﻿526 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

  

  well 
  marked 
  transverse 
  impression. 
  Immediately 
  posterior 
  to 
  this, 
  

   in 
  some 
  specimens, 
  there 
  is 
  a 
  tubercle, 
  or 
  slight 
  transverse 
  ridge, 
  upon 
  

   the 
  front. 
  Supraorbital 
  ridges 
  moderate, 
  a 
  vague 
  depression 
  before 
  

   each 
  eye; 
  head 
  and 
  rostrum 
  moderately 
  finely 
  and 
  closely 
  punctate, 
  

   with 
  a 
  fairly 
  long 
  white 
  or 
  j^ellowish 
  seta 
  in 
  each 
  puncture. 
  Pronotum 
  

   from 
  two-fifths 
  to 
  a 
  little 
  less 
  than 
  one-half 
  wider 
  than 
  long; 
  base 
  

   one-third 
  to 
  one-fourth 
  wider 
  than 
  apex, 
  fimbriate 
  with 
  brown 
  or 
  

   yellow 
  scales; 
  sides 
  strongly 
  tuberculate, 
  each 
  lateral 
  ridge 
  divided 
  

   into 
  several 
  small 
  tubercles 
  at 
  apex; 
  disk 
  coarsely 
  and 
  irregularly 
  

   punctate, 
  rugose, 
  with 
  small 
  white 
  or 
  yellow 
  setae 
  in 
  smaller 
  second- 
  

   ary 
  pimctures 
  upon 
  the 
  intervals. 
  Median 
  groove 
  nearly 
  or 
  quite 
  

  

  Figure 
  65. 
  — 
  Ophryastes 
  latirostris 
  LeConte: 
  a. 
  Female 
  genital 
  tube, 
  dorsal 
  view; 
  b, 
  female 
  

   genital 
  tube, 
  ventral 
  view; 
  c, 
  female 
  genital 
  tube, 
  lateral 
  view; 
  d, 
  median 
  lobe 
  of 
  male 
  

   genitalia, 
  lateral 
  and 
  dorsal 
  views. 
  

  

  obsolete. 
  Elytra 
  moderately 
  inflated, 
  widest 
  at 
  basal 
  one-third 
  

   (female) 
  or 
  at 
  middle 
  (male) 
  ; 
  striae 
  finely 
  impressed 
  (sometimes 
  not 
  

   impressed); 
  punctures 
  large, 
  round, 
  evenly 
  spaced; 
  intervals 
  convex, 
  

   1 
  and 
  6 
  narrower, 
  remainder 
  subequal 
  m 
  width. 
  Legs 
  moderately 
  

   stout; 
  front 
  tibiae 
  not 
  denticulate 
  within; 
  hind 
  tibiae 
  obliquely 
  trim- 
  

   cate 
  at 
  apex, 
  the 
  space 
  covered 
  with 
  flat 
  scales. 
  Tarsi 
  not 
  pubescent 
  

   beneath, 
  but 
  apices 
  of 
  lobes 
  pointed, 
  spinelike. 
  

  

  Measurements 
  in 
  millimeters. 
  — 
  Length 
  11-16, 
  

  

  Female 
  genitalia 
  (fig. 
  65, 
  a, 
  b, 
  c). 
  — 
  Genital 
  tube 
  heavily 
  chitinized; 
  

   apical 
  plates 
  flattened, 
  rounded 
  at 
  apex, 
  inner 
  edge 
  raised 
  in 
  a 
  high 
  

   keel, 
  the 
  apex 
  of 
  which, 
  when 
  viewed 
  from 
  above, 
  appears 
  to 
  be 
  a 
  

   tooth; 
  coxites 
  large, 
  subconical; 
  styli 
  small, 
  dorsolateral 
  in 
  position; 
  

   eighth 
  sternite 
  broadly, 
  obtusely 
  emarginate 
  at 
  apex 
  (more 
  so 
  than 
  in 
  

   0. 
  tuberosus 
  LeConte). 
  

  

  Male 
  genitalia 
  (fig. 
  65, 
  d). 
  — 
  Median 
  lobe 
  stout; 
  in 
  profile 
  apex 
  

   rounded, 
  portion 
  immediately 
  back 
  of 
  apex 
  nearly 
  straight, 
  remamder 
  

   evenly 
  curved; 
  as 
  viewed 
  from 
  above 
  rather 
  deeply 
  excavated; 
  apex 
  

   roimded, 
  with 
  a 
  deep, 
  obtuse 
  emargination. 
  A 
  distinct 
  keel 
  runs 
  

   from 
  the 
  apex 
  to 
  the 
  median 
  orifice 
  upon 
  the 
  upper 
  side. 
  

  

  