﻿The 
  British 
  Species 
  of 
  Andrena 
  and 
  Nomada. 
  259 
  

  

  feeding, 
  on 
  ground-ivy 
  or 
  bugle, 
  if 
  these 
  happen 
  to 
  be 
  grow- 
  

   ing 
  there, 
  as 
  well 
  as 
  on 
  daisies 
  and 
  Veronica. 
  The 
  females 
  

   also 
  visit 
  these 
  plants, 
  and 
  also 
  trefoil 
  and 
  clovers, 
  and 
  

   they 
  collect 
  great 
  loads 
  of 
  yellow 
  pollen 
  from 
  the 
  flowers 
  

   of 
  JJlex. 
  Various 
  papilionaceous 
  plants 
  attract 
  them. 
  No 
  

   Nomada 
  appears 
  to 
  breed 
  in 
  their 
  burrows, 
  nor 
  have 
  I 
  been 
  

   able 
  to 
  secure 
  a 
  single 
  stylopised 
  * 
  example, 
  although, 
  

   according 
  to 
  Alfken, 
  this 
  is 
  one 
  of 
  the 
  species 
  of 
  Andrena 
  

   most 
  subject 
  to 
  attack 
  in 
  Germany. 
  

  

  A. 
  ovatula, 
  better 
  known 
  as 
  afzeliella, 
  is 
  by 
  no 
  means 
  of 
  

   universal 
  distribution, 
  but 
  is 
  widely 
  distributed 
  in 
  the 
  

   neighbourhood 
  of 
  London, 
  and 
  abundant 
  in 
  many 
  counties, 
  

   where 
  there 
  is 
  heath 
  land 
  with 
  a 
  gravelly 
  or 
  sandy 
  soil. 
  

   It 
  is 
  not 
  partial 
  to 
  meadowland 
  and 
  highly 
  cultivated 
  

   districts 
  \^^th 
  heavy 
  soils. 
  It 
  difiers 
  both 
  from 
  the 
  preced- 
  

   ing 
  and 
  the 
  following 
  species 
  in 
  being 
  frequently 
  and 
  in 
  

   some 
  counties, 
  e. 
  g., 
  Devonshire 
  and 
  Hampshire, 
  regularly 
  

   double-brooded, 
  but 
  it 
  is 
  not 
  certain 
  whether 
  it 
  has 
  not 
  

   a 
  special 
  single-brooded 
  race, 
  which 
  appears 
  between 
  the 
  

   two 
  others. 
  It 
  visits 
  the 
  same 
  flowers 
  as 
  A. 
  similis, 
  but 
  

   appearing 
  earher 
  is 
  also 
  taken 
  on 
  Salix 
  and 
  on 
  blackthorn. 
  

   The 
  second 
  brood 
  is 
  extremely 
  fond 
  of 
  Calluna, 
  gathering 
  

   pollen 
  from 
  this 
  often 
  in 
  company 
  with 
  A. 
  fuscipes, 
  and 
  

   is 
  sometimes 
  numerous 
  on 
  Ononis. 
  This 
  Andrena 
  is 
  not 
  

   subject 
  to 
  the 
  attacks 
  of 
  Nomada 
  in 
  this 
  country, 
  but 
  it 
  is 
  

   sometimes 
  stylopised, 
  much 
  less 
  frequently, 
  however, 
  in 
  

   my 
  experience 
  than 
  A. 
  wilkella. 
  Most 
  of 
  the 
  supposed 
  

   stylopised 
  afzeliella 
  I 
  have 
  seen 
  belong 
  to 
  the 
  other 
  species, 
  

   but 
  I 
  have 
  bred 
  the 
  (^ 
  Stylops 
  from 
  the 
  present 
  one 
  as 
  well. 
  

  

  The 
  variation 
  in 
  this 
  species 
  is 
  of 
  an 
  unusual 
  kind 
  in 
  

   that 
  the 
  hind 
  tibiae 
  of 
  the 
  female 
  may 
  be 
  either 
  clear 
  yellow, 
  

   hke 
  those 
  of 
  its 
  close 
  allies, 
  which 
  never 
  vary, 
  or 
  entirely 
  

   black. 
  This 
  last 
  form 
  was 
  named 
  /wscato 
  by 
  Kirby 
  (before 
  

   he 
  described 
  his 
  afzeliella), 
  and 
  it 
  is 
  found 
  in 
  both 
  broods. 
  

   Both 
  names, 
  however, 
  are 
  preceded 
  by 
  ovatula 
  K., 
  which 
  

   is 
  the 
  t^ 
  of 
  afzeliella. 
  

  

  Saunders 
  merely 
  tells 
  us 
  that 
  afzeliella 
  is 
  widely 
  distri- 
  

   buted, 
  but 
  I 
  do 
  not 
  possess 
  any 
  northern 
  examples 
  myself, 
  

   though 
  one 
  would 
  expect 
  it 
  to 
  occur 
  in 
  both 
  Scotland 
  and 
  

   Ireland. 
  The 
  following 
  species, 
  however, 
  occurs 
  in 
  the 
  

   north 
  and 
  the 
  two 
  are 
  not 
  always 
  accurately 
  separated 
  

   by 
  collectors. 
  

  

  * 
  Since 
  this 
  was 
  written 
  a 
  stylopised 
  ^ 
  has 
  been 
  taken. 
  

  

  