﻿308 
  Mr. 
  R. 
  C. 
  L. 
  Perkins 
  

  

  on 
  

  

  have 
  small 
  but 
  conspicuous 
  tubercles 
  behind, 
  projecting 
  

  

  like 
  small 
  thorns 
  lathburiana. 
  

  

  (A 
  tricoloured 
  species 
  of 
  good 
  size, 
  the 
  middle 
  femora 
  

   without 
  a 
  distinct 
  fringe 
  beneath, 
  the 
  hind 
  ones 
  shining 
  

   beneath, 
  copiously 
  punctate, 
  the 
  punctures 
  irregular 
  in 
  

   size 
  ; 
  3rd 
  joint 
  of 
  antennae 
  seen 
  from 
  beneath 
  as 
  long 
  

   as 
  the 
  4th.) 
  

  

  26. 
  (25) 
  Antennae 
  not 
  conspicuously 
  tuberculate. 
  

  

  27. 
  (30) 
  Abdomen 
  black 
  and 
  yellow, 
  bicoloured 
  to 
  the 
  naked 
  eye, 
  

  

  the 
  scape 
  of 
  the 
  antennae 
  pale 
  in 
  front 
  or 
  with 
  pale 
  area. 
  

  

  28. 
  (29) 
  Third 
  antennal 
  joint 
  viewed 
  from 
  in 
  front 
  very 
  short 
  on 
  

  

  the 
  lower 
  side, 
  its 
  length 
  there 
  being 
  shorter 
  than 
  the 
  

   same 
  side 
  of 
  the 
  5th 
  joint 
  lineola. 
  

  

  29. 
  (28) 
  Third 
  antennal 
  joint, 
  viewed 
  as 
  above, 
  with 
  the 
  lower 
  side 
  

  

  about 
  equal 
  to 
  that 
  of 
  the 
  5th. 
  . 
  . 
  . 
  marshamella. 
  

   (These 
  two 
  species 
  vary 
  in 
  important 
  characters, 
  but 
  the 
  

   shape 
  of 
  the 
  apical 
  margin 
  of 
  the 
  hind 
  tibiae 
  seen 
  dor- 
  

   sally 
  from 
  the 
  base 
  is 
  different. 
  Most 
  examples 
  have 
  

   a 
  different 
  facies 
  from 
  the 
  fact 
  that 
  the 
  yellow 
  spots 
  

   of 
  the 
  2nd 
  abdominal 
  segment 
  of 
  marshamella 
  are 
  

   usually 
  blunt 
  or 
  truncate 
  on 
  their 
  inner 
  extremity. 
  

   The 
  colour 
  of 
  the 
  tegulae 
  and 
  prothoracic 
  tubercles 
  

   vary, 
  in 
  some 
  examples 
  the 
  relative 
  length 
  of 
  the 
  

   antennal 
  joints 
  does 
  not 
  greatly 
  differ 
  in 
  these 
  species.) 
  

  

  30. 
  (27) 
  Abdomen 
  definitely 
  brown 
  or 
  ferruginous 
  in 
  part 
  or 
  the 
  

  

  scape 
  is 
  black 
  in 
  front. 
  

  

  31. 
  (32) 
  Mandibles 
  distinctly 
  bifid 
  at 
  the 
  apex 
  bifida. 
  

  

  (Species 
  of 
  the 
  same 
  size 
  and 
  resembUng 
  in 
  general 
  colora- 
  

   tion 
  some 
  varieties 
  of 
  ruficornis, 
  flava 
  and 
  signata.) 
  

  

  32. 
  (31) 
  Mandibles 
  not 
  bifid. 
  

  

  32a. 
  (57) 
  Third 
  joint 
  of 
  antennae 
  viewed 
  from 
  in 
  front 
  much 
  

   shorter 
  than 
  the 
  4th; 
  species 
  seldom 
  excessively 
  small. 
  

  

  33. 
  (56) 
  Labrum 
  pale 
  at 
  least 
  to 
  a 
  considerable 
  extent. 
  

  

  34. 
  (43) 
  Scape 
  of 
  antennae 
  black 
  in 
  front 
  as 
  well 
  as 
  behind 
  (or 
  

  

  above). 
  

  

  35. 
  (40) 
  Scutellum 
  black, 
  not 
  marked 
  with 
  red. 
  

  

  36. 
  (37) 
  Tubercles 
  of 
  pronotum 
  black 
  with 
  a 
  sulphur 
  yellow 
  hind 
  

  

  margin 
  xanthosticta. 
  

  

  37. 
  (36) 
  Tubercles 
  not 
  as 
  above. 
  

  

  38. 
  (39) 
  Third, 
  4th 
  and 
  5th 
  abdominal 
  segments 
  with 
  conspicuous 
  

  

  yellow 
  bands, 
  not 
  or 
  only 
  shghtly 
  interrupted 
  in 
  the 
  

   middle 
  ; 
  species 
  not 
  very 
  small. 
  . 
  . 
  leucophthalmM. 
  

  

  39. 
  (38) 
  Third, 
  4th 
  and 
  5th 
  segments 
  without 
  conspicuous 
  bands 
  ; 
  

  

  species 
  small. 
  flavoguttata 
  ab. 
  

  

  