﻿NO. 
  1124. 
  REnSION 
  OF 
  THE 
  MELAXOPLI—SCl'DDER. 
  45 
  

  

  the 
  front 
  margin 
  truncate, 
  the 
  hind 
  margin 
  subrectangulate; 
  prozona 
  

   and 
  metazona 
  of 
  subequal 
  length, 
  the 
  sulcus 
  separating 
  them 
  distinct 
  

   but 
  not 
  deep, 
  suddenly 
  angulate 
  in 
  the 
  middle 
  by 
  the 
  emargination 
  of 
  

   the 
  prozona, 
  the 
  posterior 
  sulcus 
  of 
  the 
  prozona 
  arcuate 
  or 
  angulate 
  so 
  

   as 
  to 
  approach 
  it 
  in 
  the 
  middle, 
  the 
  middle 
  sulcus 
  subparallel 
  to 
  this 
  

   but 
  more 
  nearly 
  transverse 
  and 
  crossing 
  the 
  middle 
  of 
  the 
  prozona, 
  the 
  

   front 
  of 
  the 
  prozona 
  in 
  no 
  way 
  elevated 
  to 
  receive 
  the 
  head. 
  Pro- 
  

   sternal 
  spine 
  quadrate, 
  appressed, 
  broadly 
  truncate; 
  interspace 
  between 
  

   raesosternal 
  lobes 
  subquadrate, 
  a 
  little 
  longer 
  than 
  broad 
  in 
  the 
  male, 
  

   the 
  reverse 
  in 
  the 
  female, 
  the 
  metasternal 
  lobes 
  attingent 
  over 
  some 
  

   space 
  (male) 
  or 
  approximate 
  (female). 
  Tegmina 
  and 
  wings 
  fully 
  devel- 
  

   oped, 
  the 
  former 
  with 
  scarcely 
  any 
  ampliation 
  of 
  the 
  costa 
  near 
  the 
  

   base. 
  Fore 
  and 
  middle 
  femora 
  but 
  little 
  more 
  gibbous 
  in 
  the 
  male 
  

   than 
  in 
  the 
  female; 
  hind 
  femora 
  not 
  very 
  long, 
  the 
  hind 
  tibiae 
  Avith 
  ten 
  

   spines 
  on 
  the 
  outer 
  side. 
  Margin 
  of 
  subgenital 
  plate 
  of 
  male 
  straight 
  

   from 
  the 
  base, 
  which 
  is 
  not 
  ampliate, 
  a 
  little 
  elevated 
  at 
  the 
  apex; 
  

   cerci 
  styliform, 
  about 
  as 
  long 
  as 
  the 
  supraaual 
  plate, 
  the 
  furcula 
  nearly 
  

   obsolete. 
  

  

  The 
  genus 
  is 
  confined 
  so 
  far 
  as 
  known 
  to 
  Mexico 
  and 
  Central 
  America. 
  

  

  AIDEMONA 
  AZTECA. 
  

  

  (Plate 
  IV, 
  fig. 
  1.) 
  

  

  PlaUjphyma 
  azieca 
  Saussure, 
  Eev. 
  Mag. 
  Zool., 
  1861 
  (1861), 
  p. 
  161; 
  Orth. 
  Nov. 
  

   Amer., 
  II 
  (1861), 
  p. 
  12.— 
  Walkeu, 
  Cat. 
  Uerm. 
  Salt. 
  Brit. 
  Mus., 
  IV 
  (1870), 
  

   p. 
  716.— 
  Thomas, 
  Rep. 
  U. 
  S. 
  Geol. 
  Surv. 
  Terr., 
  V 
  (1873), 
  p. 
  223. 
  

  

  PezoietUx 
  aziecus 
  Stal, 
  Bih. 
  K. 
  Sv. 
  Vet.-Akad. 
  HaiulL, 
  V 
  (1878), 
  No. 
  9, 
  p. 
  10. 
  

  

  Aidemona 
  azieca 
  Bkuxxer, 
  Rev. 
  Sj-st. 
  Ortb. 
  (1893) 
  p. 
  145. 
  

  

  Brownish 
  fuscous 
  above, 
  sometimes 
  deepening 
  to 
  blackish 
  fuscous, 
  

   especially 
  on 
  the 
  upper 
  half 
  of 
  the 
  lateral 
  lobes 
  of 
  the 
  prouotum, 
  testa- 
  

   ceous 
  below, 
  often 
  deeply 
  infuscated. 
  Head 
  mostly 
  testaceous, 
  heavily 
  

   punctate 
  throughout 
  excepting 
  on 
  the 
  vertex, 
  where 
  the 
  i)uncta 
  are 
  

   obscure 
  and 
  subdued, 
  and 
  where 
  the 
  color 
  is 
  dark; 
  fastigium 
  with 
  more 
  

   or 
  less 
  elevated 
  but 
  rounded 
  lateral 
  walls; 
  frontal 
  costa 
  slightly 
  

   widened 
  just 
  above 
  the 
  ocellus; 
  antennae 
  testaceous, 
  more 
  or 
  less 
  

   infuscated, 
  especially 
  toward 
  apex. 
  Pronotum 
  heavily 
  and 
  almost 
  

   equally 
  punctate 
  throughout, 
  both 
  on 
  dorsum 
  and 
  lateral 
  lobes, 
  but 
  less 
  

   crowded 
  on 
  the 
  posterior 
  half 
  of 
  the 
  lateral 
  lobes 
  of 
  the 
  prozona, 
  and 
  

   with 
  a 
  small, 
  free, 
  glabrous 
  patch 
  above 
  on 
  either 
  half 
  of 
  the 
  prozona; 
  

   lower 
  half 
  of 
  the 
  lateral 
  lobes 
  testaceous, 
  in 
  greater 
  or 
  less 
  contrast 
  to 
  

   the 
  blackish 
  upper 
  half, 
  the 
  darker 
  portion 
  widening 
  on 
  the 
  metazona; 
  

   bilt 
  while 
  this 
  feature 
  is 
  sometimes 
  very 
  marked, 
  in 
  specimens 
  in 
  which 
  

   the 
  testaceous 
  under 
  surface 
  becomes 
  Havous, 
  it 
  is 
  sometimes 
  scarcely 
  

   to 
  be 
  detected, 
  so 
  infuscated 
  may 
  the 
  lower 
  half 
  become. 
  Tegmina 
  

   far 
  surpassing 
  the 
  abdomen, 
  rather 
  slender, 
  well 
  rounded 
  apically, 
  

   griseous 
  from 
  a 
  profuse 
  and 
  rather 
  minute 
  fuscous 
  flecking 
  on 
  a 
  semi- 
  

   pellucid 
  base, 
  the 
  hecking 
  more 
  or 
  less 
  continent 
  in 
  the 
  basal 
  third; 
  

  

  