﻿The 
  British 
  Species 
  of 
  Andrena 
  and 
  Nomada. 
  303 
  

  

  95. 
  (89) 
  Basal 
  abdominal 
  segment 
  not 
  polished, 
  but 
  with 
  fine 
  

  

  rugnlose 
  sculpture 
  imder 
  a 
  strong 
  lens, 
  so 
  that 
  the 
  

   surface 
  is 
  opaque 
  or 
  subopaque; 
  5th 
  antennal 
  joint 
  

   generally 
  distinctly 
  elongate, 
  very 
  rarely 
  appearing 
  

   about 
  square 
  in 
  outline 
  and 
  never 
  very 
  short. 
  

  

  96. 
  (110) 
  Floccus 
  large 
  and 
  absolutely 
  perfect. 
  

  

  96a. 
  (97) 
  Scopae 
  entirely 
  black 
  as 
  also 
  the 
  curved 
  hairs 
  at 
  the 
  

   sides 
  of 
  the 
  propodeum. 
  Abdomen 
  very 
  densely 
  clothed 
  

   with 
  beautiful 
  fulvous 
  hairs 
  which 
  in 
  fresh 
  examples 
  

   are 
  of 
  a 
  paler 
  colour 
  than 
  those 
  of 
  the 
  thorax. 
  . 
  fulva. 
  

  

  97. 
  (96a) 
  Scopae 
  always 
  pale 
  beneath. 
  

  

  98. 
  (99) 
  Apical 
  impressions 
  of 
  3rd 
  and 
  4th 
  abdominal 
  segments 
  

  

  abnormal, 
  only 
  defined 
  at 
  the 
  sides 
  and 
  widely 
  obliter- 
  

   ated 
  in 
  the 
  middle, 
  but 
  their 
  position 
  can 
  be 
  distin- 
  

   guished 
  (best 
  when 
  the 
  insect 
  is 
  viewed 
  from 
  behind 
  

   with 
  its 
  head 
  downwards) 
  by 
  a 
  row 
  of 
  fine 
  piliferous 
  

   punctures, 
  and 
  they 
  are 
  then 
  seen 
  to 
  be 
  extraordinarily 
  

   wide 
  in 
  this 
  part, 
  occupying 
  nearly 
  the 
  whole 
  segments 
  

   if 
  these 
  are 
  moderately 
  extended, 
  or 
  the 
  whole 
  if 
  they 
  

   are 
  at 
  all 
  strongly 
  contracted. 
  

   (Punctures 
  of 
  clypeus 
  for 
  the 
  most 
  part 
  sparse 
  or 
  irregular, 
  

   and 
  often 
  with 
  ill-defined 
  outHnes 
  ; 
  colour 
  of 
  abdominal 
  

   pubescence 
  variable, 
  the 
  two 
  basal 
  segments 
  with 
  fulvous 
  

   hairs, 
  the 
  two 
  following 
  sometimes 
  both 
  with 
  dark 
  or 
  

   both 
  with 
  pale 
  (whitish 
  or 
  partly 
  fulvous 
  and 
  partly 
  

   white) 
  pubescence) 
  synadelpha. 
  

  

  99. 
  (98) 
  Apical 
  impressions 
  of 
  3rd 
  and 
  4th 
  segments 
  often 
  feeble 
  

  

  and 
  sometimes 
  narrowly 
  obUterated 
  in 
  the 
  middle; 
  but 
  

   their 
  position 
  is 
  still 
  discernible 
  in 
  some 
  aspects, 
  when 
  

   they 
  are 
  seen 
  to 
  be 
  not 
  of 
  extraordinary 
  width. 
  In 
  

   some 
  species 
  they 
  are 
  quite 
  distinct 
  throughout, 
  though 
  

   shallow. 
  

  

  100. 
  (103) 
  Hairs 
  on 
  the 
  middle 
  and 
  hind 
  coxae 
  more 
  or 
  less 
  sordid 
  

  

  in 
  colour, 
  not 
  clear 
  white 
  nor 
  pale 
  ochreous 
  (face 
  

   often, 
  but 
  not 
  always, 
  with 
  black 
  or 
  sooty 
  hairs). 
  

  

  101. 
  (102) 
  First 
  and 
  2nd 
  segments 
  of 
  the 
  abdomen 
  very 
  densely 
  

  

  haired 
  in 
  part, 
  the 
  surface 
  on 
  the 
  basal 
  middle 
  part 
  

   of 
  the 
  2nd 
  hidden 
  by 
  the 
  dense 
  covering, 
  imless 
  the 
  

   specimen 
  is 
  abraded. 
  The 
  abdomen 
  dull, 
  from 
  the 
  

   close, 
  minute 
  sculpture 
  and 
  dense 
  pubescence. 
  

  

  varians. 
  

  

  102. 
  (101) 
  First 
  and 
  2nd 
  segments 
  with 
  a 
  thin 
  clothing 
  of 
  long 
  fine 
  

  

  hairs, 
  abdomen 
  distinctly 
  shining 
  to 
  the 
  naked 
  eye. 
  

  

  lapponica. 
  

  

  