﻿118 
  Dr. 
  G. 
  C. 
  Crampton 
  on 
  Insects 
  related 
  to 
  Neuroptera. 
  

  

  Leg 
  in 
  Insects," 
  Zool. 
  Jahrb., 
  Abt. 
  Anat., 
  39, 
  pp. 
  1-26), 
  the 
  

   internal 
  development 
  of 
  the 
  wings, 
  complete 
  metamorphosis, 
  

   etc. 
  ; 
  while 
  the 
  Psocidae, 
  Mallophaga, 
  Pedicuhdae, 
  Hemi- 
  

   ptera 
  and 
  Homoptera, 
  with 
  their 
  fossil 
  relatives 
  (and 
  

   possibly 
  including 
  the 
  Thysanoptera 
  also) 
  may 
  be 
  grouped 
  

   in 
  a 
  second 
  superorder 
  called 
  the 
  Panhomoptera 
  (Psyche, 
  

   I.e.), 
  characterised 
  in 
  general 
  by 
  the 
  reduction 
  of 
  the 
  

   number 
  of 
  tarsal 
  segments 
  to 
  not 
  more 
  than 
  three, 
  no 
  divi- 
  

   sion 
  of 
  the 
  mesothoracic 
  coxae 
  (save 
  in 
  rare 
  instances), 
  

   external 
  development 
  of 
  the 
  wings, 
  and 
  practically 
  no 
  

   marked 
  metamorphosis. 
  There 
  are 
  some 
  exceptions; 
  but 
  

   for 
  the 
  most 
  part, 
  these 
  characters 
  hold 
  good 
  for 
  the 
  more 
  

   primitive 
  representatives 
  of 
  each 
  group. 
  

  

  