﻿THE 
  PHORID 
  FLIES 
  OF 
  GUAM 
  — 
  BOHART 
  415 
  

  

  Ilolotype 
  (U. 
  S. 
  X. 
  M. 
  No. 
  57993) 
  and 
  15 
  female 
  paratypes: 
  Point 
  

   0>"i, 
  A^'ana, 
  Guam, 
  Juno 
  1945, 
  reared 
  from 
  decaying 
  mollusks 
  buried 
  

   in 
  ant 
  colonies 
  just 
  beneath 
  the 
  ground 
  surface 
  (G. 
  E. 
  Bohart 
  and 
  

   J.L. 
  Gressitt). 
  

  

  /Remarks. 
  — 
  This 
  fly 
  is 
  so 
  distinctive 
  that 
  a 
  new 
  genus 
  was 
  erected 
  

   for 
  it. 
  Other 
  species, 
  if 
  found, 
  may 
  show 
  that 
  some 
  of 
  the 
  characters 
  

   used 
  in 
  the 
  generic 
  description 
  are 
  of 
  specific 
  vahie 
  only. 
  

  

  Ah 
  hough 
  over 
  30 
  specimens 
  were 
  reared, 
  no 
  males 
  were 
  obtained. 
  

  

  KKY 
  TO 
  TIIK 
  rilORIDAE 
  OF 
  GUAM 
  

  

  1. 
  Winpless 
  2 
  

  

  Winged 
  5 
  

  

  2. 
  Head 
  strongly 
  flattened 
  dorsoventrally 
  and 
  with 
  front 
  produced 
  beyond 
  

  

  antennae; 
  d'Tsum 
  of 
  thorax 
  without 
  strong 
  bristles; 
  eye 
  smaller 
  than 
  

  

  antenna. 
  (Chorioccphalus) 
  3 
  

  

  Head 
  neither 
  flattened 
  nor 
  conspicuously 
  produced; 
  dorsum 
  of 
  thorax 
  

   with 
  several 
  pairs 
  of 
  strong 
  bristles; 
  eye 
  larger 
  than 
  third 
  antennal 
  

   segment. 
  (PuUciphora) 
  4 
  

  

  3. 
  Abdomen, 
  view 
  from 
  side, 
  with 
  tergites 
  uniformly 
  haired 
  and 
  without 
  

  

  distinct 
  apical 
  fringes; 
  venter 
  of 
  abdomen 
  light 
  brown, 
  almost 
  as 
  dark 
  

  

  as 
  dorsum 
  Chonocephalus 
  hirsutus 
  

  

  Abdomen 
  with 
  very 
  fine 
  sparse 
  hairs 
  except 
  for 
  apical 
  fringes 
  of 
  tergites; 
  

  

  blackish 
  dorsum 
  of 
  abdomen 
  contrasting 
  strongly 
  with 
  creamy 
  white 
  

   venter 
  Chonocephalus 
  subglaber 
  

  

  4. 
  Frons, 
  mesonotum, 
  and 
  first 
  5 
  abdominal 
  tergites 
  uniformly 
  blackish; 
  

  

  thoracic 
  pleurnn 
  strongly 
  marked 
  with 
  dark 
  gray 
  along 
  most 
  sutures; 
  

   hind 
  tibia 
  without 
  noticeable 
  fringe 
  of 
  bristles 
  or 
  stiff 
  hairs; 
  fifth 
  

   abdominal 
  segment 
  not 
  uniformly 
  ringed 
  with 
  several 
  rows 
  of 
  hairs 
  or 
  

  

  short 
  bristles 
  Puliciphora 
  nigriventris 
  

  

  Most 
  of 
  frons 
  and 
  much 
  of 
  mesonotum 
  and 
  abdominal 
  tergites 
  testaceous 
  

   to 
  bnnvti, 
  not 
  strongly 
  different 
  from 
  thoracic 
  pleural 
  color; 
  fifth 
  and 
  

   sixth 
  abdominul 
  si-gments 
  uniformly 
  ringed 
  with 
  short 
  bristles 
  or 
  hairs; 
  

   hind 
  tibia 
  with 
  distinct 
  posterior 
  fringe 
  of 
  strong 
  hairs 
  or 
  bristles. 
  

  

  Puliciphora 
  wymani 
  

  

  5. 
  Frons 
  covered 
  with 
  long, 
  strong 
  bristles 
  and 
  not 
  produced 
  forward 
  be- 
  

  

  tween 
  antennal 
  bases 
  7 
  

  

  Frons 
  with 
  iit 
  most 
  2 
  or 
  ?, 
  pairs 
  of 
  strong 
  bristles 
  and 
  produced 
  forward 
  

   between 
  antennal 
  bases. 
  (Chonocephalus) 
  6 
  

  

  6. 
  Frons 
  broadly 
  imprfs.sfd 
  mfdinlly, 
  fmni 
  above 
  appearing 
  like 
  a 
  pair 
  of 
  

  

  ridgt-s 
  b<?tween 
  antcimal 
  ba.sfs, 
  and 
  with 
  anterior 
  border 
  near 
  eyes 
  

   having 
  a 
  series 
  of 
  3 
  or 
  4 
  moderate 
  bristles; 
  me.soijlcuroti 
  with 
  several 
  

  

  setae 
  Chonocephalus 
  subglaber 
  

  

  Frons 
  narrowly 
  impressed 
  along 
  midline 
  and 
  with 
  bristles 
  along 
  anterior 
  

   border 
  scattered 
  and 
  weak; 
  me.sopleuron 
  wltli 
  a 
  single 
  seta. 
  

  

  Chonocephalus 
  hirsutus 
  

  

  7. 
  Radial 
  sector 
  unliranehed 
  8 
  

  

  Radial 
  sector 
  branclied 
  near 
  ajM'x 
  10 
  

  

  8. 
  Clyp<'us 
  strongly 
  produeefj 
  forward 
  at 
  oral 
  margin; 
  hind 
  tibia 
  with 
  a 
  

  

  spine 
  on 
  outer 
  surface 
  toward 
  the 
  base; 
  midtihiu 
  wlili 
  a 
  pair 
  of 
  bristles 
  

  

  ffiward 
  ba.se 
  Parafannia 
  molluscovora 
  

  

  Clypetis 
  not 
  prfKlurrd 
  at 
  oral 
  margin; 
  tibiae 
  without 
  basal 
  or 
  sub-basal 
  

   bristles. 
  {Puliciphora) 
  

  

  