﻿The 
  British 
  Species 
  of 
  Andrena 
  and 
  Nomada. 
  291 
  

  

  following 
  segments 
  bearing 
  short 
  dense 
  pale 
  hairs, 
  

  

  forming 
  bands 
  flavipes. 
  

  

  (Ventral 
  segments 
  without 
  highly 
  specialised 
  ciliations.) 
  

  

  111. 
  (110) 
  Abdomen 
  red-marked, 
  nearly 
  glabrous 
  to 
  the 
  naked 
  eye. 
  

  

  florea. 
  

   (Ventral 
  segments 
  Avith 
  highly 
  speciahsed 
  apical 
  cilia- 
  

   tions. 
  ) 
  

  

  112. 
  (97) 
  Third 
  antennal 
  joint 
  evidently 
  shorter 
  than 
  4th 
  and 
  5th 
  

  

  together, 
  often 
  very 
  much 
  shorter. 
  

  

  113. 
  (llSffl) 
  Legs 
  and 
  face 
  both 
  with 
  black 
  hairs. 
  . 
  . 
  thoracica. 
  

   113a. 
  (113) 
  Legs 
  and 
  face 
  not 
  both 
  with 
  black 
  hairs. 
  

  

  114. 
  (117) 
  Clypeus 
  with 
  white 
  hairs, 
  1st 
  and 
  disc 
  at 
  least 
  of 
  2nd 
  

  

  segment 
  with 
  long 
  or 
  longish 
  pubescence, 
  apices 
  of 
  

   3rd 
  and 
  4th 
  segments 
  without 
  short 
  hairs 
  forming 
  

   pale 
  lateral 
  streaks. 
  

   (Species 
  large 
  in 
  normal 
  specimens.) 
  

  

  115. 
  (116) 
  Thorax 
  with 
  fulvous 
  hairs 
  in 
  fresh 
  examples; 
  hind 
  tibiae 
  

  

  fringed 
  with 
  pale 
  hairs 
  above 
  nitida. 
  

  

  116. 
  (115) 
  Thorax 
  with 
  white 
  or 
  whitish 
  hairs, 
  generally 
  mixed 
  

  

  with 
  black 
  ; 
  hind 
  tibiae 
  with 
  black 
  hairs. 
  cineraria. 
  

  

  117. 
  (114) 
  If 
  the 
  clypeus 
  is 
  white-haired 
  the 
  2nd 
  abdominal 
  segment 
  

  

  is 
  glabrous 
  (or 
  bears 
  only 
  very 
  short 
  or 
  few 
  hairs) 
  on 
  

   the 
  disc;- 
  abdomen 
  in 
  some 
  species 
  with 
  distinct 
  pale 
  

   fasciae 
  or 
  lateral 
  streaks 
  of 
  short 
  hairs 
  on 
  the 
  2nd 
  

   and 
  following 
  segments. 
  

  

  118. 
  (121) 
  Clypeus 
  never 
  white-haired, 
  often 
  clothed 
  largely 
  or 
  

  

  wholly 
  with 
  black; 
  if 
  covered 
  with 
  brown 
  or 
  fulvous 
  

   hairs 
  the 
  2nd 
  abdominal 
  segment 
  has 
  conspicuous 
  long 
  

   hairs 
  on 
  the 
  middle. 
  

  

  119. 
  (120) 
  Mandibles 
  in 
  apical 
  view 
  of 
  the 
  face 
  with 
  the 
  tips 
  crossing 
  

  

  when 
  closed, 
  3rd 
  antennal 
  joint 
  seen 
  from 
  in 
  front 
  

   under 
  a 
  strong 
  lens, 
  without 
  distinct 
  projecting 
  hairs 
  

   beneath 
  nigroaenea. 
  

  

  120. 
  (119) 
  Mandibles 
  in 
  apical 
  view 
  not 
  forming 
  a 
  cross 
  at 
  the 
  

  

  tips, 
  when 
  closed; 
  3rd 
  antennal 
  joint 
  under 
  a 
  strong 
  

   lens 
  with 
  distinct 
  short 
  black 
  hairs 
  projecting 
  in 
  the 
  

   arch 
  beneath 
  gwynana. 
  

  

  121. 
  (118) 
  Clypeus 
  in 
  some 
  species 
  white-haired, 
  never 
  black- 
  

  

  haired 
  ; 
  when 
  clothed 
  with 
  brown 
  or 
  fulvous 
  ones 
  the 
  

   2nd 
  segment 
  bears 
  only 
  short 
  hairs 
  in 
  the 
  middle 
  or 
  

   may 
  appear 
  nearly 
  glabrous 
  there. 
  

  

  122. 
  (123) 
  Clypeus 
  with 
  white 
  hairs, 
  those 
  on 
  the 
  sides 
  of 
  the 
  face 
  

  

  bordering 
  it, 
  as 
  is 
  easily 
  seen 
  in 
  lateral 
  view, 
  are 
  

   black 
  ruficrus. 
  

  

  