﻿290 
  Mr. 
  E. 
  C. 
  L. 
  Perkins 
  on 
  

  

  (A 
  small 
  species 
  with 
  the 
  lower 
  occipital 
  angles 
  strongly 
  

   produced 
  backwards, 
  the 
  clypeus 
  abnormal, 
  its 
  apical 
  

   margin 
  strongly 
  reflexed 
  or 
  upturned, 
  and 
  behind 
  this 
  

   flattened 
  (or 
  impressed) 
  smooth 
  and 
  shining.) 
  

  

  96. 
  (95) 
  Sides 
  of 
  head 
  behind 
  the 
  eyes 
  normal. 
  

  

  97. 
  (112) 
  Third 
  joint 
  of 
  antennae 
  as 
  long 
  as 
  the 
  two 
  following 
  

  

  together 
  and 
  about 
  twice 
  as 
  long 
  as 
  its 
  apical 
  width, 
  

   or 
  still 
  longer 
  in 
  some 
  species. 
  

  

  98. 
  (99) 
  A 
  small 
  or 
  rather 
  small 
  species, 
  the 
  apices 
  of 
  the 
  apical 
  

  

  impressions 
  of 
  the 
  abdominal 
  segments 
  2-4 
  with 
  dense 
  

   white 
  fasciae, 
  their 
  general 
  surface 
  practically 
  glabrous, 
  

   except 
  for 
  very 
  minute 
  hairs 
  argentata. 
  

  

  99. 
  (98) 
  Abdomen 
  with 
  long 
  hairs 
  on 
  some 
  of 
  these 
  segments 
  or 
  

  

  without 
  dense 
  white 
  fasciae. 
  

  

  100. 
  (101) 
  Abdomen 
  imder 
  a 
  strong 
  lens 
  dull, 
  minutely 
  rugulose 
  

  

  all 
  over, 
  the 
  puncturation 
  effaced, 
  clothed 
  all 
  over 
  

  

  with 
  long 
  hairs 
  clarhella. 
  

  

  (Mandibles 
  long, 
  crossing 
  at 
  tips; 
  lower 
  posterior 
  angle 
  

   of 
  the 
  head 
  behind 
  the 
  eyes 
  in 
  lateral 
  view 
  subrect- 
  

   angular, 
  at 
  most 
  a 
  little 
  rounded 
  off.) 
  

  

  101. 
  (100) 
  Abdomen 
  either 
  more 
  or 
  less 
  shining 
  or 
  considerably 
  

  

  punctured 
  or 
  both. 
  

  

  102. 
  (109) 
  Clypeus 
  with 
  white 
  hairs, 
  at 
  most 
  very 
  slightly 
  tinged 
  

  

  with 
  yellow; 
  abdomen 
  without 
  red 
  markings. 
  

  

  103. 
  (104) 
  A 
  large 
  species, 
  the 
  thorax 
  clothed 
  with 
  white 
  or 
  whitish 
  

  

  hairs, 
  the 
  abdomen 
  shining 
  nearly 
  glabrous 
  and 
  

   impunctate 
  above, 
  and 
  without 
  special 
  apical 
  ciUation 
  

   of 
  its 
  segments 
  beneath 
  vaga. 
  

  

  104. 
  (103) 
  Abdomen 
  clothed 
  with 
  a 
  good 
  deal 
  of 
  pubescence 
  or 
  

  

  punctured 
  or 
  both. 
  

  

  105. 
  (106) 
  Head 
  seen 
  from 
  above 
  deeply 
  emarginate, 
  its 
  lower 
  

  

  angles 
  strongly 
  and 
  subacutely 
  produced, 
  but 
  the 
  

   angles 
  themselves 
  are 
  rounded 
  off. 
  . 
  . 
  angustior. 
  

  

  106. 
  (105) 
  Head 
  ordinarily 
  emarginate. 
  

  

  107. 
  (108) 
  Basal 
  abdominal 
  segment 
  polished, 
  generally 
  with 
  some 
  

  

  shallow, 
  often 
  ill-defined, 
  longitudinal 
  fluting 
  on 
  its 
  

   apical 
  portion; 
  ventral 
  segments 
  with 
  apical 
  bands 
  

   of 
  dense 
  white 
  cilia 
  sericea. 
  

  

  108. 
  (107) 
  Basal 
  segment 
  punctured; 
  ventral 
  segments 
  with 
  long 
  

  

  fine 
  hairs 
  and 
  no 
  conspicuous 
  apical 
  ciliation. 
  

  

  fasciata. 
  

  

  109. 
  (102) 
  Clypeus 
  with 
  distinctly 
  yellow, 
  brown 
  or 
  black 
  hairs 
  or 
  

  

  with 
  these 
  mixed. 
  

  

  110. 
  (Ill) 
  Abdomen 
  black, 
  the 
  apical 
  impressions 
  of 
  the 
  2nd 
  and 
  

  

  