﻿492 
  Mr. 
  T. 
  D. 
  A. 
  Cockerell 
  — 
  Descriptions 
  and 
  

  

  the 
  others, 
  except 
  that 
  there 
  is 
  a 
  subapical, 
  round, 
  

   suffused, 
  black 
  spot, 
  the 
  hind 
  margin 
  in 
  middle 
  

   straight, 
  neither 
  excavated 
  nor 
  depressed 
  ; 
  last 
  

   segment 
  with 
  a 
  round 
  shining 
  depression, 
  in 
  which 
  

   is 
  a 
  strong 
  carina. 
  Twenty-three 
  specimens. 
  

   Takao, 
  March, 
  April, 
  August, 
  October 
  ; 
  Koroton, 
  

   Sept. 
  8, 
  1907. 
  

  

  Two 
  other 
  forms 
  come 
  from 
  the 
  Asiatic 
  maiuland 
  : 
  — 
  

  

  (4) 
  A. 
  caldwelli, 
  nov. 
  Face-markings 
  pale 
  yellow 
  as 
  in 
  

  

  korotonensis, 
  but 
  marks 
  at 
  sides 
  of 
  clypeus 
  large 
  

   and 
  notched 
  below, 
  shaped 
  entirely 
  as 
  in 
  calceifera 
  ; 
  

   hind 
  basitarsus 
  with 
  some 
  white 
  hair, 
  especially 
  at 
  

   base 
  ; 
  fifth 
  ventral 
  segment 
  black, 
  except 
  for 
  the 
  

   tuft 
  of 
  white 
  hair 
  on 
  each 
  side, 
  its 
  margin 
  broadly 
  

   shallowly 
  excavated 
  ; 
  abdominal 
  bands 
  light 
  blue. 
  

   Foochow, 
  China 
  {H. 
  R. 
  Caldwell). 
  U.S. 
  National 
  

   Museum. 
  I 
  have 
  erroneously 
  determined 
  this 
  as 
  

   A. 
  zonata. 
  

  

  (5) 
  A. 
  subecerulea, 
  Lepeletier. 
  Face-markings 
  very 
  pale 
  

  

  yellow 
  ; 
  clypeus 
  with 
  very 
  large 
  quadrate 
  black 
  

   patches 
  as 
  in 
  the 
  female 
  ; 
  hind 
  basitarsus 
  without 
  

   white 
  hair 
  ; 
  fifth 
  ventral 
  segment 
  with 
  hind 
  margin 
  

   straight. 
  Kalutara, 
  Cevlon, 
  March 
  1910, 
  2 
  ? 
  , 
  1 
  J 
  

   (E. 
  Comber); 
  Nasik, 
  India, 
  Sept. 
  1908 
  {E. 
  Comber). 
  

   British 
  Museum. 
  

  

  I 
  suppose 
  that 
  this 
  is 
  Lepeletier's 
  subccerulea, 
  

   as 
  he 
  describes 
  the 
  sexes 
  as 
  having 
  the 
  face- 
  

   markings 
  alike. 
  The 
  female 
  agrees 
  well 
  with 
  the 
  

   description, 
  except 
  that 
  the 
  antennae 
  are 
  red 
  

   beneath 
  from 
  the 
  end 
  of 
  the 
  third 
  segment, 
  and 
  

   the 
  fifth 
  abdominal 
  segment 
  has 
  black 
  hair 
  in 
  the 
  

   middle 
  and 
  white 
  at 
  the 
  sides 
  (instead 
  of 
  the 
  two 
  

   intermixed). 
  The 
  abdominal 
  bands 
  are 
  pale 
  blue, 
  

   as 
  in 
  caldwelli. 
  

  

  From 
  the 
  standpoint 
  of 
  genetics 
  the 
  above 
  insects 
  are 
  

   extremely 
  interesting. 
  The 
  differences 
  may 
  be 
  regarded 
  as 
  

   plus 
  and 
  minus 
  variations, 
  corresponding 
  probably 
  to 
  

   Mendelian 
  allelomorphic 
  pairs, 
  as 
  follows 
  : 
  — 
  

  

  (1) 
  Face-markings 
  yellow 
  ( 
  + 
  ) 
  or 
  white 
  (— 
  ). 
  

  

  (2) 
  Marks 
  at 
  sides 
  of 
  clypeus 
  like 
  female 
  ( 
  + 
  ), 
  or 
  boot- 
  

  

  like 
  (first 
  reduction 
  stage) 
  or 
  narrow 
  bands 
  (second 
  

   reduction 
  stage). 
  

  

  (3) 
  Hind 
  basitarsus 
  with 
  hair 
  all 
  black 
  ( 
  + 
  ) 
  or 
  partly 
  

  

  white 
  ( 
  — 
  ). 
  

  

  (4) 
  Fifth 
  ventral 
  segment 
  entire 
  ( 
  + 
  ) 
  or 
  emarginate 
  ( 
  — 
  ). 
  

  

  