﻿6 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  los 
  

  

  Type 
  locality. 
  — 
  ^Mexico, 
  Veracruz, 
  Jalapa. 
  

  

  Material 
  examined. 
  — 
  ^Holotype 
  (female) 
  and 
  a 
  single 
  female 
  para- 
  

   type 
  from 
  Mexico, 
  Oaxaca, 
  Camotlan, 
  collected 
  by 
  W. 
  S. 
  Miller, 
  April 
  

   14, 
  1944, 
  in 
  the 
  U. 
  S. 
  National 
  Museum. 
  

  

  Remarks. 
  — 
  In 
  external 
  appearance, 
  A. 
  bispinus 
  is 
  superficially 
  in- 
  

   distinguishable 
  from 
  A. 
  cosmius 
  and, 
  as 
  such, 
  has 
  probably 
  shared 
  

   the 
  latter's 
  confusion 
  as 
  A. 
  signoreti 
  Stal, 
  1862, 
  in 
  collections. 
  How- 
  

   ever, 
  the 
  structure 
  of 
  the 
  female 
  subgenital-plate 
  apices 
  is 
  quite 
  dif- 
  

   ferent 
  in 
  the 
  two 
  species. 
  In 
  this 
  respect, 
  A. 
  hispinus 
  most 
  closely 
  

   resembles 
  A. 
  guttatipennis 
  Stal, 
  1876, 
  but 
  while 
  the 
  subgenital 
  plates 
  

   might 
  not 
  be 
  able, 
  alone, 
  to 
  separate 
  all 
  variables 
  of 
  both 
  species, 
  the 
  

   possession 
  of 
  primary 
  and 
  secondary 
  connexival 
  angles 
  on 
  abdominal 
  

   segment 
  V, 
  with 
  present 
  material, 
  sharply 
  sets 
  A. 
  hispinus 
  off 
  from 
  

   all 
  other 
  Ambrysi 
  of 
  the 
  signoreti 
  group. 
  These 
  two 
  angles 
  are 
  more 
  

   specifically 
  referred 
  to 
  as 
  the 
  posterolateral 
  and 
  laterocaudal 
  con- 
  

   nexival 
  angles, 
  and 
  the 
  laterocaudal 
  is 
  lacking 
  in 
  all 
  other 
  known 
  

   members 
  of 
  the 
  group. 
  It 
  has 
  shown 
  up 
  in 
  other, 
  distant 
  sections 
  

   of 
  the 
  genus, 
  being 
  known 
  in 
  A. 
  parviceps 
  Montandon, 
  1897, 
  A. 
  hun- 
  

   gerfordi 
  Usinger, 
  1946 
  (both 
  in 
  the 
  pudicus 
  group), 
  and 
  A. 
  puncti- 
  

   collis 
  Stal, 
  1876 
  (a 
  monotypic 
  group). 
  It 
  is 
  this 
  character 
  upon 
  

   which 
  the 
  specific 
  name 
  of 
  A. 
  hispinus 
  is 
  based. 
  In 
  addition, 
  the 
  

   male 
  genital 
  process, 
  when 
  known, 
  will 
  furnish 
  more 
  evidence 
  of 
  the 
  

   species' 
  affiliations, 
  either 
  supplementing 
  or 
  diverting 
  present 
  indica- 
  

   tions. 
  

  

  The 
  following 
  couplets 
  will 
  enable 
  the 
  new 
  species 
  to 
  be 
  incorpo- 
  

   rated 
  in 
  my 
  key 
  to 
  Mexican 
  Ambrysi 
  now 
  in 
  press 
  : 
  

  

  24 
  (15). 
  Female 
  subgenital 
  plate, 
  viewed 
  ventrally, 
  asymmetrical 
  on 
  left 
  side, 
  

  

  where 
  a 
  prominent 
  flap 
  occupies 
  the 
  border 
  beyond 
  (laterad 
  of) 
  the 
  

   left 
  lateral 
  angle 
  ; 
  right 
  border 
  scarcely 
  produced. 
  

  

  dilatus 
  Montandon, 
  1910 
  

  

  Female 
  subgenital 
  plate, 
  viewed 
  ventrally, 
  not 
  markedly 
  or 
  noticeably 
  

  

  asymmetrical 
  from 
  one 
  lateral 
  border 
  to 
  the 
  other 
  25 
  

  

  25 
  (24). 
  Female 
  possessing 
  both 
  primary 
  and 
  secondary 
  posterolateral 
  connexi- 
  

  

  val 
  spines 
  on 
  abdominal 
  sternite 
  V 
  (i. 
  e., 
  the 
  primary 
  angle 
  being 
  the 
  

   posterolatei-al 
  angle 
  proper, 
  the 
  secondary 
  angle 
  being 
  the 
  laterocaudal 
  

  

  angle) 
  bispinus, 
  new 
  species 
  

  

  Female 
  lacking 
  the 
  secondary 
  (laterocaudal) 
  angle. 
  

  

  remaining 
  Mexican 
  species 
  of 
  the 
  signoreti 
  group 
  

  

  