﻿296 
  Mr. 
  R. 
  C. 
  L. 
  Perkins 
  on 
  

  

  fasciae 
  of 
  short 
  hairs 
  on 
  the 
  apical 
  margins, 
  the 
  hind 
  

   tibiae 
  abnormally 
  wide 
  at 
  the 
  apex 
  and 
  with 
  dense 
  

  

  short 
  scopal 
  fringe 
  above 
  dorsata. 
  

  

  (The 
  scutellar-post-scutellar 
  region 
  very 
  densely 
  hairy, 
  the 
  

   hairs 
  on 
  each 
  side 
  of 
  the 
  propodeum 
  forming 
  a 
  pollen 
  

   basket 
  almost 
  completely 
  closed 
  in 
  and 
  more 
  perfect 
  

   than 
  in 
  any 
  other 
  species.) 
  

  

  16. 
  (15) 
  When 
  the 
  abdomen 
  is 
  as 
  above, 
  the 
  tibiae 
  are 
  normal 
  in 
  

  

  shape 
  and 
  the 
  scopal 
  fringe 
  long. 
  

  

  17. 
  (26) 
  General 
  surface 
  of 
  the 
  abdomen 
  glabrous, 
  basal 
  segment 
  

  

  never 
  polished 
  between 
  the 
  punctures, 
  but 
  rugulose 
  

   under 
  a 
  strong 
  lens, 
  the 
  2nd, 
  3rd, 
  and 
  4th 
  segments 
  

   with 
  a 
  pattern 
  formed 
  by 
  dense, 
  narrow 
  apical 
  bands 
  

   or 
  lateral 
  streaks 
  of 
  pale 
  hairs, 
  and 
  covered 
  with 
  fine, 
  

   shallow 
  punctures 
  ; 
  these 
  bands 
  are 
  formed 
  only 
  on 
  the 
  

   hind 
  margin 
  of 
  the 
  apical 
  impressions 
  of 
  the 
  segments. 
  

   Scopae 
  yellow 
  or 
  golden. 
  

   (Floccus 
  of 
  hind 
  trochanters 
  perfect.) 
  

  

  18. 
  (19) 
  Hind 
  tibiae 
  wholly 
  or 
  for 
  the 
  most 
  part 
  dark. 
  

  

  ovatula 
  var. 
  fuscata. 
  

  

  19. 
  (18) 
  Hind 
  tibiae 
  clear 
  yellowish. 
  

  

  20. 
  (21)* 
  Scutellum 
  posteriorly 
  and 
  post-scutellum 
  very 
  densely 
  

  

  clothed 
  with 
  bright 
  brown 
  hairs 
  (in 
  fresh 
  examples) 
  

   hardly 
  less 
  densely 
  than 
  at 
  the 
  sides 
  of 
  the 
  former. 
  

  

  similis. 
  

   (Apical 
  band 
  of 
  3rd 
  abdominal 
  segment 
  always 
  widely 
  

   broken, 
  appressed 
  hairs 
  of 
  5th 
  segment 
  always 
  golden, 
  

   wings 
  fulvescent.) 
  

  

  21. 
  (20) 
  Clothing 
  of 
  hind 
  margin 
  of 
  scutellum 
  and 
  that 
  of 
  the 
  

  

  post-scutellum 
  not 
  miusually 
  dense, 
  less 
  dense 
  than 
  that 
  

   at 
  the 
  sides 
  of 
  the 
  former. 
  

  

  22. 
  (23) 
  Appressed 
  hairs 
  of 
  5th 
  segment 
  fuscous 
  or 
  sordid, 
  ovatula. 
  

  

  23. 
  (22) 
  Appressed 
  hairs 
  of 
  5th 
  segment 
  golden. 
  

  

  24. 
  (25) 
  Wings 
  clear 
  or 
  almost 
  clear 
  hyaline 
  ; 
  band 
  of 
  3rd 
  abdominal 
  

  

  segment 
  entire 
  in 
  fresh 
  examples. 
  . 
  . 
  . 
  ovatula 
  var. 
  

  

  25. 
  (24) 
  Wings 
  subf 
  ulvescent 
  ; 
  band 
  of 
  3rd 
  segment 
  broken 
  in 
  the 
  

  

  middle 
  wilkella. 
  

  

  26. 
  (17) 
  Species 
  with 
  a 
  glabrous 
  abdomen 
  and 
  a 
  distinct 
  pattern 
  

  

  of 
  narrow 
  bands 
  or 
  streaks, 
  as 
  described 
  in 
  17, 
  have 
  

   the 
  surface 
  of 
  the 
  basal 
  segment 
  shining 
  between 
  the 
  

   punctures 
  or 
  lack 
  the 
  dense 
  puncturation. 
  

  

  * 
  Although 
  this 
  and 
  the 
  following 
  species 
  are 
  distinguishable 
  in 
  

   worn 
  examples 
  by 
  slight 
  differences 
  in 
  sculpture, 
  etc., 
  I 
  am 
  unable 
  

   to 
  satisfactorily 
  tabulate 
  them 
  on 
  these 
  characters. 
  

  

  