﻿art. 
  23 
  NEW 
  AMERICAN 
  ICHNEUMON-FLIES 
  CUSIIMAN 
  ( 
  

  

  BRACHYCRYPTUS 
  NIGER, 
  new 
  species 
  

  

  Female. 
  — 
  Length 
  7.5 
  mm.; 
  antennae 
  5 
  mm. 
  

  

  Temples 
  very 
  strongly 
  narrowed, 
  slightly 
  convex, 
  sparsely 
  and 
  

   finely 
  punctate, 
  polished; 
  eyes 
  very 
  large, 
  bulging, 
  convergent 
  below; 
  

   face 
  about 
  two-thirds 
  as 
  broad 
  as 
  top 
  of 
  frons, 
  opaque, 
  finely 
  and 
  

   densely 
  punctate; 
  clypeus 
  more 
  coarsely 
  sculptured 
  than 
  the 
  face, 
  

   transversely 
  rugoso-punctate, 
  very 
  narrowly 
  margined 
  and 
  arcuate 
  

   at 
  apex; 
  malar 
  space 
  slightly 
  more 
  than 
  half 
  as 
  long 
  as 
  basal 
  width 
  

   of 
  mandible; 
  upper 
  tooth 
  of 
  mandible 
  slightly 
  longer 
  than 
  lower; 
  

   frons 
  opaque 
  laterally, 
  shinging 
  medially, 
  with 
  distinct 
  polished 
  

   scrobes; 
  ocelli 
  small, 
  the 
  diameter 
  of 
  a 
  lateral 
  ocellus 
  shorter 
  than 
  

   ocell-ocular 
  line 
  and 
  little 
  more 
  than 
  half 
  as 
  long 
  as 
  postocellar 
  line; 
  

   antennae 
  filiform, 
  flagellum 
  of 
  uniform 
  thickness 
  throughout, 
  first 
  

   two 
  joints 
  elongate 
  and 
  equal 
  in 
  length. 
  Thorax: 
  pronotum 
  punc- 
  

   tate 
  above, 
  obliquely 
  striate 
  in 
  middle, 
  polished 
  in 
  lower 
  angle; 
  

   mesoscutum 
  shining, 
  sparsely 
  punctate, 
  declivous 
  anteriorly, 
  notauli 
  

   sharp, 
  narrow, 
  minutely 
  foveolate, 
  reaching 
  nearly 
  to 
  middle; 
  scu- 
  

   tellum 
  convex, 
  shining 
  and 
  sparsely 
  punctate 
  basally, 
  longitudinally 
  

   striato-punctate 
  apically, 
  carinae 
  distinct 
  to 
  middle; 
  mesopleurum 
  

   and 
  sternum 
  and 
  metapleurum 
  opaque 
  punctate, 
  the 
  mesopleurum 
  

   shining 
  and 
  more 
  sparsely 
  punctate 
  above 
  and 
  polished 
  in 
  upper 
  

   posterior 
  corner, 
  sternauli 
  short 
  and 
  broad; 
  propodeum 
  opaque 
  

   punctate, 
  basal 
  lateral 
  areas 
  shining 
  and 
  sparsely 
  punctate, 
  basal 
  

   carina 
  only 
  slightly 
  curved, 
  apical 
  carina 
  narrowly 
  separated 
  from 
  it 
  

   medially, 
  with 
  short 
  carinate 
  apophyses, 
  petiolar 
  area 
  very 
  broad 
  and 
  

   flat; 
  aerolet 
  almost 
  regularly 
  pentagonal; 
  discocubitus 
  unbroken; 
  

   nervellus 
  broken 
  at 
  the 
  middle, 
  reclivous; 
  legs 
  long, 
  slender, 
  hind 
  

   tibia 
  slightly 
  longer 
  than 
  femur, 
  basitarsus 
  very 
  nearly 
  as 
  long 
  as 
  

   other 
  joints 
  combined, 
  pulvillus 
  very 
  small. 
  Abdomen 
  subclavate; 
  

   first 
  tergite 
  longer 
  than 
  second, 
  very 
  slender, 
  flattened 
  above, 
  polished, 
  

   postpetiole 
  about 
  twice 
  as 
  wide 
  as 
  petiole, 
  slightly 
  decurved, 
  with 
  a 
  

   distinct 
  longitudinal 
  impression 
  between 
  the 
  spiracles; 
  abdomen 
  

   otherwise 
  very 
  finely 
  granularly 
  opaque, 
  second 
  tergite 
  nearly 
  as 
  broad 
  

   as 
  long 
  and 
  more 
  than 
  twice 
  as 
  broad 
  at 
  apex 
  as 
  at 
  base, 
  gastrocoeli 
  

   very 
  small, 
  spiracles 
  far 
  beyond 
  middle 
  and 
  close 
  to 
  margin; 
  sheath 
  

   shorter 
  than 
  first 
  tergite. 
  

  

  Black; 
  first 
  and 
  second 
  tergites 
  narrowly 
  reddish 
  apically; 
  apex 
  of 
  

   abdomen 
  with 
  a 
  white 
  spot 
  beginning 
  on 
  sixth 
  tergite 
  ; 
  wings 
  hyaline, 
  

   venation 
  black; 
  front 
  legs 
  beyond 
  trochanters 
  and 
  middle 
  and 
  hind 
  

   femora 
  except 
  at 
  apex 
  testaceous, 
  legs 
  otherwise 
  black 
  to 
  piceous. 
  

  

  Mole. 
  — 
  Differs 
  from 
  female 
  as 
  follows: 
  temples 
  less 
  strongly 
  nar- 
  

   rowed 
  and 
  more 
  strongly 
  convex; 
  face 
  only 
  slightly 
  narrower 
  than 
  

   frons; 
  molar 
  space 
  nearly 
  as 
  long 
  as 
  basal 
  width 
  of 
  mandible; 
  antennae 
  

   slightly 
  tapering 
  apically; 
  thorax 
  dorsally 
  more 
  strongly 
  and 
  densely 
  

   punctate; 
  nervellus 
  broken 
  distinctly 
  above 
  middle; 
  hind 
  tibia 
  much. 
  

  

  