﻿The 
  British 
  Species 
  of 
  Andrena 
  and 
  Nomada. 
  305 
  

  

  117. 
  (116) 
  Face 
  with 
  many 
  pale 
  hairs 
  especially 
  in 
  the 
  antennal 
  

  

  region 
  trimmerana 
  K. 
  2nd 
  brood. 
  

  

  118. 
  (115) 
  Abdomen 
  black, 
  at 
  most 
  with 
  the 
  apices 
  of 
  some 
  of 
  the 
  

  

  segments 
  a 
  Uttle 
  discoloured 
  or 
  pallid 
  ; 
  scopae 
  generally 
  

   silvery 
  white 
  beneath. 
  

  

  119. 
  (120) 
  Face 
  more 
  or 
  less 
  considerably 
  clothed 
  with 
  pale 
  hairs; 
  

  

  the 
  pale 
  hairs 
  of 
  the 
  abdomen 
  not 
  confined 
  to 
  the 
  

   first 
  two 
  segments. 
  . 
  trimmerana 
  Auct. 
  nee 
  Kirby. 
  

  

  120. 
  (119) 
  Face 
  entirely 
  or 
  almost 
  entirely 
  clothed 
  with 
  black 
  or 
  

  

  blackish 
  fuscous 
  hairs; 
  abdomen 
  behind 
  the 
  2nd 
  

   segment 
  clothed 
  with 
  black 
  hair. 
  

  

  trimmerana 
  Auct. 
  var. 
  scotica. 
  

  

  Table 
  of 
  ,^ 
  Nomada. 
  

  

  1. 
  (2) 
  Labrum 
  black, 
  the 
  mandibles 
  bidentate 
  at 
  apex. 
  

  

  fabriciana. 
  

   (Abdomen 
  normally 
  with 
  two 
  pairs 
  of 
  small 
  lateral 
  yellow 
  

   spots.) 
  

  

  2. 
  (1) 
  If 
  the 
  labrum 
  is 
  black 
  the 
  mandibles 
  are 
  simple 
  at 
  the 
  apex. 
  

  

  3. 
  (6) 
  Abdomen 
  without 
  any 
  yellow 
  or 
  white 
  markings, 
  labrum 
  

  

  black. 
  

   (Medium 
  -sized 
  or 
  rather 
  small 
  species 
  with 
  short 
  antennae, 
  

   many 
  of 
  the 
  flagellar 
  joints 
  produced 
  into 
  a^ 
  minute 
  

   tubercle 
  behind 
  ; 
  abdomen, 
  especially 
  towards 
  the 
  sides, 
  

   with 
  silvery 
  pubescence, 
  very 
  noticeable 
  in 
  some 
  

   aspects.) 
  

  

  4. 
  (5) 
  Hind 
  femora 
  beneath 
  for 
  the 
  greater 
  part 
  dull 
  and 
  densely 
  

  

  punctured 
  and 
  pubescent 
  germanica. 
  

  

  (Flagellum 
  of 
  antennae 
  pale 
  beneath.) 
  

  

  5. 
  (4) 
  Hind 
  femora 
  beneath 
  for 
  the 
  most 
  part 
  pohshed 
  and 
  

  

  glabrous, 
  very 
  little 
  pimctured 
  except 
  at 
  the 
  extreme 
  

  

  base 
  atrata. 
  

  

  (Flagellum 
  dark 
  or 
  infuscate 
  beneath.) 
  

  

  6. 
  (3) 
  Abdomen 
  with 
  at 
  least 
  small 
  lateral 
  yellow 
  spots 
  on 
  one 
  

  

  or 
  more 
  of 
  the 
  basal 
  segments, 
  often 
  conspicuously 
  

   spotted 
  or 
  banded. 
  

  

  7. 
  (8) 
  Species 
  large 
  (8'5-ll 
  mm. 
  long) 
  labrum 
  black, 
  armed 
  with 
  

  

  a 
  strong 
  median 
  triangular 
  tooth 
  anteriorly, 
  3rd 
  antennal 
  

  

  joint 
  beneath 
  as 
  long 
  as 
  the 
  4th 
  armata. 
  

  

  (Front 
  femora 
  dilated, 
  the 
  basal 
  half 
  or 
  more 
  in 
  front 
  

   occupied 
  by 
  a 
  great 
  ovate 
  impression; 
  hind 
  femora 
  

   at 
  the 
  extreme 
  base 
  beneath 
  clothed 
  jjosteriorly 
  with 
  

   long 
  curved 
  hairs, 
  much 
  longer 
  than 
  those 
  on 
  the 
  tro- 
  

   chanter 
  ; 
  adjoining 
  this, 
  with 
  an 
  area 
  very 
  densely 
  clothed 
  

   TRANS. 
  ENT. 
  SOC. 
  LOND. 
  1919. 
  — 
  PARTS 
  I, 
  II. 
  (JULY) 
  X 
  

  

  