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  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  los 
  

  

  Type 
  locality. 
  — 
  Dog 
  Canyon, 
  Brewster 
  County, 
  Tex. 
  

  

  Specimens 
  examined.- 
  — 
  4, 
  including 
  the 
  holotype. 
  

  

  Distribution. 
  — 
  Texas: 
  Dog 
  Canyon, 
  Glenn 
  Spring, 
  and 
  Boquillas, 
  

   all 
  in 
  Brewster 
  County. 
  Arizona: 
  Miller 
  Canyon, 
  Huachuca 
  

   Mountains. 
  

  

  Season. 
  — 
  July 
  7 
  to 
  29. 
  

  

  Bolborhombus 
  parvulus, 
  new 
  species 
  

  

  Figure 
  14, 
  a 
  

  

  HolotjT^pe 
  male, 
  length 
  9 
  mm., 
  width 
  6 
  mm. 
  Shiny, 
  rufotestaceous, 
  

   densely 
  hairy 
  beneath. 
  Clypeus 
  extending 
  obliquel}'^ 
  upward 
  and 
  

   backward 
  to 
  top 
  of 
  clypeal 
  horn; 
  the 
  anterior 
  face 
  practically 
  flat, 
  

   its 
  surface 
  closely, 
  very 
  coarsely 
  punctate, 
  with 
  the 
  forward 
  edge 
  

   convex 
  and 
  deeply 
  reticulate-punctate, 
  the 
  lateral 
  edges 
  parallel 
  and 
  

   sharply 
  carmiform; 
  upper 
  edge 
  of 
  the 
  horn 
  shallowly 
  emarginate, 
  the 
  

   external 
  angles 
  only 
  slightly 
  tubcrculiform, 
  from 
  them 
  a 
  moderately 
  

   high, 
  sharp 
  carina 
  curving 
  back 
  each 
  side 
  and 
  ending 
  somewhat 
  

   abruptly 
  close 
  to 
  the 
  innermost 
  edge 
  of 
  the 
  eye; 
  surface 
  of 
  head 
  back 
  

   of 
  horn 
  uneven, 
  with 
  close, 
  niLxed 
  fine 
  and 
  coarse 
  punctures 
  and 
  with 
  a 
  

   short, 
  elevated, 
  transverse, 
  anteriorly 
  arcuate 
  carina 
  midway 
  between 
  

   the 
  similarly 
  punctate, 
  sharply 
  edged, 
  concave, 
  depressed 
  ocular 
  canthi 
  ; 
  

   the 
  carina 
  about 
  one-third 
  as 
  long 
  as 
  the 
  width 
  of 
  the 
  clypeal 
  horn; 
  

   the 
  punctures 
  back 
  of 
  the 
  carina 
  not 
  quite 
  as 
  close 
  as 
  in 
  front; 
  the 
  

   occiput 
  smooth, 
  closely, 
  minutely 
  punctate. 
  

  

  Pronotum 
  with 
  three 
  rather 
  deep 
  foveae 
  close 
  behind 
  the 
  finely 
  

   margined 
  anterior 
  edge, 
  one 
  median, 
  the 
  others 
  opposite 
  mner 
  eye 
  

   margin 
  on 
  each 
  side; 
  a 
  sharp 
  postapical 
  carina, 
  slightly 
  undercut 
  on 
  

   posterior 
  side, 
  starting 
  on 
  each 
  side 
  of 
  the 
  middle 
  fovea 
  and 
  passing 
  

   close 
  behind 
  the 
  lateral 
  foveae 
  toward 
  but 
  not 
  quite 
  reaching 
  the 
  

   serrate 
  side 
  margin 
  at 
  about 
  anterior 
  third; 
  a 
  second 
  short, 
  similar 
  

   carina 
  on 
  each 
  side 
  straight 
  back 
  from 
  near 
  the 
  end 
  of 
  the 
  postapical 
  

   carina 
  to 
  the 
  inner 
  anterior 
  edge 
  of 
  a 
  strong 
  lateral 
  fovea; 
  a 
  shallow, 
  

   coarsely 
  punctate 
  groove 
  half 
  way 
  across 
  the 
  pronotum 
  upward 
  and 
  

   backward 
  from 
  each 
  of 
  the 
  tliree 
  anterior 
  foveae; 
  a 
  row 
  of 
  close 
  coarse 
  

   punctures 
  in 
  the 
  lateral 
  and 
  basal 
  marginal 
  line, 
  a 
  few 
  m 
  the 
  basal 
  

   half 
  of 
  median 
  line, 
  and 
  scattered 
  coarse 
  punctures 
  on 
  both 
  sides 
  of 
  

   the 
  lateral 
  carma 
  and 
  continued 
  upward 
  to 
  opposite 
  the 
  humerus, 
  with 
  

   mixed 
  fine 
  and 
  minute 
  punctation 
  throughout; 
  anterior 
  angles 
  slightly 
  

   more 
  than 
  a 
  right 
  angle; 
  posterior 
  angles 
  obtusely 
  rounded; 
  base 
  

   distinctly 
  margined. 
  Scutellum 
  with 
  mLxed, 
  very 
  fine 
  and 
  minute 
  

   punctation. 
  

  

  Elytra 
  not 
  margined 
  basally; 
  striae 
  weakly 
  impressed; 
  strial 
  pimc- 
  

   tures 
  fine; 
  first 
  two 
  striae 
  interrupted 
  by 
  the 
  scutellum; 
  intervals 
  

   weakly 
  convex; 
  the 
  surface 
  minutely 
  punctate, 
  very 
  finely 
  alutaceous 
  

   under 
  moderately 
  high 
  magnification. 
  

  

  I 
  

  

  