﻿22 
  Mr. 
  Cameron 
  on 
  

  

  as 
  a 
  synonym. 
  Gerstacker's 
  species 
  was 
  from 
  West 
  Africa 
  

   Dahlbom's 
  from 
  Java. 
  

  

  <<^ERCERIS 
  DENTATA, 
  Sp. 
  710V. 
  (PI. 
  X., 
  f 
  lO, 
  a, 
  b.) 
  

  

  Black 
  ; 
  the 
  clypeus, 
  cheeks, 
  antenna 
  1 
  ridge, 
  mandibles 
  

   except 
  at 
  the 
  apex, 
  a 
  spot 
  behind 
  the 
  eyes, 
  an 
  interrupted 
  

   line 
  on 
  the 
  pronotum, 
  two 
  marks 
  on 
  the 
  scutellum, 
  two 
  

   marks 
  on 
  the 
  mesopleurse, 
  metanotum, 
  two 
  elongated 
  marks 
  

   on 
  the 
  median 
  segment, 
  two 
  small 
  marks 
  on 
  the 
  petiole, 
  a 
  

   line 
  on 
  the 
  apex 
  of 
  the 
  second 
  and 
  third 
  abdominal 
  segments, 
  

   the 
  fifth, 
  except 
  at 
  the 
  base, 
  the 
  femora 
  beneath 
  and 
  the 
  

   tibiae 
  and 
  tarsi, 
  clear 
  yellow 
  ; 
  the 
  petiole, 
  coxse, 
  and 
  femora, 
  

   ferruginous 
  ; 
  wings 
  hyaline 
  ; 
  very 
  slightly 
  infuscated 
  at 
  the 
  

   apex. 
  Clypeus 
  depressed, 
  the 
  apex 
  transverse. 
  Eyes 
  a 
  

   little 
  diverging 
  ; 
  ocelli 
  not 
  forming 
  a 
  triangle, 
  the 
  posterior 
  

   separated 
  from 
  the 
  eyes 
  by 
  the 
  length 
  of 
  the 
  third 
  antennal 
  

   joint 
  and 
  from 
  each 
  other 
  by 
  the 
  length 
  of 
  the 
  fourth. 
  

   Body 
  covered 
  with 
  a 
  white 
  pubescence, 
  silvery 
  on 
  the 
  

   face 
  ; 
  the 
  punctuation 
  moderately 
  strong. 
  The 
  mesosternum 
  

   in 
  the 
  middle 
  projects 
  into 
  two 
  stout 
  teeth 
  ; 
  the 
  posterior 
  

   being 
  the 
  larger. 
  Trigonal 
  area 
  elongated, 
  reaching 
  

   nearly 
  to 
  the 
  apex 
  of 
  the 
  segment, 
  much 
  longer 
  than 
  

   broad, 
  smooth, 
  impunctate, 
  a 
  fovea 
  on 
  either 
  side 
  of 
  the 
  

   furrow. 
  Scutellum 
  almost 
  impunctate. 
  Mesopleur^ 
  

   rugosely 
  punctured, 
  convex, 
  bulging 
  out 
  above 
  ; 
  meta- 
  

   pleuras 
  finely 
  and 
  closely 
  rugose 
  at 
  the 
  base, 
  the 
  apex 
  with 
  

   large 
  punctures. 
  Petiole 
  hardly 
  longer 
  than 
  broad. 
  Pygi- 
  

   dial 
  area 
  narrowed 
  at 
  base 
  and 
  apex, 
  bulging 
  out 
  gradually 
  

   in 
  the 
  middle, 
  the 
  apex 
  above 
  black, 
  the 
  rest 
  dull 
  rufous, 
  

   and 
  punctured 
  ; 
  the 
  hair 
  fringe 
  dense, 
  obscure 
  white. 
  

   Ventral 
  surface 
  with 
  second 
  and 
  third 
  segments 
  banded 
  

   with 
  pale 
  yellow 
  ; 
  covered 
  with 
  long 
  white 
  hair 
  ; 
  the 
  in- 
  

   cision 
  in 
  apical 
  segment 
  reaching 
  near 
  to 
  the 
  middle, 
  

   rounded 
  at 
  base. 
  Wings 
  shorter 
  than 
  usual 
  ; 
  the 
  second 
  

  

  