﻿Manchester 
  Memoirs, 
  Vol. 
  xliv. 
  (1900), 
  No. 
  15. 
  85 
  

  

  four 
  foveae. 
  Securiform 
  articulation 
  stoutly 
  striated, 
  as 
  

   are 
  also 
  the 
  furrows 
  on 
  the 
  other 
  segments. 
  

  

  Agrees 
  in 
  coloration 
  with 
  B. 
  umbratilus 
  Cam. 
  which 
  

   may 
  be 
  known 
  from 
  it 
  by 
  the 
  propleurae 
  being 
  closely 
  

   punctured 
  and 
  striated 
  at 
  the 
  apex 
  ; 
  by 
  the 
  triangular 
  base 
  

   of 
  the 
  keel 
  on 
  the 
  second 
  segment 
  being 
  longitudinally 
  

   rugose; 
  and 
  by 
  the 
  mandibles 
  being 
  black. 
  

  

  RHOGAS 
  (?) 
  MANDIBULARS, 
  Sp. 
  110V. 
  

  

  Nigra, 
  mandibulis, 
  palpis 
  pedibusque 
  pallide 
  testaceis; 
  

   dimidio 
  apicali 
  tibiarum 
  posticarum 
  nigris 
  ; 
  a/is 
  liyalinis, 
  

   nervis 
  stigmateque 
  nigris. 
  6 
  . 
  

  

  Long. 
  9 
  mm. 
  

  

  Antennae 
  longer 
  than 
  the 
  body, 
  black, 
  tapering 
  

   towards 
  the 
  apex 
  ; 
  the 
  scape 
  covered 
  with 
  long 
  black 
  

   hairs 
  ; 
  the 
  flagellum 
  with 
  a 
  microscopic 
  pile. 
  Face 
  closely, 
  

   transversely, 
  rugosely 
  striated 
  ; 
  the 
  clypeus 
  finely 
  rugose; 
  

   its 
  apex 
  rufous. 
  Palpi 
  pale 
  testaceous. 
  Mandibles 
  rufous; 
  

   the 
  teeth 
  black. 
  Thorax 
  entirely 
  black 
  ; 
  the 
  mesonotum 
  

   aciculated, 
  covered 
  with 
  a 
  pale 
  microscopic 
  down. 
  Scu- 
  

   tellum 
  finely 
  punctured 
  and 
  more 
  thickly 
  pilose 
  than 
  the 
  

   mesonotum 
  ; 
  the 
  space 
  at 
  the 
  sides 
  of 
  the 
  post-scutellum 
  

   striated. 
  Median 
  segment 
  with 
  a 
  distinct 
  keel 
  down 
  the 
  

   middle 
  ; 
  thickly 
  covered 
  with 
  long 
  white 
  hair; 
  the 
  apical 
  

   half 
  irregularly 
  reticulated. 
  Propleurae 
  opaque, 
  the 
  base 
  

   aciculated, 
  the 
  rest 
  closely 
  and 
  finely 
  punctured 
  ; 
  the 
  apex 
  

   obscurely 
  and 
  irregularly 
  striated. 
  Mesopleurae 
  smooth 
  

   and 
  shining, 
  the 
  upper 
  part 
  at 
  the 
  base 
  finely 
  rugose 
  ; 
  the 
  

   metapleurae 
  above 
  obscurely, 
  below 
  finely 
  and 
  distinctly, 
  

   punctured. 
  Mesosternum 
  smooth 
  and 
  shining 
  ; 
  furrowed 
  

   down 
  the 
  middle 
  ; 
  its 
  base 
  oblique 
  with 
  the 
  furrow 
  wider 
  

   and 
  shallower, 
  and 
  with 
  a 
  fine 
  transverse 
  keel 
  at 
  the 
  apex. 
  

   The 
  pleurae 
  and 
  sternum 
  blotched 
  with 
  brown. 
  Legs 
  

  

  