﻿104 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  los 
  

  

  the 
  rounded, 
  elevated, 
  anterior 
  angle, 
  surface 
  ridged 
  inward 
  from 
  the 
  

   angle, 
  depressed 
  along 
  anterior 
  edge 
  and 
  in 
  posterior 
  angle. 
  Margin 
  

   of 
  head 
  along 
  inner 
  edge 
  of 
  the 
  eye 
  with 
  a 
  reflexed 
  carina, 
  which 
  grad- 
  

   ually 
  curves 
  away 
  from 
  the 
  eye, 
  increases 
  to 
  a 
  maximum 
  height, 
  then 
  

   angles 
  sharply 
  inward 
  and 
  backward 
  and 
  sharply 
  descends 
  to 
  general 
  

   level 
  of 
  head 
  ; 
  head 
  surface, 
  including 
  eye 
  canthi, 
  reticulate-tuberculate- 
  

   punctate, 
  very 
  rough 
  anteriorly 
  on 
  the 
  concave 
  posterior 
  of 
  the 
  clypeal 
  

   horn, 
  gradually 
  smoother 
  over 
  discal 
  area, 
  which 
  is 
  bounded 
  poste- 
  

   riorly 
  by 
  a 
  low, 
  rounded 
  ridge 
  between 
  the 
  eyes; 
  the 
  reticulation 
  and 
  

   tubercles 
  of 
  the 
  discal 
  area 
  flatten 
  until 
  the 
  outlines 
  of 
  the 
  coarse, 
  

   shallow 
  punctures 
  are 
  barely 
  traceable 
  ; 
  head 
  behind 
  the 
  ridge 
  smooth 
  

   at 
  middle 
  but 
  gradually 
  roughened 
  near 
  the 
  eyes. 
  

  

  Pronotum 
  similar 
  to 
  that 
  of 
  B. 
  ferrugineus 
  (Palisot 
  de 
  Beau 
  vols) 
  

   but 
  with 
  the 
  horns 
  of 
  the 
  median 
  prominence 
  and 
  the 
  high 
  lateral 
  

   edges 
  of 
  the 
  depressions 
  much 
  farther 
  forward. 
  The 
  anterior 
  edge 
  

   of 
  the 
  pronotum 
  very 
  finely 
  margined, 
  the 
  middle 
  third 
  arching 
  slightly 
  

   over 
  the 
  base 
  of 
  the 
  head, 
  each 
  outer 
  third 
  without 
  a 
  curve, 
  straight, 
  

   diverging 
  anteriorly 
  to 
  the 
  right-angled 
  anterior 
  angles, 
  slightly 
  

   concave 
  close 
  along 
  these 
  straight 
  edges, 
  then 
  very 
  obtusely 
  convex 
  

   and 
  rounding 
  into 
  the 
  deep 
  lateral 
  depressions, 
  the 
  middle 
  third 
  with 
  

   a 
  smaller, 
  closer, 
  parallel 
  convexity 
  and 
  a 
  moderate 
  concavity 
  at 
  each 
  

   end; 
  pronotum 
  laterally 
  with 
  two 
  very 
  large 
  deep 
  fossae 
  on 
  each 
  side, 
  

   the 
  lower 
  wider 
  and 
  less 
  deep, 
  widely 
  sinuating 
  the 
  lateral 
  margin 
  

   from 
  middle 
  to 
  near 
  the 
  anterior 
  angles, 
  the 
  upper 
  very 
  deep, 
  the 
  

   outer 
  edge 
  thrown 
  up 
  in 
  a 
  high, 
  thin, 
  curving 
  edge 
  which 
  descends 
  

   to 
  the 
  posterior 
  boundary 
  of 
  the 
  lower 
  cavity; 
  posterior 
  angles 
  distinct 
  

   but 
  obtusely 
  rounded; 
  sides 
  and 
  base 
  margined, 
  the 
  edge 
  rather 
  finely 
  

   serrate 
  laterally; 
  pronotum 
  convex 
  basally; 
  disc 
  forming 
  a 
  broad 
  

   median 
  prominence 
  with 
  a 
  sharp 
  horn 
  pointing 
  upward 
  on 
  each 
  side, 
  

   the 
  horns 
  being 
  rather 
  sharply 
  undercut 
  below 
  and 
  basally 
  flattened 
  

   in 
  front 
  and 
  behind; 
  a 
  deep 
  median 
  line 
  from 
  base 
  forward 
  over 
  the 
  

   median 
  prominence 
  and 
  down 
  between 
  the 
  horns. 
  Surface 
  of 
  the 
  

   pronotum 
  alutaceous 
  and 
  finely 
  scabrous 
  back 
  of 
  the 
  anterior 
  margin, 
  

   especially 
  at 
  the 
  sides, 
  then 
  shallowly, 
  coarsely 
  punctate 
  over 
  the 
  

   inner 
  lower 
  surface 
  of 
  the 
  lateral 
  fossae; 
  posterior 
  angles 
  similarly 
  

   finely 
  alutaceous 
  and 
  closely, 
  coarsely, 
  shallowly 
  punctate; 
  elsewhere 
  

   finely 
  to 
  minutely, 
  sparsely 
  punctate 
  throughout, 
  except 
  for 
  the 
  very 
  

   smooth 
  surface 
  of 
  the 
  deeper 
  fossae; 
  and 
  with 
  a 
  large 
  group 
  of 
  close 
  

   very 
  coarse 
  punctures 
  on 
  each 
  side 
  back 
  of 
  the 
  horn 
  and 
  above 
  the 
  

   deeper 
  fossa, 
  another 
  group 
  following 
  the 
  median 
  line 
  and 
  spreading 
  

   anteriorly 
  to 
  bases 
  of 
  the 
  horns. 
  

  

  scutellum 
  finely 
  punctate. 
  Elytra 
  not 
  strongly 
  shining; 
  minutely 
  

  

  