﻿CRICKET 
  PARASITE 
  — 
  GURNEY 
  33 
  

  

  Rhopalosoma^ 
  but 
  as 
  in 
  the 
  latter 
  the 
  maxilla 
  and 
  labium 
  have 
  two 
  

   pairs 
  of 
  appendages 
  each. 
  A 
  conspicuous 
  difference 
  is 
  that 
  the 
  man- 
  

   dible 
  of 
  Larva 
  has 
  a 
  single 
  preapical 
  tooth 
  in 
  the 
  incisor 
  area, 
  and 
  

   basally 
  on 
  a 
  lower 
  lever 
  there 
  are 
  two 
  heavy 
  molar 
  teeth, 
  or 
  "pros- 
  

   thecae." 
  The 
  mesal 
  pair 
  of 
  elongate 
  labial 
  appendages 
  of 
  RhopalosoTna 
  

   has 
  apparent 
  homalogues 
  in 
  this 
  larrid. 
  

  

  The 
  mouth 
  parts 
  of 
  those 
  few 
  larvae 
  of 
  Bethylidae 
  and 
  Dryinidae 
  

   that 
  I 
  have 
  seen 
  are 
  much 
  reduced 
  or 
  otherwise 
  specialized. 
  Illustra- 
  

   tions 
  of 
  dryinid 
  larvae 
  on 
  the 
  bodies 
  of 
  leafhoppers, 
  such 
  as 
  those 
  

   of 
  Haupt 
  (1916)^ 
  show 
  that 
  the 
  parasite 
  larva 
  sometimes 
  remains 
  

   associated 
  with 
  its 
  exuviae 
  in 
  a 
  manner 
  suggestive 
  of 
  Rhopalosoma. 
  

   The 
  genus 
  Harpagocryptus 
  Perkins, 
  based 
  on 
  a 
  species 
  that 
  Perkins 
  

   (1908) 
  described 
  from 
  Queensland, 
  is 
  of 
  interest 
  in 
  this 
  connection 
  

   because 
  the 
  larva 
  was 
  said 
  to 
  form 
  "a 
  sac 
  on 
  the 
  sides 
  of 
  the 
  abdomen 
  

   of 
  small 
  crickets 
  (Trigonidiidae)." 
  Although 
  originally 
  referred 
  by 
  

   Perkins 
  to 
  the 
  Dryinidae, 
  Bischoff 
  (1927, 
  p. 
  407) 
  called 
  Harpago- 
  

   cryptus 
  a 
  bethylid, 
  and 
  Reid 
  (1939) 
  suggested 
  that 
  it 
  may 
  be 
  a 
  psam- 
  

   mocharid. 
  As 
  with 
  Rhopalosoma^ 
  a 
  knowledge 
  of 
  the 
  immature 
  stages 
  

   of 
  Harpagocryptus 
  might 
  prove 
  of 
  great 
  value 
  when 
  adequate 
  com- 
  

   parative 
  studies 
  eventually 
  are 
  possible. 
  

  

  References 
  

  

  AsHMEAD, 
  William 
  H. 
  

  

  1896 
  Rhopalosomidae, 
  a 
  new 
  family 
  of 
  fossorial 
  wasps. 
  Proc. 
  Ent. 
  Soc. 
  

   Washington, 
  vol. 
  3, 
  pp. 
  303-309. 
  

   Betkne, 
  Bryan 
  P. 
  

  

  1941 
  A 
  consideration 
  of 
  the 
  cephalic 
  structures 
  and 
  spiracles 
  of 
  the 
  final 
  

   instar 
  larvae 
  of 
  the 
  Ichneumonidae 
  (Hym.). 
  Trans. 
  Soc. 
  British 
  

   Ent., 
  vol. 
  7, 
  pp. 
  123-190, 
  31 
  figs. 
  

   Bischoff, 
  H. 
  

  

  1927 
  Biologic 
  der 
  Hymenopteren. 
  598 
  pp., 
  224 
  figs. 
  Berlin. 
  

   Blatchlet, 
  W. 
  S. 
  

  

  1920 
  Orthoptera 
  of 
  Northeastern 
  America. 
  784 
  pp., 
  246 
  figs. 
  Indianapolis. 
  

   Brites, 
  Charles 
  T. 
  

  

  1921 
  Correlation 
  of 
  taxonomic 
  affinities 
  with 
  food 
  habits 
  in 
  Hymenoptera, 
  

  

  with 
  special 
  reference 
  to 
  parasitism. 
  Amer. 
  Naturalist, 
  vol. 
  55, 
  pp. 
  

   134-164. 
  

   1943 
  The 
  American 
  species 
  of 
  Rhopalosoma. 
  Ann. 
  Ent. 
  Soc. 
  Amer., 
  vol. 
  36, 
  

   pp. 
  310-318, 
  9 
  figs. 
  

   Brues, 
  Charles 
  T., 
  and 
  Melandeb, 
  A. 
  L. 
  

  

  1932 
  Classification 
  of 
  insects. 
  Bull, 
  Mus. 
  Comp. 
  ZooL, 
  vol. 
  73, 
  pp. 
  1-672, 
  

   1121 
  figs. 
  

   Clausen, 
  Curtis 
  P. 
  

  

  1940 
  Entomophagous 
  insects. 
  688 
  pp., 
  257 
  figs. 
  

   Clausen, 
  Curtis 
  P., 
  King, 
  J. 
  L,, 
  and 
  Tebanishi, 
  Cho 
  

  

  1927 
  The 
  parasites 
  of 
  PopilUa 
  japonica 
  in 
  Japan 
  and 
  Chosen 
  (Korea), 
  

   and 
  their 
  introduction 
  into 
  the 
  United 
  States. 
  U. 
  S. 
  Dep. 
  Agr. 
  Dep. 
  

   Bull. 
  1429, 
  1-55 
  pp., 
  1 
  pi., 
  35 
  figs. 
  

  

  