﻿262 
  Mr. 
  R. 
  C. 
  L. 
  Perkins 
  on 
  

  

  Malva, 
  also 
  white 
  Umbelliferae 
  and 
  others. 
  It 
  is 
  parasi- 
  

   tised 
  by 
  N. 
  obtusifrons, 
  but 
  not, 
  I 
  think, 
  by 
  tormentillae. 
  

   At 
  any 
  rate, 
  where 
  we 
  have 
  found 
  A. 
  coitana 
  and 
  tarsata 
  

   together, 
  the 
  last-named 
  Notnada 
  was 
  certainly 
  attached 
  to 
  

   the 
  latter, 
  and 
  was 
  not 
  seen 
  at 
  the 
  burrows 
  of 
  the 
  former. 
  

  

  A. 
  hattorfiana 
  is 
  widely 
  distributed 
  in 
  the 
  more 
  southern 
  

   counties, 
  but 
  local, 
  and 
  by 
  no 
  means 
  always 
  common, 
  where 
  

   it 
  does 
  occur. 
  In 
  the 
  east 
  it 
  has 
  been 
  found 
  numerously 
  in 
  

   Kent, 
  and 
  has 
  occurred 
  at 
  Colchester 
  and 
  near 
  Norwich; 
  

   in 
  the 
  Isle 
  of 
  Wight, 
  Dorsetshire, 
  Devonshire 
  (where 
  it 
  is 
  

   widely 
  distributed 
  but 
  local 
  and 
  in 
  some 
  localities 
  and 
  

   places 
  few 
  in 
  numbers) 
  and 
  various 
  localities 
  in 
  Cornwall, 
  

   in 
  S. 
  Wales 
  and 
  near 
  Oxford. 
  Its 
  favourite 
  flower 
  seems 
  

   to 
  be 
  Knautia, 
  but 
  it 
  also 
  visits 
  Scabiosa, 
  and 
  will 
  hardly 
  

   ever 
  be 
  seen 
  on 
  any 
  other 
  plant 
  than 
  these, 
  or 
  on 
  the 
  first 
  

   one 
  only. 
  The 
  red 
  -marked 
  varieties 
  are 
  said 
  to 
  be 
  abundant 
  

   on 
  the 
  east 
  coast 
  in 
  some 
  seasons, 
  but 
  in 
  Devonshire 
  are 
  

   extremely 
  rare; 
  near 
  Oxford 
  less 
  so. 
  

  

  Nomada 
  armata 
  is 
  parasitic 
  on 
  this 
  species 
  and 
  also 
  

   frequents 
  the 
  same 
  flowers. 
  Judging 
  from 
  the 
  fact 
  that 
  

   Smith, 
  who 
  found 
  this 
  Andrena 
  so 
  abundantly 
  on 
  the 
  

   east 
  coast, 
  hardly 
  obtained 
  any 
  of 
  the 
  parasite 
  there, 
  and 
  

   Saunders 
  none 
  at 
  all, 
  it 
  would 
  appear 
  to 
  be 
  imexpectedly 
  

   rare 
  there, 
  but 
  otherwise 
  it 
  seems 
  generally 
  to 
  occur 
  more 
  

   or 
  less 
  freely 
  in 
  nearly 
  all 
  the 
  districts 
  recorded 
  for 
  its 
  host. 
  

   Yet 
  it 
  will 
  not 
  be 
  found 
  with 
  every 
  colony, 
  even 
  though 
  

   these 
  are 
  of 
  long 
  standing. 
  Once 
  I 
  saw 
  it 
  really 
  numerous 
  

   in 
  S. 
  Devon 
  in 
  a 
  large 
  pasture 
  field 
  sprinkled 
  over 
  with 
  

   scattered 
  plants 
  of 
  scabious, 
  where 
  it 
  was 
  flying 
  strongly 
  

   in 
  a 
  brisk 
  wind 
  from 
  plant 
  to 
  plant, 
  but 
  not 
  setthng 
  on 
  the 
  

   swaying 
  flowers. 
  Being 
  occupied 
  in 
  sahnon 
  fishing 
  and 
  with- 
  

   out 
  a 
  net 
  I 
  was 
  miable 
  to 
  secure 
  even 
  a 
  smgle 
  specimen, 
  and 
  

   though 
  I 
  knocked 
  down 
  and 
  so 
  obtained 
  some 
  of 
  the 
  Andrena, 
  

   the 
  harder 
  Nomada 
  was 
  not 
  to 
  be 
  thus 
  stimned. 
  When, 
  in 
  

   another 
  year, 
  I 
  was 
  able 
  to 
  revisit 
  the 
  spot, 
  the 
  field 
  had 
  been 
  

   ploughed 
  up 
  and 
  planted 
  with 
  corn. 
  

  

  A. 
  marginata 
  in 
  its 
  habits 
  is 
  very 
  similar 
  to 
  the 
  preceding, 
  

   being 
  most 
  partial 
  to 
  and 
  often 
  found 
  only 
  on 
  the 
  common 
  

   scabious, 
  but 
  I 
  have 
  taken 
  it 
  on 
  Centaurea 
  and 
  frequently 
  

   on 
  the 
  devils-bit 
  scabious, 
  and 
  Hallett 
  took 
  the 
  (^ 
  J 
  on 
  

   Lapsana. 
  Not 
  infrequently 
  it 
  is 
  found 
  in 
  company 
  with 
  

   hattorfiana, 
  being 
  similarly 
  local. 
  I 
  have 
  seen 
  specimens 
  

   only 
  from 
  the 
  more 
  southern 
  counties, 
  where 
  it 
  occurs 
  in 
  

   Cambridge, 
  Essex, 
  Suffolk, 
  Norfolk, 
  Kent, 
  Surrey, 
  Berks, 
  

  

  