﻿CHALCIDOID 
  PARASITES 
  OF 
  PSYLLIDS. 
  43 
  

  

  Psyllaephagus 
  pachypsyllae, 
  How. 
  

  

  Encyrtus 
  pachypsyllae, 
  Howard, 
  Bull. 
  No. 
  5, 
  U.S. 
  Dept. 
  Agric. 
  Bur. 
  Entom., 
  

   p. 
  15, 
  1885. 
  

  

  The 
  original 
  description 
  is 
  as 
  follows 
  : 
  — 
  

  

  " 
  24. 
  (8) 
  Encyrtus 
  pachypsyllae, 
  n. 
  sp. 
  

  

  " 
  This 
  species 
  is 
  closely 
  related 
  to 
  E. 
  trioziphagus. 
  The 
  minute 
  spines 
  at 
  the 
  

   distal 
  end 
  of 
  the 
  posterior 
  tibia, 
  opposite 
  the 
  tibial 
  spur, 
  are 
  longer 
  and 
  more 
  curved 
  

   than 
  with 
  trioziphagus. 
  The 
  coloration 
  differs 
  in 
  that 
  with 
  pachypsyllae 
  the 
  tibiae 
  

   and 
  tarsi 
  are 
  all 
  light 
  honey-yellow, 
  and 
  the 
  flagellum 
  of 
  the 
  <J 
  antenna 
  is 
  light 
  brown. 
  

   The 
  <J 
  antenna 
  also 
  differs 
  from 
  that 
  of 
  trioziphagus 
  in 
  that 
  joints 
  1, 
  2, 
  and 
  3 
  of 
  the 
  

   funicle 
  are 
  fang-shaped 
  instead 
  of 
  2, 
  3, 
  and 
  4. 
  The 
  dimensions 
  on 
  the 
  average 
  are 
  

   the 
  same 
  in 
  both 
  species, 
  although 
  pachypsyllae 
  is 
  quite 
  variable 
  in 
  the 
  $. 
  

  

  " 
  Described 
  from 
  many 
  <$ 
  and 
  $ 
  specimens 
  bred, 
  between 
  May 
  5 
  and 
  10, 
  1884, 
  

   from 
  galls 
  of 
  Pachypsylla 
  celtidis-gemma 
  , 
  Riley, 
  collected 
  in 
  Southern 
  Maryland. 
  

   [Dept. 
  Agr. 
  and 
  C.V.R. 
  Coll.]." 
  

  

  Type 
  in 
  the 
  United 
  States 
  National 
  Museum. 
  

  

  Psyllaephagus 
  trioziphagus, 
  How. 
  

  

  Encyrtus 
  trioziphagus, 
  Howard, 
  Bull. 
  No. 
  5, 
  U.S. 
  Dept. 
  Agric. 
  Bur. 
  Entom., 
  

   p. 
  14, 
  1885. 
  

  

  The 
  original 
  description 
  is 
  as 
  follows 
  : 
  — 
  

  

  " 
  22. 
  (6). 
  Encyrtus 
  trioziphagus, 
  n. 
  sp. 
  

  

  " 
  Female. 
  — 
  Length, 
  1-3 
  mm. 
  ; 
  wing 
  expanse, 
  2 
  -9 
  mm. 
  ; 
  greatest 
  width 
  of 
  fore 
  

   wing, 
  0-51 
  mm. 
  Antenna! 
  scape 
  stout, 
  short, 
  not 
  reaching 
  to 
  top 
  of 
  the 
  eyes, 
  with 
  

   no 
  foliation 
  below 
  ; 
  pedicel 
  short, 
  conical, 
  as 
  thick 
  as 
  long 
  and 
  not 
  exceeding 
  in 
  

   length 
  the 
  first 
  funicle 
  joint 
  ; 
  joints 
  of 
  funicle 
  hard 
  to 
  distinguish, 
  somewhat 
  flattened 
  

   and 
  subequal 
  in 
  length, 
  sixth 
  as 
  broad 
  as 
  long 
  ; 
  club 
  subfusiform, 
  as 
  long 
  as 
  three 
  

   preceding 
  funicle 
  joints 
  together. 
  Antennal 
  grooves 
  deep 
  ; 
  two 
  slight 
  malar 
  im- 
  

