﻿244 
  Mr. 
  R. 
  C. 
  L. 
  Perkins 
  on 
  

  

  brood 
  like 
  its 
  host. 
  In 
  N. 
  Wiltshire 
  one 
  or 
  two 
  individuals 
  

   of 
  a 
  second 
  brood 
  were 
  found 
  only 
  in 
  certain 
  seasons. 
  

   This 
  Nomada 
  probably 
  parasitises 
  also 
  both 
  A. 
  nigroaenea 
  

   and 
  angustior, 
  so 
  that, 
  where 
  all 
  the 
  hosts 
  occur, 
  one 
  may 
  

   find 
  an 
  abundance 
  of 
  the 
  parasite 
  in 
  the 
  freshest 
  condition 
  

   in 
  April, 
  and 
  then 
  in 
  May 
  and 
  the 
  first 
  part 
  of 
  June 
  there 
  

   appears 
  another 
  abundant 
  supply 
  of 
  fresh 
  specimens 
  of 
  

   both 
  sexes, 
  mixed 
  with 
  old 
  ones, 
  mostly 
  $$, 
  of 
  the 
  early 
  

   issue. 
  In 
  July 
  the 
  true 
  second 
  brood 
  appears, 
  this 
  genera- 
  

   tion 
  appearing 
  conspicuously 
  darker 
  in 
  colour 
  than 
  the 
  

   spring 
  form, 
  when 
  a 
  series 
  of 
  each 
  is 
  placed 
  side 
  by 
  side. 
  

  

  In 
  some 
  localities 
  stylopised 
  gwynana 
  are 
  not 
  very 
  

   infrequent, 
  and 
  those 
  that 
  I 
  have 
  noticed 
  have 
  mostly 
  

   been 
  examples 
  of 
  the 
  second 
  brood. 
  Westwood, 
  however, 
  

   found 
  the 
  spring 
  brood 
  stylopised 
  commonly 
  at 
  Oxford. 
  

  

  A. 
  ruficrus 
  is 
  a 
  northern 
  species 
  and 
  was 
  first 
  made 
  

   known 
  as 
  British 
  from 
  some 
  males 
  captured 
  in 
  Perthshire 
  

   in 
  1899. 
  Just 
  at 
  the 
  time 
  it 
  was 
  brought 
  forward, 
  I 
  

   discovered 
  two 
  or 
  three 
  females 
  amongst 
  some 
  old 
  Hymeno- 
  

   ptera 
  and 
  miscellaneous 
  insects 
  collected 
  in 
  Yorkshire 
  

   and 
  mixed 
  with 
  A. 
  fucata 
  and 
  other 
  common 
  northern 
  

   species. 
  In 
  the 
  north-west 
  of 
  Europe 
  it 
  occurs 
  in 
  early 
  

   spring 
  on 
  Salix, 
  dandelions 
  and 
  coltsfoot. 
  In 
  most 
  places 
  

   where 
  it 
  is 
  found 
  the 
  small 
  parasite 
  Nomada 
  obscura 
  Zett. 
  

   is 
  taken 
  with 
  it, 
  but 
  as 
  a 
  rule 
  only 
  in 
  small 
  numbers. 
  It 
  

   should 
  certainly 
  be 
  looked 
  for 
  in 
  the 
  northern 
  localities 
  

   where 
  the 
  Andrena 
  occurs 
  with 
  us. 
  

  

  A. 
  angustior, 
  though 
  a 
  rather 
  local 
  and 
  inconspicuous 
  

   species, 
  is 
  very 
  widely 
  distributed 
  in 
  the 
  southern 
  counties, 
  

   and 
  in 
  many 
  places 
  is 
  abundant. 
  It 
  is 
  found 
  in 
  the 
  north 
  

   of 
  England 
  also. 
  It 
  visits 
  dandelions 
  and 
  other 
  yellow 
  

   Compositae, 
  and 
  in 
  some 
  localities 
  collects 
  much 
  pollen 
  

   from 
  Veronica. 
  At 
  Oxford 
  I 
  found 
  it 
  numerously 
  on 
  

   Ranuncidus, 
  and 
  wherever 
  it 
  occurs 
  the 
  (^(J 
  will 
  be 
  seen 
  

   flying 
  round 
  the 
  blue 
  hyacinth 
  flowers, 
  if 
  these 
  are 
  present, 
  

   though 
  rarely 
  setthng 
  on 
  them. 
  Allium, 
  Bellis, 
  Ewphorhia 
  

   and 
  Crataegus 
  are 
  all 
  attractive 
  in 
  one 
  locality 
  or 
  another, 
  

   and 
  it 
  is 
  occasionally 
  taken 
  on 
  white 
  Umbelliferae. 
  Nor- 
  

   mally 
  it 
  appears 
  in 
  May 
  and 
  continues 
  in 
  good 
  condition 
  

   into 
  June, 
  but 
  in 
  some 
  years 
  it 
  appears 
  in 
  April, 
  and 
  fresh 
  

   examples 
  of 
  A. 
  gwynana 
  may 
  be 
  taken 
  on 
  the 
  same 
  day. 
  

   On 
  the 
  other 
  hand, 
  in 
  some 
  seasons 
  it, 
  or 
  at 
  least 
  the 
  $, 
  

   may 
  be 
  taken 
  in 
  good 
  condition 
  in 
  company 
  with 
  the 
  

   second 
  brood 
  of 
  gwynana 
  ! 
  

  

  