﻿76 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol.67 
  

  

  vinced 
  me 
  that 
  they 
  are 
  the 
  same 
  species. 
  Eyes 
  very 
  broad, 
  not 
  dis- 
  

   tinctly 
  one 
  and 
  one-half 
  times 
  as 
  long 
  as 
  broad, 
  in 
  the 
  female; 
  

   malar 
  space, 
  in 
  the 
  female, 
  very 
  nearly 
  half 
  as 
  long 
  as 
  the 
  distance 
  

   from 
  the 
  lower 
  margin 
  of 
  antennal 
  foramina 
  to 
  lower 
  margin 
  of 
  

   clypeus; 
  antennae 
  usually 
  36 
  to 
  40-segmented 
  ; 
  all 
  the 
  segments 
  

   at 
  least 
  one 
  and 
  one-half 
  times 
  as 
  long 
  as 
  broad; 
  face 
  and 
  frons 
  

   finely 
  punctate, 
  opaque; 
  thorax 
  stout, 
  smooth 
  and 
  polished; 
  pro- 
  

   podeum 
  mostly 
  polished 
  ; 
  second 
  abscissa 
  of 
  radius 
  a 
  little 
  more 
  than 
  

   twice 
  as 
  long 
  as 
  the 
  first; 
  the 
  third 
  slightly 
  longer 
  than 
  the 
  first 
  

   and 
  second 
  abscissae 
  combined; 
  second 
  abdominal 
  tergite 
  granular, 
  

   with 
  a 
  shining 
  irregularly 
  rugose 
  area 
  on 
  basal 
  middle; 
  third, 
  

   fourth, 
  fifth, 
  and 
  in 
  the 
  female, 
  the 
  sixth, 
  tergites 
  finely 
  sculptured 
  ; 
  

   suturiform 
  articulation 
  rather 
  broad, 
  foveolate, 
  usually 
  a 
  little 
  arcu- 
  

   ate 
  medially; 
  ovipositor 
  sheaths 
  as 
  long 
  as 
  the 
  abdomen 
  beyond 
  sec- 
  

   ond 
  tergite 
  or 
  a 
  little 
  longer. 
  Yellow; 
  spot 
  enclosing 
  ocelli, 
  and 
  

   occiput 
  usually 
  blackish; 
  thorax 
  varying 
  from 
  mostly 
  black 
  to 
  

   blackish 
  only 
  on 
  the 
  mesonotal 
  lobes 
  and 
  propodeum; 
  wings 
  usually 
  

   slightly 
  dusky; 
  legs, 
  including 
  all 
  coxae, 
  yellow; 
  abdomen 
  yellow, 
  

   with 
  first 
  tergite 
  and 
  a 
  median 
  spot 
  on 
  second, 
  black; 
  apical 
  ter- 
  

   gites 
  usually 
  brownish. 
  

  

  Distribution. 
  — 
  Canada; 
  Virginia; 
  New 
  York; 
  Massachusetts; 
  

   Pennsylvania. 
  

  

  Hosts. 
  — 
  Lixus 
  scrobicollis 
  Boheman, 
  in 
  Ambrosia 
  triftda; 
  Papai- 
  

   pema 
  nebris 
  Guenee. 
  

  

  But 
  little 
  material 
  of 
  this 
  species, 
  in 
  addition 
  to 
  the 
  types, 
  has 
  

   been 
  seen. 
  The 
  United 
  States 
  National 
  Museum 
  has 
  two 
  specimens 
  

   reared 
  by 
  H. 
  Bird 
  at 
  Rye, 
  New 
  York, 
  from 
  Papaipema 
  nebris; 
  and 
  

   a 
  collected 
  specimen 
  from 
  Natrona, 
  Pennsylvania. 
  The 
  Corn-Borer 
  

   Laboratory 
  of 
  the 
  Bureau 
  of 
  Entomology 
  has 
  two 
  specimens 
  reared 
  

   from 
  Ambrosia 
  at 
  Manchester, 
  Massachusetts. 
  All 
  these 
  specimens 
  

   are 
  females. 
  

  

  66. 
  MICROBRACON 
  CERAMBYCIDIPHAGUS, 
  new 
  species 
  

   Fig. 
  16 
  

  

  Very 
  similar 
  to 
  the 
  preceding 
  in 
  habitus, 
  structure 
  and 
  sculpture 
  ; 
  

   it 
  will 
  frequently 
  be 
  found 
  difficult 
  to 
  distinguish 
  them. 
  The 
  char- 
  

   acters 
  given 
  in 
  the 
  key 
  together 
  with 
  the 
  description 
  should, 
  how- 
  

   ever, 
  suffice 
  to 
  separate 
  these 
  two 
  species, 
  at 
  least 
  in 
  the 
  female 
  sex. 
  

  

  Female. 
  — 
  Length 
  3.5 
  mm. 
  Head 
  about 
  as 
  in 
  lutus; 
  temples 
  reced- 
  

   ing 
  directly 
  behind 
  eyes; 
  malar 
  space 
  as 
  in 
  lutus; 
  postocellar 
  line 
  

   hardly 
  exceeding 
  the 
  diameter 
  of 
  an 
  ocellus; 
  antennae 
  of 
  type 
  37- 
  

   segmented, 
  the 
  two 
  basal 
  flagellar 
  segments 
  and 
  also 
  the 
  apical 
  seg- 
  

   ments 
  twice 
  as 
  long 
  as 
  thick 
  ; 
  thorax 
  stout, 
  smooth 
  and 
  polished 
  ; 
  

   propodeum 
  a 
  little 
  roughened 
  medially 
  toward 
  apex 
  ; 
  second 
  abscissa 
  

   of 
  radius 
  more 
  than 
  twice 
  as 
  long 
  as 
  the 
  first; 
  the 
  third 
  a 
  little 
  

  

  