   pressions 
  ; 
  clypeus 
  and 
  vertex 
  covered 
  with 
  fine 
  punctures, 
  lower 
  face 
  smooth, 
  

   eyes 
  wide 
  apart 
  ; 
  ocelli 
  form 
  a 
  very 
  obtuse-angled 
  triangle. 
  Mesonotum 
  delicately 
  

   shagreened, 
  with 
  slight, 
  sparse 
  punctures, 
  each 
  giving 
  rise 
  to 
  a 
  short, 
  delicate 
  hair 
  ; 
  

   no 
  marked 
  difference 
  between 
  scutum 
  and 
  scutellum 
  in 
  punctuation 
  ; 
  axillae 
  just 
  

   meet 
  at 
  tips. 
  Wings 
  perfectlv 
  clear 
  ; 
  marginal 
  vein 
  wanting 
  ; 
  stigmal 
  one-third 
  

   longer 
  than 
  postmarginal. 
  Abdomen 
  nearly 
  circular, 
  sunken 
  in 
  center. 
  Color 
  : 
  

   Flagellum 
  of 
  antennae 
  brown 
  ; 
  scape 
  and 
  pedicel 
  black, 
  with 
  a 
  greenish 
  luster 
  ; 
  

   lower 
  part 
  of 
  face 
  with 
  a 
  brilliant 
  purplish-blue 
  luster 
  ; 
  clypeus 
  and 
  vertex 
  dark 
  

   coppery-brown 
  ; 
  pronotum, 
  coppery 
  ; 
  mesonotum 
  bright 
  shining 
  green, 
  the 
  scutum 
  

   somewhat 
  more 
  brilliant 
  than 
  the 
  scutellum 
  ; 
  metanotum 
  and 
  abdomen 
  shining 
  

   black, 
  with 
  a 
  dark 
  green 
  luster 
  ; 
  all 
  coxae 
  and 
  femora 
  dark 
  green, 
  honey-yellow 
  at 
  

   tips 
  ; 
  front 
  tibiae 
  honey-yellow, 
  greenish 
  at 
  base 
  ; 
  middle 
  tibiae 
  entirely 
  honey- 
  

   yellow, 
  sometimes 
  with 
  a 
  slight 
  green 
  spot 
  near 
  base 
  ; 
  hind 
  tibiae 
  green, 
  honey-yellow 
  

   at 
  either 
  end 
  ; 
  front 
  and 
  hind 
  tarsi 
  brownish 
  ; 
  middle 
  tarsi 
  yellow. 
  

  

  "Male. 
  — 
  Length, 
  1mm.; 
  wing 
  expanse, 
  2-5 
  mm. 
  ; 
  greatest 
  width 
  of 
  fore 
  

   wing, 
  0-5 
  mm. 
  Differs 
  from 
  $ 
  chiefly 
  in 
  the 
  antennae. 
  The 
  flagellum 
  is 
  much 
  

   flattened 
  ; 
  scape 
  still 
  shorter 
  than 
  in 
  2 
  ; 
  pedicel 
  very 
  short 
  and 
  insignificant 
  ; 
  joint 
  

   1 
  of 
  the 
  funicle 
  twice 
  as 
  long 
  as 
  wide, 
  and 
  three 
  times 
  as 
  long 
  as 
  pedicel 
  ; 
  joints 
  

   2, 
  3, 
  and 
  4 
  are 
  fang-shaped 
  dorsally 
  ; 
  joint 
  3 
  more 
  acute 
  than 
  2 
  and 
  4 
  ; 
  joints 
  5 
  

   and 
  6 
  resemble 
  joint 
  1 
  in 
  size 
  and 
  proportions 
  ; 
  club 
  short 
  and 
  suboval. 
  Abdomen 
  

   short 
  and 
  subcordate 
  in 
  form. 
  

  

  " 
  Described 
  from 
  4 
  $'s 
  and 
  2 
  <$'s 
  bred, 
  November 
  7, 
  1881, 
  from 
  the 
  galls 
  of 
  the 
  

   Psyllid 
  Trioza 
  diospvri 
  (Ashmead), 
  on 
  the 
  Persimmon 
  (Diospyros 
  virginiana) 
  on 
  the 
  

   Department 
  grounds 
  at 
  Washington. 
  

  

  