﻿The 
  British 
  Species 
  of 
  Andrena 
  and 
  Nomada. 
  307 
  

  

  16. 
  (15) 
  Scutellum 
  rarely 
  with 
  a 
  single 
  red 
  marking 
  (often 
  with 
  

  

  2 
  red 
  or 
  yellow 
  spots 
  or 
  all 
  black) 
  if 
  with 
  a 
  single 
  large 
  

   red 
  marking 
  the 
  3rd 
  antennal 
  joint 
  beneath 
  is 
  much 
  

   shorter 
  than 
  the 
  4th. 
  

  

  17. 
  (18) 
  A 
  somewhat 
  robust 
  black 
  and 
  yellow 
  (bicoloured) 
  species, 
  

  

  with 
  the 
  apical 
  margin 
  of 
  hind 
  tibiae 
  without 
  distinct 
  

  

  spines 
  or 
  fringe 
  flavopicta, 
  

  

  (Labrum 
  and 
  front 
  of 
  scape 
  yellow 
  or 
  pale, 
  the 
  antennae 
  

   practically 
  all 
  black 
  above; 
  thorax 
  clothed 
  only 
  with 
  

   very 
  short 
  hairs 
  and 
  with 
  two 
  large 
  round 
  yellow 
  spots 
  

   on 
  the 
  scutellum 
  ; 
  front 
  and 
  middle 
  femora 
  without 
  a 
  

   fringe 
  beneath; 
  yellow 
  spots 
  on 
  each 
  side 
  of 
  2nd 
  and 
  

   3rd 
  segments 
  of 
  abdomen 
  widely 
  separated.) 
  

  

  18. 
  (17) 
  Apical 
  margin 
  of 
  hind 
  tibiae 
  above 
  with 
  spines 
  or 
  con- 
  

  

  spicuous 
  fringe 
  or 
  both; 
  many 
  species 
  have 
  tricoloured 
  

   abdomen. 
  

  

  19. 
  (20) 
  A 
  large 
  robust 
  bicoloured 
  species, 
  the 
  3rd 
  antennal 
  joint 
  

  

  viewed 
  from 
  beneath 
  (or 
  in 
  front) 
  as 
  long 
  as 
  the 
  4th. 
  

  

  G-fasciata. 
  

   (Cheeks 
  longer 
  than 
  in 
  any 
  other 
  species, 
  the 
  face 
  produced 
  

   anteriorly; 
  hind 
  tarsi 
  unusually 
  thick, 
  the 
  2nd 
  joint 
  

   seen 
  on 
  the 
  outer 
  side 
  not 
  much 
  longer 
  than 
  wide, 
  front 
  

   and 
  middle 
  femora 
  with 
  long 
  fringe 
  beneath, 
  the 
  apical 
  

   margin 
  of 
  hind 
  tibiae 
  with 
  well-developed 
  fringe 
  ; 
  yellow 
  

   spots 
  of 
  2nd 
  abdominal 
  segment 
  wedge-shaped 
  and 
  well 
  

   separated; 
  flagellar 
  joints 
  of 
  the 
  antennae 
  shining 
  

   .. 
  beneath 
  and 
  in 
  some 
  aspects 
  showing 
  a 
  narrow 
  pale 
  

   pubescent 
  band 
  at 
  the 
  base.) 
  

  

  20. 
  (19) 
  Such 
  species 
  as 
  are 
  bicolorous 
  have 
  the 
  3rd 
  antennal 
  joint 
  

  

  distinctly 
  shorter 
  than 
  the 
  4th, 
  when 
  viewed 
  from 
  in 
  

   front 
  or 
  beneath. 
  

  

  21. 
  (24) 
  Hind 
  femora 
  at 
  the 
  extreme 
  base 
  beneath 
  with 
  a 
  highly 
  

  

  specialised 
  area 
  clothed 
  with 
  extremely 
  dense 
  and 
  short 
  

   hairs 
  and 
  entirely 
  different 
  from 
  the 
  rest 
  of 
  the 
  surface, 
  

   the 
  'trochanters 
  with 
  a 
  dense 
  fringe 
  or 
  tuft 
  of 
  longer 
  

   hairs. 
  

  

  22. 
  (23) 
  Basal 
  abdominal 
  segment 
  bicoloured, 
  the 
  basal 
  joints 
  of 
  

  

  the 
  flagellum 
  of 
  antennae 
  posteriorly 
  black-marked. 
  

  

  goodeniana. 
  

  

  23. 
  (22) 
  Basal 
  abdominal 
  segment 
  tricoloured, 
  basal 
  and 
  apical 
  

  

  joints 
  of 
  flagellum 
  pale 
  behind, 
  some 
  of 
  the 
  intermediate 
  

   ones 
  with 
  black 
  markings 
  fucaUt. 
  

  

  24. 
  (21) 
  Hind 
  femora 
  and 
  trochanters 
  not 
  thus 
  clothed. 
  

  

  25. 
  (26) 
  The 
  flagellar 
  joints 
  of 
  the 
  antennae 
  seen 
  with 
  a 
  strong 
  lens 
  

  

  