﻿510 
  Mr. 
  E. 
  McLa'chian's 
  descriptions 
  of 
  

  

  5th 
  segments, 
  aud 
  indistinctly 
  on 
  those 
  succeeding, 
  there 
  is, 
  above, 
  a 
  

   velvety 
  black 
  interrupted 
  line 
  on 
  each 
  side, 
  and 
  a 
  similar 
  trans- 
  

   verse 
  line 
  at 
  the 
  end 
  of 
  the 
  segments, 
  intei'rupted 
  in 
  the 
  middle 
  ; 
  

   beneath, 
  the 
  basal 
  segments 
  are 
  yellowish, 
  vpith 
  three 
  shining 
  black 
  

   interrupted 
  lines, 
  and 
  similar 
  black 
  semickcles 
  at 
  the 
  segmental 
  

   divisions 
  ; 
  apex 
  above 
  yellowish, 
  and 
  there 
  is 
  a 
  pair 
  of 
  short, 
  stout, 
  

   yellow 
  appendages, 
  somewhat 
  thickened 
  towards 
  the 
  obtuse 
  apices, 
  

   and 
  with 
  strong 
  black 
  outstanding 
  hairs 
  ; 
  in 
  the 
  $ 
  the 
  black 
  velvety 
  

   lines 
  above 
  are 
  more 
  defined 
  and 
  complete. 
  Wings 
  of 
  the 
  form 
  

   and 
  structure 
  usual 
  in 
  the 
  genus 
  ; 
  vitreous, 
  the 
  subcostal 
  area 
  in- 
  

   fuscated 
  ; 
  neuration 
  black, 
  radius 
  and 
  a 
  few 
  basal 
  nervules 
  whitish- 
  

   yellow 
  ; 
  pterostigma 
  consisting 
  of 
  a 
  small 
  infuscate 
  mark 
  on 
  

   thickened 
  nervules 
  (not 
  strictly 
  defined) 
  ; 
  40 
  — 
  45 
  ante-pterostig- 
  

   matical 
  costal 
  nervules, 
  whereof 
  the 
  last 
  3 
  or 
  4 
  are 
  often 
  connected; 
  

   post-stigmatical 
  area 
  with 
  4 
  — 
  5 
  obHque 
  rows 
  of 
  cellules. 
  Length 
  

   of 
  body, 
  31 
  — 
  32 
  mm. 
  Expanse 
  of 
  wings, 
  80—85 
  mm. 
  

  

  Hob. 
  Arizona 
  {H. 
  K. 
  Morrison). 
  Three 
  males, 
  two 
  

   females, 
  in 
  vaj 
  collection. 
  

  

  Of 
  the 
  same 
  size 
  and 
  form 
  as 
  P. 
  appendiculatus, 
  F., 
  

   and 
  much 
  resembling 
  it, 
  differing 
  slightly 
  in 
  the 
  costal 
  

   area 
  not 
  being 
  infuscate, 
  and 
  especially 
  in 
  the 
  furcate 
  

   process 
  on 
  the 
  dorsum 
  of 
  the 
  3rd 
  abdominal 
  segment 
  

   in 
  the 
  S^ 
  , 
  of 
  which 
  there 
  is 
  not 
  a 
  vestige 
  in 
  P. 
  appcn- 
  

   diculatiis. 
  There 
  is 
  similarity 
  in 
  the 
  colour 
  of 
  thorax, 
  

   legs, 
  and 
  wings 
  to 
  P. 
  juvenilis, 
  McLach., 
  from 
  Texas. 
  

   The 
  single 
  type 
  of 
  this 
  has 
  lost 
  the 
  abdomen 
  ; 
  its 
  

   size 
  is 
  so 
  much 
  smaller 
  (exp. 
  70 
  mm.) 
  that 
  it 
  can 
  

   scarcely 
  be 
  the 
  same. 
  Moreover, 
  in 
  a 
  letter 
  received 
  

   from 
  l)r. 
  Hagen 
  soon 
  after 
  the 
  publication 
  of 
  my 
  

   ' 
  Classification 
  of 
  the 
  Ascalaplndce/ 
  he 
  gives 
  a 
  running 
  

   commentary 
  on 
  the 
  results 
  of 
  a 
  comparison 
  of 
  that 
  

   work 
  with 
  the 
  materials 
  in 
  his 
  collection, 
  and 
  says 
  he 
  

   possesses 
  one 
  3' 
  of 
  A. 
  juvenilis 
  from 
  Texas, 
  and 
  makes 
  

   no 
  mention 
  of 
  the 
  structural 
  peculiarity 
  in 
  the 
  dorsum 
  

   of 
  the 
  abdomen, 
  which 
  he 
  would 
  certainly 
  have 
  done 
  

   had 
  it 
  been 
  present. 
  

  

  Campylophlebia,* 
  n. 
  g. 
  

  

  Wings 
  elongate, 
  broad, 
  of 
  nearly 
  equal 
  form, 
  the 
  posterior 
  some- 
  

   what 
  narrower 
  and 
  shorter 
  ; 
  the 
  anterior 
  excised 
  at 
  the 
  extreme 
  

  

  ''■ 
  In 
  placing 
  this 
  genus 
  in 
  the 
  Holophthahni 
  it 
  is 
  necessary 
  to 
  

   state 
  that 
  the 
  eyes 
  in 
  the 
  single 
  type 
  are 
  badly 
  crushed, 
  but 
  in 
  one 
  

   of 
  them 
  I 
  can 
  see 
  nearly 
  the 
  whole 
  of 
  the 
  basal 
  ch'cumference, 
  and 
  

   do 
  not 
  detect 
  indications 
  of 
  any 
  dividing 
  line. 
  

  

  