﻿art. 
  S 
  REVISION 
  OF 
  THE 
  GENUS 
  MICROBEACON 
  MUESEBECK 
  55 
  

  

  bles; 
  postocellar 
  line 
  one 
  and 
  one-half 
  times, 
  ocellocular 
  line 
  less 
  

   than 
  three 
  times, 
  as 
  long 
  as 
  the 
  diameter 
  of 
  an 
  ocellus 
  ; 
  antennae 
  23 
  

   segmented 
  in 
  the 
  type, 
  shorter 
  than 
  the 
  body, 
  all 
  the 
  flagellar 
  seg- 
  

   ments 
  considerably 
  longer 
  than 
  broad, 
  the 
  first 
  twice 
  as 
  long 
  as 
  broad 
  ; 
  

   eyes 
  very 
  short-oval, 
  only 
  a 
  little 
  longer 
  than 
  broad; 
  face 
  faintly 
  

   punctate, 
  shining; 
  frons 
  closely 
  minutely 
  punctate 
  or 
  reticulate; 
  

   thorax 
  compact, 
  smooth 
  and 
  polished 
  ; 
  scutellum 
  large, 
  the 
  furrow 
  be- 
  

   tween 
  it 
  and 
  the 
  mesoscutum 
  very 
  fine, 
  minutely 
  foveolate; 
  propo- 
  

   deum 
  polished, 
  with 
  a 
  short 
  stub 
  of 
  a 
  median 
  longitudinal 
  ridge 
  at 
  

   apex 
  ; 
  radius 
  arising 
  much 
  before 
  the 
  middle 
  of 
  the 
  long 
  stigma 
  and 
  

   going 
  to 
  extreme 
  apex 
  of 
  wing; 
  second 
  abscissa 
  of 
  radius 
  twice, 
  or. 
  

   nearly, 
  as 
  long 
  as 
  the 
  first, 
  the 
  third 
  about 
  as 
  long 
  as 
  the 
  first 
  and 
  

   second 
  combined; 
  abdomen 
  short 
  oval; 
  the 
  chitinized 
  plate 
  of 
  the 
  

   first 
  tergite 
  broad 
  posteriorly, 
  more 
  or 
  less 
  rugulose 
  laterally 
  and 
  

   faintly 
  sculptured 
  along 
  apical 
  margin; 
  second 
  tergite 
  emarginate 
  

   medially 
  behind, 
  mostly 
  smooth, 
  shining, 
  with 
  a 
  small 
  basal 
  median 
  

   embossed 
  area 
  set 
  off 
  by 
  short 
  impressions, 
  and 
  usually 
  with 
  two 
  

   longitudinal 
  furrows 
  laterally, 
  suturiform 
  articulation 
  arcuate 
  and 
  

   finely 
  foveolate; 
  third, 
  fourth, 
  and 
  fifth 
  tergites 
  evenly 
  granular; 
  

   ovipositor 
  sheaths 
  a 
  little 
  longer 
  than 
  the 
  abdomen. 
  Yellow; 
  an- 
  

   tennae 
  and 
  stemmaticum 
  black 
  ; 
  occipufblackish 
  ; 
  wings 
  very 
  slightly 
  

   dusky 
  ; 
  legs 
  yellow, 
  the 
  posterior 
  tibiae 
  at 
  apex 
  and 
  their 
  tarsi 
  dusky 
  ; 
  

   abdomen 
  entirely 
  yellow. 
  

  

  Male. 
  — 
  Agrees 
  with 
  the 
  female 
  except 
  for 
  the 
  usual 
  sexual 
  differ- 
  

   ences; 
  antennae 
  23-segmented 
  ; 
  the 
  mesonotal 
  lobes, 
  the 
  propodeum, 
  

   and 
  the 
  posterior 
  coxae 
  are 
  somewhat 
  infuscated. 
  

  

  Type.— 
  Cat, 
  No. 
  26667, 
  U.S.N.M. 
  

  

  Type-locality. 
  — 
  Sabino 
  Canyon, 
  Arizona. 
  

  

  Host. 
  — 
  Thurberiphaga 
  diffusa 
  Barnes. 
  

  

  Described 
  from 
  two 
  female 
  and 
  five 
  male 
  specimens 
  reared 
  by 
  C. 
  H. 
  

   T. 
  Townsend, 
  October 
  2, 
  1918. 
  The 
  thorax 
  and 
  abdomen 
  are 
  some- 
  

   times 
  more 
  or 
  less 
  marked 
  with 
  black, 
  and 
  the 
  middle 
  and 
  posterior 
  

   coxae, 
  at 
  least 
  of 
  the 
  males, 
  are 
  sometimes 
  black. 
  The 
  number 
  of 
  

   segments 
  in 
  the 
  antennae 
  varies, 
  in 
  this 
  series, 
  from 
  21 
  to 
  23. 
  

  

  40. 
  MICROBRACON 
  PITYOPHTHORI, 
  new 
  species 
  

  

  Female. 
  — 
  Length, 
  2.3 
  mm. 
  Head 
  much 
  thicker 
  at 
  insertion 
  of 
  

   antennae 
  than 
  at 
  the 
  clypeus, 
  the 
  face 
  strongly 
  receding; 
  malar 
  

   space 
  nearly 
  as 
  long 
  as 
  the 
  transverse 
  diameter 
  of 
  the 
  opening 
  be- 
  

   tween 
  clypeus 
  and 
  mandibles, 
  but 
  much 
  shorter 
  than 
  the 
  first 
  seg- 
  

   ment 
  of 
  antennal 
  flagellum; 
  eyes 
  short 
  oval, 
  hardly 
  one 
  and 
  one- 
  

   half 
  times 
  as 
  long 
  as 
  broad 
  ; 
  ocelli 
  small 
  ; 
  postocellar 
  line 
  about 
  one 
  

   and 
  one-half 
  times, 
  ocell-ocular 
  line 
  three 
  times, 
  as 
  long 
  as 
  the 
  

   diameter 
  of 
  an 
  ocellus; 
  antennae 
  very 
  slender, 
  slightly 
  shorter 
  than 
  

  

  