﻿40 
  Mr. 
  Cameron 
  on 
  

  

  the 
  middle, 
  the 
  mandibles 
  and 
  trophi 
  yellow, 
  the 
  tips 
  of 
  the 
  

   mandibles 
  black, 
  piceous-red 
  before 
  the 
  black. 
  Thorax 
  

   punctured, 
  closely 
  covered 
  with 
  pale 
  pubescence 
  ; 
  a 
  line 
  on 
  

   the 
  collar, 
  tubercles, 
  tegulae, 
  the 
  scutellum, 
  except 
  at 
  the 
  

   apex, 
  clear 
  stramineous-yellow 
  ; 
  the 
  lateral 
  plates 
  of 
  the 
  

   metanotum 
  pale 
  yellow. 
  Pronotum 
  rounded, 
  the 
  sides 
  

   obliquely 
  truncated 
  ; 
  scutellum 
  stoutly 
  keeled 
  down 
  the 
  

   centre 
  ; 
  the 
  central 
  mucor 
  longer 
  than 
  broad, 
  very 
  slightly 
  

   and 
  gradually 
  dilated 
  towards 
  the 
  apex, 
  which 
  is 
  acutely 
  

   and 
  somewhat 
  triangularly, 
  incised 
  ; 
  the 
  lateral 
  plates 
  are 
  

   large, 
  curved 
  outwardly 
  and 
  ending 
  in 
  a 
  sharply 
  triangular 
  

   point 
  ; 
  median 
  segment 
  with 
  an 
  oblique 
  slope, 
  finely 
  

   shagreened 
  ; 
  there 
  is 
  a 
  short 
  furrow 
  below 
  the 
  central 
  

   mucor 
  ; 
  two 
  keels 
  run 
  from 
  the 
  lateral 
  plates, 
  becoming 
  

   united 
  near 
  the 
  apex 
  of 
  the 
  segment 
  ; 
  and 
  two 
  other 
  keels 
  

   run 
  from 
  the 
  sides 
  ; 
  metapleura; 
  finely 
  longitudinally 
  

   shagreened. 
  Abdomen 
  shining, 
  closely 
  punctured 
  ; 
  a 
  yellow 
  

   line 
  on 
  the 
  side 
  of 
  the 
  segments 
  ; 
  pygidial 
  area 
  densely 
  

   covered 
  with 
  stiff 
  depressed 
  golden-fulvous 
  hairs. 
  Wings 
  

   clear 
  hyaline, 
  the 
  recurrent 
  nervure 
  quite 
  straight, 
  not 
  

   oblique, 
  and 
  received 
  before 
  the 
  middle 
  of 
  the 
  radial 
  cellule. 
  

   Length 
  nearly 
  5 
  mm. 
  

  

  ^^OXYBELUS 
  CANESCENS 
  Sp 
  UOV. 
  (PI. 
  X., 
  f 
  22.) 
  

  

  Head 
  closely 
  punctured, 
  densely 
  covered 
  with 
  long 
  grey 
  

   pubescence. 
  Ocelli 
  separated 
  from 
  each 
  other 
  by 
  twice 
  the 
  

   distance 
  they 
  are 
  from 
  the 
  eyes, 
  which 
  are 
  very 
  slightly 
  

   diverging 
  towards 
  the 
  clypeus. 
  Mandibles 
  pale 
  yellow, 
  the 
  

   apex 
  black. 
  Collar 
  projecting 
  in 
  the 
  middle, 
  slightly 
  

   concave, 
  and 
  with 
  an 
  oblique 
  slope 
  to 
  the 
  head. 
  Thorax 
  

   densely 
  covered 
  with 
  a 
  greyish 
  pubescence, 
  strongly 
  punc- 
  

   tured, 
  the 
  pleurae 
  almost 
  rugose 
  ; 
  the 
  oblique 
  furrow 
  crenu- 
  

   lated; 
  there 
  is 
  also 
  a 
  longitudinal 
  furrow,and 
  a 
  narrow 
  oblique 
  

   onerunsdown 
  from 
  the 
  apex 
  of 
  the 
  fore 
  wings. 
  Lateral 
  laminae 
  

   curved, 
  bi-dentate 
  at 
  the 
  apex, 
  the 
  central 
  curved, 
  convex 
  

  

  