
  ahnost 
  uniformly 
  brown, 
  slightly 
  paler 
  basally 
  

   and 
  medially 
  and 
  very 
  sparsely 
  pubescent, 
  the 
  hairs 
  mostly 
  in 
  patches 
  

   laterally 
  and 
  along 
  posterior 
  margins; 
  genitalia 
  small, 
  the 
  apical 
  

   lamella 
  divided 
  into 
  two 
  parts, 
  the 
  upper 
  part 
  with 
  scattered 
  hairs 
  as 
  

   long 
  as 
  the 
  pair 
  of 
  terminal 
  bristles 
  on 
  the 
  lower 
  part. 
  

  

  Holotype 
  (unique) 
  (U. 
  S. 
  N. 
  M. 
  No. 
  57990) 
  : 
  Pago 
  River 
  Valley, 
  

   Guam, 
  June 
  1945, 
  swept 
  from 
  dense 
  jungle 
  vegetation 
  on 
  a 
  steep 
  si 
  )pe 
  

   (G. 
  E. 
  Bohart). 
  

  

  Remarks. 
  — 
  This 
  species 
  is 
  similar 
  in 
  coloration 
  and 
  costal 
  fringe 
  of 
  

   the 
  wing 
  to 
  paraha>iiseta 
  but 
  lacks 
  mesopleural 
  bristles 
  and 
  any 
  

   bristles 
  on 
  the 
  third 
  longitudinal 
  vein. 
  It 
  runs 
  close 
  to 
  equiseta 
  

   Brues 
  and 
  luiisctosa 
  Brues 
  in 
  his 
  key 
  to 
  the 
  Philippine 
  species 
  (1936) 
  

   but 
  differs 
  from 
  the 
  former 
  in 
  having 
  lighter 
  color, 
  longer 
  and 
  sparser 
  

   costal 
  :wing 
  fringe, 
  and 
  shorter 
  frontal 
  bristles. 
  It 
  diflfers 
  from 
  

   nnisttosa 
  in 
  lacking 
  a 
  bristle 
  on 
  the 
  base 
  of 
  the 
  radial 
  sector 
  vein 
  and 
  

   having 
  four 
  bristles 
  on 
  the 
  posterior 
  scutal 
  margin. 
  It 
  runs 
  to 
  couplet 
  

   55 
  in 
  Malloch's 
  key 
  to 
  the 
  Megaselia 
  in 
  the 
  U. 
  S. 
  National 
  Museum 
  

   (1912) 
  but 
  differs 
  from 
  either 
  conspicualis 
  Malloch 
  or 
  inornata 
  Mal- 
  

   loch 
  by 
  having 
  a 
  normal 
  costa 
  and 
  brown 
  halteres. 
  The 
  male 
  geni- 
  

   talia 
  and 
  basal 
  ventral 
  hairs 
  of 
  the 
  hind 
  femora 
  will 
  probably 
  serve 
  to 
  

   characterize 
  this 
  species. 
  

  

  MEGASELIA 
  SUIS, 
  new 
  Hpeciei 
  

   i'^OUBE 
  36 
  

  

  Uolotype^ 
  male. 
  — 
  Length 
  1.5 
  mm.; 
  length 
  of 
  wing 
  1.4 
  mm.; 
  body 
  

   yellow; 
  frons 
  somewhat 
  darkened 
  above; 
  scutum 
  testaceous; 
  abdomen 
  

   yellow, 
  with 
  fourth 
  tcrgitc 
  dark 
  except 
  vontrally, 
  second 
  and 
  tiiird 
  

   tergites 
  dark 
  apically 
  and 
  laterally; 
  genitalia 
  dark 
  basally; 
  hind 
  

   femora 
  strongly 
  darkened 
  apically; 
  wings 
  almost 
  hyaline. 
  Head: 
  

   Frontal 
  bristles 
  excei)tiomilly 
  long 
  and 
  slender; 
  antialos 
  as 
  close 
  to 
  

   j-uj)ra-antennals 
  as 
  to 
  lower 
  frontals; 
  inner 
  supra-antennals 
  only 
  half 
  

   as 
  long 
  as 
  outer; 
  antennal 
  arista 
  no 
  longer 
  than 
  head 
  height; 
  palpi 
  

   with 
  weak 
  bristles 
  basally 
  in 
  addition 
  to 
  four 
  outwardly 
  directed 
  

   apical 
  or 
  sui)apical 
  ones 
  and 
  an 
  inwardly 
  directed 
  one; 
  genal 
  angles 
  

   with 
  two 
  strong 
  l)ristles. 
  Thorax: 
  Dorsal 
  pulx-srence 
  short 
  and 
  close, 
  

   becoming 
  bristly 
  posteriorly; 
  posterior 
  scutal 
  margin 
  with 
  a 
  pair 
  of 
  

   inner 
  bristles 
  over 
  half 
  as 
  long 
  as 
  the 
  usual 
  outer 
  rmes; 
  bristles 
  along 
  

   outer 
  margin 
  of 
  scutum 
  as 
  long 
  as 
  free 
  end 
  of 
  K,.l. 
  ; 
  scutcllum 
  with 
  a 
  

   pair 
  of 
  long 
  posterior 
  bristles 
  and 
  a 
  pair 
  of 
  very 
  reduced 
  hairlike 
  ones 
  

  

  