﻿448 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  96 
  

  

  hypopygium 
  elongate 
  and 
  protruding. 
  In 
  the 
  last-mentioned 
  char- 
  

   acter 
  and 
  the 
  anthophagous 
  mouth 
  parts 
  it 
  resembles 
  Agathophiona, 
  

   but 
  whereas 
  in 
  the 
  latter 
  genus 
  it 
  is 
  the 
  labium 
  that 
  is 
  most 
  highly 
  

   developed, 
  in 
  the 
  present 
  genus 
  it 
  is 
  the 
  maxillae 
  and 
  the 
  prolongation 
  

   is 
  much 
  less. 
  Trophophion 
  is 
  most 
  closely 
  related 
  to 
  Genophion 
  Felt, 
  

   from 
  wliich 
  it 
  can 
  be 
  at 
  once 
  distinguished 
  by 
  its 
  long 
  tliin 
  head, 
  

   subclavate 
  antennae, 
  the 
  form 
  of 
  the 
  abdomen, 
  the 
  unusually 
  large 
  

   and 
  coarsely 
  pectinate 
  claws, 
  and 
  by 
  many 
  other 
  characters 
  mentioned 
  

   in 
  the 
  following 
  description. 
  

  

  Head 
  (pi. 
  50, 
  figs. 
  14, 
  20, 
  27): 
  Extremely 
  thin 
  and 
  long, 
  occiput 
  

   deeply 
  concave; 
  temples 
  strongly 
  convex; 
  malar 
  space 
  very 
  long; 
  

   occipital 
  carina 
  fading 
  out 
  below 
  and 
  not 
  reaching 
  hypostomal 
  carina; 
  

   face 
  and 
  clypeus 
  wealdy 
  convex, 
  clypeus 
  broadly 
  truncate; 
  labrum 
  

   semicircularly 
  exposed, 
  maxillae 
  and 
  labium 
  very 
  long, 
  especially 
  the 
  

   galea, 
  palpi 
  unusually 
  short; 
  mandible 
  long 
  and 
  narrow, 
  scarcely 
  nar- 
  

   rowed 
  toward 
  apex, 
  strongly 
  curved, 
  only 
  slightly 
  twisted; 
  eyes 
  

   narrow; 
  ocelli 
  very 
  small, 
  stemmaticum 
  not 
  elevated 
  and 
  not 
  defined 
  

   by 
  a 
  groove; 
  antenna 
  much 
  shorter 
  than 
  body, 
  flagellum 
  slender 
  at 
  

   base, 
  gradually 
  thicker 
  toward 
  apex. 
  

  

  Thorax: 
  Stout; 
  pronotum 
  long 
  and 
  flat 
  medially, 
  with 
  no 
  transverse 
  

   groove; 
  pronotal 
  sinus 
  broad, 
  exposing 
  spiracular 
  sclerite; 
  mesoscutum 
  

   moderately 
  convex, 
  notaulices 
  absent; 
  scutellum 
  evenly 
  convex, 
  mar- 
  

   gined 
  only 
  at 
  base; 
  speculum 
  wealdy 
  defined; 
  prepectus 
  narrow, 
  carina 
  

   obsolete 
  above, 
  postpectus 
  not 
  defined, 
  propodeum 
  very 
  short, 
  apical 
  

   slope 
  precipitous, 
  not 
  at 
  all 
  overlapping 
  hind 
  coxae, 
  median 
  and 
  lateral 
  

   foveae 
  of 
  basal 
  constriction 
  deep 
  and 
  widely 
  separated. 
  Wings 
  with 
  

   coarse 
  veins 
  and 
  dense, 
  short 
  discal 
  ciliation, 
  a 
  small 
  hairless 
  area 
  

   below 
  base 
  of 
  stigma; 
  stigma 
  narrowly 
  triangular, 
  with 
  radius 
  at 
  

   basal 
  third; 
  basal 
  abscissa 
  of 
  radius 
  tliickened 
  and 
  curved 
  at 
  base, 
  

   apical 
  abscissa 
  straight; 
  second 
  discoidal 
  cell 
  short 
  and 
  broad, 
  lower 
  

   apical 
  angle 
  acute, 
  discocubitus 
  strongly 
  curved; 
  frenulum 
  with 
  6 
  or 
  7 
  

   hooks; 
  abscissula 
  rather 
  wealdy 
  curved 
  at 
  base; 
  nerveUus 
  broken 
  

   above 
  middle, 
  upper 
  abscissa 
  perpendicular 
  to 
  mediella. 
  Legs 
  very 
  

   stout 
  and 
  short; 
  apical 
  tarsal 
  joints 
  long, 
  claws 
  (pi. 
  55, 
  fig. 
  78) 
  long 
  

   and 
  coarsely 
  pectinate, 
  with 
  few 
  teeth. 
  

  

  Abdomen 
  (pi. 
  56, 
  fig. 
  99): 
  Wealdy 
  compressed; 
  tergite 
  1 
  decurved; 
  

   tergite 
  2 
  with 
  umbo 
  short 
  and 
  rather 
  wealdy 
  defined, 
  spiracles 
  at 
  

   middle; 
  apical 
  tergites 
  in 
  female 
  deeply 
  emarginate 
  medially; 
  hypo- 
  

   pygium 
  in 
  female 
  very 
  long 
  and 
  protrudmg, 
  ovipositor 
  when 
  sheathed 
  

   pointing 
  dorsocephalad. 
  

  

  Genotype.— 
  Trophophion 
  tenuiceps, 
  new 
  species. 
  

  

  