﻿314 
  Mr. 
  R. 
  C. 
  L. 
  Perkins 
  on 
  

  

  the 
  series 
  of 
  spines 
  slender 
  and 
  elongate, 
  the 
  outer 
  ones 
  

   much 
  shorter 
  and 
  stouter.) 
  

  

  39. 
  (38) 
  Mandibles 
  not 
  truncate 
  at 
  apex. 
  

  

  40. 
  (45) 
  Mesonotum 
  black, 
  without 
  red 
  lines 
  or 
  markings. 
  

  

  41. 
  (42) 
  Prothoracic 
  tubercles 
  bright 
  yellow. 
  . 
  . 
  xanthosticta. 
  

  

  (Spots 
  of 
  2nd 
  abdominal 
  segment 
  lateral, 
  the 
  two 
  together 
  

   in 
  dorsal 
  aspect 
  not 
  usually 
  as 
  long 
  as 
  the 
  distance 
  

   between 
  them 
  ; 
  they 
  are 
  said 
  to 
  be 
  very 
  rarely 
  obsolete. 
  ) 
  

  

  42. 
  (41) 
  Prothoracic 
  tubercles 
  not 
  bright 
  yellow. 
  

  

  43. 
  (44) 
  Mesonotum 
  with 
  a 
  general 
  clothing 
  of 
  longish 
  erect 
  

  

  pubescence 
  similar 
  to 
  that 
  on 
  the 
  front 
  of 
  the 
  head. 
  

  

  levcophthalma. 
  

  

  (Spots 
  of 
  2nd 
  segment 
  rarely 
  separated 
  by 
  a 
  distance 
  

  

  greater 
  than 
  the 
  length 
  of 
  one 
  of 
  them 
  and 
  often 
  by 
  less. 
  ) 
  

  

  44. 
  (43) 
  Mesonotum 
  with 
  short 
  and 
  scanty 
  pubescence. 
  

  

  ruficornis 
  ab. 
  

  

  45. 
  (40) 
  Mesonotum 
  with 
  red 
  lines 
  or 
  markings. 
  

  

  46. 
  (55) 
  Spots 
  of 
  2nd 
  abdominal 
  segment 
  not 
  minute, 
  together 
  

  

  in 
  dorsal 
  aspect 
  they 
  are 
  usually 
  at 
  least 
  as 
  long 
  as 
  

   one-third 
  the 
  width 
  of 
  the 
  segment, 
  or 
  the 
  segment 
  

   may 
  have 
  a 
  complete 
  band. 
  

  

  47. 
  (48) 
  Mesonotum 
  clothed 
  with 
  longish 
  erect 
  pubescence 
  like 
  

  

  that 
  on 
  the 
  front 
  of 
  the 
  head. 
  . 
  . 
  hucophihahna 
  var. 
  

  

  48. 
  (47) 
  Mesonotum 
  with 
  short 
  and 
  scanty 
  hair 
  except 
  at 
  the 
  

  

  extreme 
  front. 
  

  

  49. 
  (50) 
  Spots 
  of 
  2nd 
  abdominal 
  segment 
  lateral, 
  the 
  chstance 
  

  

  between 
  them, 
  greater 
  than 
  the 
  length 
  of 
  one 
  of 
  them 
  

   in 
  dorsal 
  aspect; 
  antennae 
  unusually 
  long 
  and 
  slender, 
  

   the 
  flagellar 
  joints 
  behind 
  with 
  a 
  thin 
  fringe 
  of 
  erect 
  

   hairs, 
  quite 
  distinct. 
  bucephalae. 
  

  

  50. 
  (49) 
  Colour 
  of 
  2nd 
  segment 
  very 
  variable, 
  often 
  with 
  entire 
  or 
  

  

  almost 
  entire 
  band 
  ; 
  if 
  with 
  remote 
  spots 
  as 
  in 
  bucephalae, 
  

   the 
  antennae 
  are 
  shorter 
  and 
  their 
  fringe 
  is 
  very 
  sparse 
  

   or 
  indistinct. 
  

  

  51. 
  (52) 
  Second 
  and 
  following 
  segments 
  with 
  entire 
  broad 
  yellow 
  

  

  bands, 
  that 
  on 
  the 
  2nd 
  not 
  notably 
  excised 
  in 
  the 
  middle 
  

   of 
  its 
  upper 
  margin; 
  area 
  of 
  black 
  on 
  the 
  posterior 
  

   two-thirds 
  of 
  mesonotum 
  greater 
  than 
  that 
  of 
  red 
  

  

  colour 
  signata. 
  

  

  (Propodeum 
  usually 
  with 
  a 
  large 
  trilobed 
  yellow 
  spot.) 
  

  

  52. 
  (51) 
  Second 
  and 
  following 
  segments 
  rarely 
  all 
  with 
  wide 
  com- 
  

  

  plete 
  bands 
  as 
  in 
  signata, 
  and 
  if 
  so, 
  the 
  posterior 
  two- 
  

   thirds 
  of 
  the 
  mesonotum 
  is 
  more 
  red 
  than 
  black. 
  

  

  53. 
  (54) 
  Wings 
  hght 
  shining 
  fuscous, 
  yellow-tinged, 
  flagellum 
  

  

  