﻿30 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  67 
  

  

  and 
  in 
  the 
  length 
  of 
  ovipositor, 
  it 
  can 
  be 
  separated 
  by 
  the 
  broader, 
  

   foveolate 
  suturiform 
  articulation, 
  the 
  presence 
  of 
  a 
  median 
  area 
  on 
  

   the 
  second 
  tergite 
  set 
  off 
  by 
  Short 
  longitudinal 
  furrows, 
  and 
  by 
  the 
  

   usually 
  more 
  coarsely 
  granular 
  sculpture 
  of 
  the 
  abdomen. 
  Antennae 
  

   of 
  female 
  usually 
  22 
  to 
  25 
  segmented, 
  of 
  the 
  male 
  24 
  to 
  27 
  segmented 
  ; 
  

   first 
  flagellar 
  segment 
  twice 
  as 
  long 
  as 
  thick; 
  head 
  and 
  thorax 
  en- 
  

   tirely 
  finely 
  granular; 
  first 
  abscissa 
  of 
  radius 
  usually 
  as 
  long 
  as 
  the 
  

   second 
  ; 
  the 
  part 
  of 
  cubitus 
  between 
  recurrent 
  and 
  intercubitus 
  longer 
  

   than 
  the 
  recurrent 
  ; 
  propocleum 
  without 
  a 
  distinct 
  median 
  carina 
  pos- 
  

   teriorly 
  ; 
  head 
  and 
  thorax 
  mostly 
  black 
  ; 
  abdomen 
  usually 
  testaceous, 
  

   except 
  at 
  base. 
  

  

  Distribution. 
  — 
  Hollywood, 
  California 
  ; 
  Durango, 
  Mexico. 
  

  

  Hosts. 
  — 
  Platynota, 
  species 
  ; 
  Pectinophora 
  gossypiella 
  Saunders. 
  

  

  In 
  addition 
  to 
  the 
  types 
  the 
  National 
  Museum 
  has 
  a 
  small 
  series 
  of 
  

   specimens 
  reared 
  from 
  the 
  pink 
  bollworm, 
  at 
  Tlahualilo 
  and 
  Lirdo, 
  

   Durango, 
  Mexico, 
  by 
  A. 
  C. 
  Johnson 
  and 
  N. 
  B. 
  McKinney. 
  

  

  10. 
  MICROBRACON 
  XANTHONOTUS 
  (Ashmead) 
  

   Fig. 
  26 
  

  

  Bracon 
  xanthonotus 
  Ashmead, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  11, 
  1SS9 
  (1888), 
  

  

  p. 
  618. 
  

   Habrobracon 
  hopkinsi 
  Viereck, 
  Proe. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  38, 
  1910, 
  p. 
  3S0. 
  

   Habrobracon 
  mali 
  Viereck, 
  Proc. 
  U. 
  S. 
  Nat. 
  Mus., 
  vol. 
  44, 
  1913, 
  p. 
  641. 
  

   Habrobracon 
  xanthonotus 
  Cushman, 
  Proc. 
  Ent. 
  Soc. 
  Wash., 
  vol. 
  16, 
  1914, 
  p. 
  

  

  105. 
  

  

  7^.— 
  Cat. 
  No. 
  14757, 
  U.S.N.M. 
  The 
  types 
  of 
  hopkinsi 
  (Cat. 
  

   No. 
  12284) 
  and 
  mali 
  (Cat. 
  No. 
  15331) 
  are 
  also 
  in 
  the 
  National 
  

   Museum. 
  

  

  A 
  thorough 
  study 
  of 
  the 
  types 
  of 
  xanthonotus, 
  hopkinsi, 
  and 
  mali 
  

   can 
  leave 
  no 
  doubt 
  that 
  all, 
  as 
  Cushman 
  suggested, 
  belong 
  to 
  the 
  

   same 
  species. 
  The 
  characters 
  upon 
  which 
  they 
  were 
  originally 
  sepa- 
  

   rated 
  are 
  all 
  extremely 
  variable. 
  Some 
  series 
  exhibit 
  practically 
  all 
  

   intergradations. 
  The 
  head 
  and 
  thorax 
  are 
  finely 
  punctate 
  or 
  minu- 
  

   tely 
  granular 
  ; 
  the 
  antennae 
  are 
  slender, 
  and 
  in 
  the 
  female 
  normally 
  

   23 
  to 
  27-segmented, 
  in 
  the 
  male 
  usually 
  25 
  to 
  28-segmented 
  ; 
  the 
  first 
  

   flagellar 
  segment 
  is 
  more 
  than 
  twice 
  as 
  long 
  as 
  thick, 
  in 
  the 
  male 
  

   nearly 
  three 
  times 
  as 
  long 
  as 
  thick 
  ; 
  malar 
  space 
  in 
  female 
  as 
  long 
  as 
  

   first 
  segment 
  of 
  flagellum, 
  but 
  considerably 
  shorter 
  in 
  the 
  male 
  ; 
  sec- 
  

   ond 
  abscissa 
  of 
  radius 
  nearly 
  always 
  a 
  little 
  longer 
  than 
  the 
  first; 
  

   third 
  abscissa 
  of 
  radius 
  going 
  very 
  nearly 
  to 
  extreme 
  apex 
  of 
  wing 
  

   and 
  as 
  long 
  as 
  last 
  abscissa 
  of 
  cubitus; 
  the 
  part 
  of 
  cubitus 
  between 
  

   recurrent 
  and 
  first 
  intercubitus 
  nearly 
  always 
  a 
  little 
  shorter 
  than 
  

   the 
  recurrent, 
  apparently 
  as 
  long 
  as 
  recurrent 
  in 
  some 
  small 
  males; 
  

   abdomen 
  usually 
  strongly 
  sculptured, 
  the 
  second 
  tergite 
  and 
  base 
  of 
  

   third 
  usually 
  longitudinally 
  rugulose; 
  the 
  oblique 
  grooves 
  on 
  first 
  

  

  