﻿188 
  

  

  JAMES 
  WATERSTON. 
  

  

  on 
  each 
  side 
  towards 
  the 
  broadly 
  oval 
  spiracle, 
  which 
  is 
  set 
  at 
  its 
  own 
  length 
  from 
  the 
  

   anterior 
  edge. 
  Round 
  the 
  spiracle 
  (exteriorly) 
  and 
  towards 
  the 
  hind 
  edge 
  the 
  surface 
  

   is 
  striate 
  ; 
  on 
  the 
  mesopleurae 
  the 
  pattern 
  is 
  drawn 
  out 
  finely 
  anteriorly, 
  but 
  becomes 
  

   more 
  regular 
  posteriorly. 
  

  

  Wings. 
  — 
  Forewings 
  (12 
  : 
  5), 
  length 
  1-3 
  mm., 
  breadth 
  0-56 
  mm. 
  (fig. 
  5). 
  Hind- 
  

   wings 
  (18 
  : 
  5), 
  length 
  0-9 
  mm., 
  breadth 
  0-25. 
  

  

  Fig. 
  5. 
  Encyrtus 
  cottevelli, 
  Waterst., 
  $, 
  forewing. 
  

  

  Legs. 
  — 
  Fore 
  femur 
  (4:1) 
  knife-like, 
  retaining 
  its 
  maximum 
  breadth 
  for 
  about 
  three- 
  

   fourths 
  of 
  its 
  length. 
  Mid 
  femur 
  and 
  tibia 
  of 
  equal 
  length, 
  the 
  latter 
  with 
  four 
  peg-like 
  

   spines 
  at 
  apex 
  posteriorly 
  ; 
  spur 
  three-fourths 
  as 
  long 
  as 
  the 
  1st 
  tarsal 
  joint. 
  Tarsus 
  

   (fig. 
  4, 
  /). 
  Hind 
  tibial 
  comb 
  with 
  about 
  18 
  spines. 
  

  

  Tarsus. 
  Fore 
  Leg. 
  Mid 
  Leg. 
  Hind 
  Leg. 
  

  

  1st 
  joint 
  40 
  85 
  80 
  

  

  2nd 
  joint 
  27 
  28 
  40 
  

  

  Abdomen, 
  though 
  smooth 
  and 
  shining, 
  with 
  the 
  mid 
  dorsal 
  surface 
  finely 
  and 
  

   regularly 
  reticulate. 
  Medianly 
  tergites 
  1-5 
  are 
  bare, 
  with 
  a 
  few 
  bristles 
  at 
  the 
  sides. 
  

   Ventrally 
  the 
  abdomen 
  is 
  covered 
  rather 
  closely 
  with 
  minute 
  bristles. 
  The 
  ovipositor 
  

   tip 
  is 
  barely 
  visible 
  from 
  above 
  and 
  the 
  free 
  portion 
  of 
  the 
  sheath 
  is 
  one-fifth 
  the 
  base. 
  

  

  Length, 
  3 
  - 
  2 
  mm. 
  

  

  Alar 
  expanse, 
  1 
  - 
  6 
  mm. 
  

  

  Type 
  $ 
  in 
  British 
  Museum. 
  

  

  Three 
  examples 
  were 
  bred 
  from 
  a 
  third 
  instar 
  n}/mph 
  of 
  the 
  Capsid 
  bug, 
  Sahlbergella 
  

   theobromae, 
  Dist., 
  which 
  is 
  injurious 
  to 
  cacao 
  (Theobroma 
  cacao), 
  at 
  Mampong, 
  Ashanti, 
  

   Gold 
  Coast, 
  West 
  Africa, 
  by 
  Mr. 
  G. 
  S. 
  Cotterell, 
  January 
  1922, 
  and 
  two 
  of 
  these 
  

   were 
  received 
  by 
  the 
  Imperial 
  Bureau 
  of 
  Entomology 
  from 
  Mr. 
  W. 
  H. 
  Patterson, 
  

   Government 
  Entomologist, 
  Aburi, 
  Gold 
  Coast. 
  

  

  In 
  neither 
  specimen 
  is 
  there 
  a 
  complete 
  antenna 
  and 
  the 
  general 
  condition 
  of 
  both 
  

   is 
  poor, 
  so 
  that 
  their 
  placing 
  has 
  been 
  a 
  matter 
  of 
  difficulty. 
  I 
  have 
  assigned 
  them 
  

   provisionally 
  to 
  the 
  genus 
  Encyrtus, 
  Dalm., 
  to 
  which 
  they 
  run 
  down, 
  but 
  with 
  which, 
  

   however, 
  they 
  do 
  not 
  quite 
  agree, 
  partly 
  because 
  of 
  their 
  mandibles, 
  but 
  chiefly 
  from 
  

   the 
  smooth 
  thoracic 
  notum 
  and 
  flat 
  scutellum. 
  My 
  friend, 
  Dr. 
  R. 
  G. 
  Mercet, 
  Madrid, 
  

   considers 
  that, 
  while 
  showing 
  certain 
  of 
  the 
  characters 
  of 
  Encyrtus, 
  these 
  Sahlbergella 
  

   parasites 
  should 
  be 
  regarded 
  as 
  constituting 
  a 
  distinct 
  genus. 
  

  

  