﻿The 
  British 
  Species 
  of 
  Andrena 
  and 
  Nomada. 
  281 
  

  

  above 
  the 
  tibiae 
  shorter 
  and 
  denser 
  than 
  in 
  marginata, 
  

   the 
  fioccus 
  perfect. 
  

  

  Abdomen 
  in 
  both 
  sexes 
  pohshed, 
  finely 
  and 
  remotely 
  

   pmictured, 
  scopae 
  and 
  appressed 
  hairs 
  of 
  5th 
  segment 
  in 
  

   the 
  $ 
  clear 
  golden. 
  

  

  A. 
  cingulata 
  is 
  entirely 
  distinct 
  in 
  facies 
  from 
  any 
  other 
  

   of 
  the 
  genus, 
  the 
  pattern 
  of 
  colour 
  and 
  dense 
  even 
  punc- 
  

   turation 
  of 
  the 
  abdominal 
  segments 
  being 
  distinctive. 
  In 
  

   the 
  (^ 
  the 
  head, 
  together 
  with 
  the 
  labrum 
  and 
  mandibles, 
  

   is 
  not 
  at 
  all 
  modified; 
  the 
  latter 
  when 
  closed 
  rest 
  one 
  

   on 
  the 
  other. 
  

  

  The 
  genital 
  armature 
  is 
  very 
  large 
  and 
  remarkable, 
  the 
  

   lobes 
  of 
  the 
  stipites 
  only 
  touching 
  for 
  a 
  small 
  space, 
  the 
  

   inner 
  apical 
  angles 
  rounded 
  off 
  and 
  receding, 
  the 
  processes 
  

   in 
  dorsal 
  view 
  divergent 
  at 
  their 
  apices 
  with 
  an 
  obliquely 
  

   truncate 
  or 
  very 
  faintly 
  rounded 
  margin, 
  forming 
  an 
  

   apical 
  acute 
  angle. 
  

  

  In 
  the 
  $ 
  the 
  floccus 
  is 
  perfect, 
  the 
  surface 
  of 
  the 
  pro- 
  

   podeum 
  above 
  well 
  exposed, 
  the 
  abdomen 
  almost 
  glabrous, 
  

   though 
  dull. 
  

  

  A. 
  humilis. 
  Head 
  and 
  tubercle 
  of 
  labrum 
  ordinary 
  in 
  

   the 
  (J, 
  the 
  mandibles 
  resting 
  one 
  on 
  the 
  other 
  to 
  the 
  apex. 
  

   Propodeum 
  above 
  (adjoining 
  the 
  anterior 
  area) 
  with 
  long 
  

   pubescence. 
  Abdomen 
  conspicuously 
  pubescent 
  to 
  the 
  

   naked 
  eye, 
  without 
  special 
  pattern, 
  the 
  basal 
  segment 
  

   with 
  notably 
  granular 
  puncturation. 
  Genital 
  armature 
  

   with 
  the 
  inner 
  apical 
  angle 
  very 
  strongly 
  produced, 
  forming 
  

   long 
  subdivergent 
  processes. 
  

  

  Female 
  with 
  the 
  basal 
  abdominal 
  segment 
  at 
  least 
  

   towards 
  the 
  sides 
  with 
  granular 
  punctures, 
  no 
  distinct 
  

   abdominal 
  pattern 
  formed 
  by 
  the 
  pubescence, 
  5th 
  and 
  

   6th 
  segments 
  with 
  golden 
  hairs. 
  Hind 
  tibiae 
  with 
  long 
  

   scopal 
  fringe 
  of 
  evidently 
  plumose 
  hairs 
  above, 
  the 
  scopae 
  

   large 
  and 
  golden, 
  the 
  floccus 
  perfect, 
  of 
  plumose 
  hairs 
  

   throughout. 
  

  

  A. 
  lahialis.. 
  Not 
  related 
  to 
  any 
  other 
  of 
  the 
  species 
  

   with 
  white 
  clypeus 
  and 
  should 
  probably 
  be 
  placed 
  closer 
  

   to 
  the 
  group 
  of 
  nigroaenea 
  with 
  the 
  larger 
  species 
  of 
  which 
  

   and 
  to 
  that 
  oi 
  flavipes 
  it 
  shows 
  affinity. 
  Head 
  of 
  (^, 
  and 
  

   tubercle 
  of 
  labrum 
  ordinary, 
  the 
  mandibles 
  resting 
  one 
  on 
  

   the 
  other, 
  not 
  forming 
  a 
  cross 
  at 
  the 
  apex. 
  Genital 
  arma- 
  

   ture 
  with 
  the 
  inner 
  angle 
  of 
  the 
  lobes 
  of 
  stipites 
  not 
  pro- 
  

   duced, 
  nearly 
  rectangular, 
  the 
  lobes 
  polished, 
  not 
  rugulose 
  

   as 
  in 
  the 
  flavipes 
  group. 
  Eighth 
  ventral 
  segment 
  with 
  its 
  

  

  