﻿The 
  British 
  Species 
  of 
  Andrena 
  and 
  Nomada. 
  241 
  

  

  dandelions. 
  It 
  is, 
  I 
  believe, 
  only 
  single 
  -brooded, 
  but 
  in 
  

   Smith's 
  collection 
  there 
  is 
  a 
  curious 
  stylopised 
  $ 
  (which 
  

   he 
  wrongly 
  considered 
  to 
  represent 
  Kirby's 
  Mouffetella) 
  

   taken 
  in 
  Hampshire 
  in 
  the 
  month 
  of 
  July 
  1840. 
  I 
  know 
  

   of 
  no 
  other 
  summer 
  emergence 
  nor 
  of 
  any 
  other 
  case 
  of 
  

   stylopisation. 
  

  

  A. 
  nitida 
  is 
  a 
  very 
  widely 
  distributed 
  species, 
  which 
  

   generally 
  is 
  more 
  abundant 
  in 
  meadowland 
  and 
  cultivated 
  

   country 
  than 
  in 
  wilder 
  districts, 
  but 
  I 
  have 
  not 
  myself 
  

   collected 
  in 
  any 
  part 
  of 
  the 
  south 
  of 
  England, 
  where 
  it 
  

   does 
  not 
  occur. 
  It 
  visits 
  many 
  different 
  flowers, 
  but 
  is 
  

   perhaps 
  particularly 
  attached 
  to 
  the 
  dandelion. 
  It 
  visits 
  

   Salix 
  and 
  Pnmus, 
  as 
  do 
  most 
  spring 
  Andrenas, 
  also 
  Bellis, 
  

   Brassica, 
  holly, 
  Cotoneaster, 
  Ranunculus, 
  Veronica, 
  various 
  

   fruit-trees, 
  e.g., 
  cherry 
  and 
  raspberry, 
  and 
  Cruciferous 
  

   plants. 
  On 
  all 
  these 
  I 
  have 
  seen 
  it 
  commonly, 
  and 
  some- 
  

   times 
  it 
  may 
  be 
  seen 
  on 
  the 
  white 
  dead-nettle. 
  I 
  have 
  

   never 
  known 
  of 
  a 
  specimen 
  of 
  a 
  second 
  brood, 
  although 
  the 
  

   species 
  often 
  reaches 
  maturity 
  in 
  its 
  burrow 
  before 
  winter. 
  

  

  It 
  does 
  not 
  appear 
  to 
  be 
  very 
  subject 
  to 
  parasites, 
  

   though 
  I 
  believe 
  Nmnada 
  goodeniana, 
  (succincta) 
  is 
  sup- 
  

   posed 
  to 
  attack 
  it. 
  I 
  have 
  not 
  been 
  able 
  to 
  satisfy 
  myself 
  

   as 
  to 
  this, 
  and 
  one 
  field 
  of 
  large 
  acreage, 
  throughout 
  which 
  

   the 
  burrows 
  of 
  nitida 
  were 
  dispersed, 
  never 
  yielded 
  a 
  

   parasite 
  during 
  several 
  years' 
  search, 
  although 
  the 
  above- 
  

   named 
  Nomada 
  was 
  very 
  common 
  in 
  the 
  district, 
  infesting 
  

   A. 
  nigroaenea. 
  Still 
  nitida 
  is 
  a 
  very 
  probable 
  host 
  of 
  this 
  

   Nomada. 
  Stylopised 
  specimens 
  are 
  quite 
  rare 
  or 
  at 
  

   least 
  excessively 
  local. 
  This 
  species 
  is 
  very 
  widely 
  dis- 
  

   tributed 
  and 
  occurs 
  in 
  the 
  north 
  of 
  England 
  and 
  in 
  Ireland. 
  

  

  A. 
  thoracica 
  is 
  more 
  local 
  than 
  the 
  preceding 
  and 
  in 
  the 
  

   south 
  is 
  regularly 
  double-brooded. 
  The 
  first 
  brood 
  is 
  

   found 
  freely 
  on 
  Salix 
  and 
  Prunus, 
  and 
  is 
  also 
  partial 
  to 
  

   dandelions 
  and 
  to 
  cabbage 
  and 
  mustard 
  flowers. 
  The 
  

   second 
  brood 
  is 
  generally 
  found 
  on 
  Rubus 
  and 
  pink 
  thistles. 
  

   Unhke 
  nitida, 
  it 
  frequently 
  forms 
  large 
  compact 
  colonies. 
  

   One 
  colony 
  found 
  by 
  my 
  children 
  in 
  a 
  hard-trodden 
  sheep- 
  

   track 
  on 
  the 
  edge 
  of 
  Dartmoor 
  appeared 
  to 
  consist 
  of 
  

   only 
  this 
  species, 
  and 
  fine 
  large 
  specimens 
  of 
  Nomada 
  

   goodeniana 
  were 
  taken 
  entering 
  the 
  burrows. 
  Otherwise 
  

   the 
  pure 
  colonies 
  of 
  this 
  species 
  that 
  I 
  have 
  examined 
  

   seemed 
  to 
  be 
  free 
  from 
  these 
  parasites, 
  and 
  it 
  is, 
  of 
  course, 
  

   possible 
  that 
  in 
  the 
  case 
  mentioned 
  there 
  may 
  have 
  been 
  

   burrows 
  of 
  the 
  ubiquitous 
  nigroaenea 
  mixed 
  with 
  the 
  

  

  TRANS. 
  ENT. 
  SOC. 
  LOND. 
  1919. 
  — 
  PARTS 
  I, 
  II. 
  (jULY) 
  R 
  

  

  