﻿The 
  British 
  Species 
  of 
  Andrena 
  and 
  Nomada. 
  315 
  

  

  unicolorous, 
  fulvous 
  in 
  front 
  and 
  behind; 
  minute 
  hairs 
  

   on 
  propodeum 
  and 
  on 
  the 
  hind 
  coxae 
  flavescent. 
  flava. 
  

  

  54. 
  (53) 
  Wings 
  more 
  grey, 
  the 
  flagellum 
  usually 
  with 
  at 
  least 
  one 
  

  

  or 
  two 
  of 
  the 
  more 
  apical 
  joints 
  infuscated 
  in 
  front; 
  

   minute 
  hairs 
  of 
  propodeum 
  and 
  coxae 
  silvery 
  white. 
  

  

  ruficornis. 
  

  

  55. 
  (46) 
  Spots 
  of 
  2nd 
  segment 
  minute, 
  together 
  in 
  dorsal 
  aspect 
  

  

  not 
  occupying 
  one-thiid 
  of 
  the 
  width 
  of 
  the 
  segment, 
  

   sometimes 
  they 
  are 
  wanting. 
  . 
  . 
  . 
  flavoguttata 
  ab. 
  

   (Labrum 
  red, 
  the 
  propodeum 
  with 
  a 
  tuft 
  or 
  patch 
  of 
  silvery 
  

   hair 
  on 
  each 
  side 
  above 
  the 
  insertion 
  of 
  the 
  abdomen.) 
  

  

  56. 
  (25) 
  Labrum 
  black, 
  or 
  the 
  species 
  is 
  very 
  minute 
  and 
  without 
  

  

  distinct 
  flavous 
  abdominal 
  markings. 
  

  

  57. 
  (60) 
  Labrum 
  black, 
  3rd 
  antennal 
  joint 
  beneath 
  shorter 
  than 
  

  

  the 
  4th. 
  

  

  58. 
  (59) 
  Propodeum 
  with 
  a 
  conspicuous 
  patch 
  or 
  tuft 
  of 
  silvery 
  

  

  hair 
  on 
  each 
  side 
  posteriorly; 
  large 
  red 
  marking 
  of 
  the 
  

   mesopleura 
  approaching 
  near 
  the 
  red 
  spot 
  beneath 
  the 
  

   insertion 
  of 
  the 
  wings, 
  or 
  coalescing 
  with 
  this. 
  

  

  flavoguttata. 
  

  

  59. 
  (58) 
  Propodeum 
  often 
  entirely 
  without 
  a 
  tuft 
  of 
  hair 
  or 
  with 
  

  

  this 
  comparatively 
  less 
  developed; 
  the 
  red 
  mesopleural 
  

   spot 
  beneath 
  the 
  wings 
  is 
  widely 
  separated 
  from 
  the 
  

   longitudinal 
  red 
  line 
  or 
  band 
  beneath 
  it. 
  . 
  conjungens. 
  

   (This 
  species 
  is 
  very 
  closely 
  allied 
  to 
  flavoguttata, 
  but 
  is 
  of 
  

   larger 
  average 
  size 
  and 
  has 
  the 
  yellow 
  abdominal 
  sjiot" 
  

   larger 
  in 
  normal 
  examples.) 
  

  

  60. 
  (57) 
  Labrum 
  red, 
  the 
  3rd 
  antennal 
  joint 
  not 
  shorter 
  beneath 
  

  

  than 
  the 
  4th 
  furva. 
  

  

  (A 
  very 
  minute 
  species, 
  the 
  abdomen 
  without 
  definite 
  

   flavous 
  spots 
  and 
  with 
  a 
  dense 
  and 
  conspicuous 
  tuft 
  of 
  

   silvery 
  hair 
  on 
  each 
  side 
  of 
  the 
  propodeum.) 
  

  

  The 
  three 
  species 
  obtusifrons, 
  tormentillae 
  {roberjeotiana 
  

   Sm. 
  Saund.) 
  and 
  rufipes 
  form 
  a 
  quite 
  distinct 
  group, 
  the 
  

   (^ 
  genital 
  armature 
  and 
  8th 
  ventral 
  segment 
  being 
  very 
  

   different 
  from 
  those 
  of 
  any 
  other. 
  I 
  should 
  consider 
  

   flavopicta 
  as 
  somewhat 
  allied 
  to 
  the 
  latter, 
  but 
  the 
  alliance 
  

   is 
  very 
  remote. 
  

  

  N 
  . 
  germanica 
  and 
  airata 
  are 
  allied 
  to 
  one 
  another, 
  but 
  

   not 
  close 
  to 
  any 
  other 
  species 
  ; 
  armata 
  and 
  guUulata 
  are 
  

   both 
  isolated, 
  and 
  I 
  do 
  not 
  think 
  the 
  latter 
  is 
  really 
  at 
  all 
  

   closely 
  allied 
  to 
  hillana. 
  The 
  large 
  species 
  N. 
  sexfasciata 
  

   parasitic 
  on 
  Eiicera 
  has 
  no 
  close 
  ally 
  in 
  this 
  country, 
  nor 
  

  

  