﻿276 
  Mr. 
  R. 
  C. 
  L. 
  Perkins 
  on 
  

  

  species 
  is 
  shining 
  beneath, 
  in 
  fulvago 
  remarkably 
  so. 
  The 
  

   3rd 
  joint 
  of 
  the 
  antennae 
  is 
  subequal 
  to 
  or 
  else 
  much 
  

   longer 
  than 
  the 
  4th. 
  The 
  abdomen 
  has 
  a 
  very 
  distinct 
  

   puncturation, 
  and 
  the 
  basal 
  segment 
  is 
  shining 
  or 
  polished. 
  

   The 
  females 
  have 
  very 
  large 
  yellow 
  scopae 
  of 
  plumose 
  

   hairs, 
  and 
  the 
  appressed 
  hairs 
  of 
  the 
  5th 
  segment 
  of 
  the 
  

   abdomen 
  are 
  entirely 
  yellow 
  or 
  golden. 
  The 
  floccus 
  is 
  

   perfect 
  in 
  form. 
  As 
  in 
  the 
  ^, 
  the 
  abdomen 
  is 
  shining, 
  the 
  

   2nd 
  segment 
  practically 
  glabrous, 
  except 
  at 
  the 
  sides, 
  and 
  

   densely 
  and 
  distinctly 
  punctured. 
  

  

  Group 
  of 
  A. 
  WILKELLA. 
  

  

  Excluding 
  the 
  aberrant 
  species 
  A. 
  dorsata, 
  the 
  members 
  

   of 
  this 
  group 
  are 
  easily 
  recognised 
  and 
  closely 
  alhed 
  to 
  

   one 
  another. 
  The 
  males 
  are 
  commonplace 
  in 
  structure 
  

   with 
  short 
  mandibles 
  resting 
  one 
  on 
  the 
  other, 
  and 
  not 
  

   forming 
  a 
  cross 
  at 
  the 
  tips. 
  The 
  head 
  has 
  no 
  pecuharities 
  

   of 
  form, 
  and 
  the 
  tubercle 
  of 
  the 
  labrum 
  is 
  ordinary. 
  The 
  

   3rd 
  antennal 
  joint 
  is 
  at 
  most 
  rather 
  longer 
  or 
  rather 
  shorter 
  

   than 
  the 
  4th, 
  never 
  approaching 
  the 
  length 
  of 
  4 
  and 
  5 
  

   united 
  in 
  any 
  of 
  our 
  species. 
  The 
  4th 
  is 
  more 
  or 
  less 
  

   elongate, 
  an 
  important 
  character 
  to 
  distinguish 
  the 
  males 
  

   from 
  some 
  others 
  in 
  which 
  this 
  joint 
  is 
  either 
  transverse 
  

   or 
  just 
  as 
  long 
  as 
  wide. 
  The 
  abdomen 
  is 
  rugulose 
  all 
  

   over, 
  with 
  very 
  feebly 
  impressed 
  punctures, 
  the 
  basal 
  

   segment 
  never 
  smooth 
  and 
  polished 
  between 
  these, 
  2nd 
  

   segment 
  with 
  only 
  very 
  short 
  hairs 
  on 
  the 
  middle 
  parts, 
  

   the 
  ventral 
  segments 
  with 
  long 
  apical 
  ciha. 
  The 
  propo- 
  

   deum 
  is 
  well 
  clothed 
  with 
  long 
  hairs 
  except 
  on 
  the 
  anterior 
  

   area, 
  itself. 
  Male 
  genital 
  armature 
  commonplace, 
  the 
  

   inner 
  angles 
  of 
  the 
  lobes 
  of 
  the 
  stipites 
  are 
  not 
  notably 
  

   produced, 
  and 
  the 
  sagittae 
  basally 
  are 
  not 
  dilated 
  from 
  a 
  

   rounding 
  of 
  their 
  sides. 
  

  

  The 
  appearance 
  of 
  the 
  females 
  is 
  more 
  distinctive 
  in 
  

   this 
  small 
  group, 
  the 
  general 
  surface 
  of 
  the 
  abdomen 
  

   almost 
  glabrous, 
  and 
  bearing 
  dense 
  narrow 
  bands 
  (some- 
  

   times 
  widely 
  interrupted 
  in 
  the 
  middle) 
  of 
  short 
  white 
  or 
  

   almost 
  white 
  hairs 
  on 
  the 
  apical 
  margins 
  of 
  the 
  inter- 
  

   mediate 
  segments. 
  The 
  sculpture 
  is 
  as 
  described 
  for 
  the 
  

   males, 
  and 
  the 
  band 
  of 
  the 
  2nd 
  segment 
  is 
  never 
  entire. 
  

   Floccus 
  perfectly 
  developed 
  over 
  the 
  whole 
  trochanter. 
  

  

  A. 
  dorsata 
  is 
  in 
  a 
  wide 
  sense 
  a 
  member 
  of 
  this 
  group, 
  

   but 
  were 
  we 
  considering 
  foreign 
  species 
  it 
  might 
  well 
  be 
  

   separated 
  therefrom 
  as 
  a 
  subgroup. 
  Closely 
  alhed 
  species 
  

  

  