﻿530 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

  

  at 
  base 
  beneath; 
  median 
  sulcus 
  broad, 
  usually 
  quite 
  deep, 
  wider 
  

   toward 
  the 
  apex 
  of 
  the 
  rostrum; 
  lateral 
  sulci 
  deep, 
  arcuate, 
  convergent 
  

   toward 
  the 
  base 
  of 
  the 
  rostrum; 
  intersulcal 
  ridges 
  usually 
  very 
  large, 
  

   flat. 
  Head 
  rounded, 
  ridges 
  above 
  eyes 
  prominent; 
  punctation 
  of 
  

   head 
  and 
  rostrum 
  very 
  fine 
  and 
  sparse. 
  Pronotum 
  two-fifths 
  wider 
  

   than 
  long, 
  widest 
  at 
  middle 
  or 
  at 
  basal 
  two-fifths, 
  base 
  varying 
  from 
  

   very 
  little 
  to 
  nearly 
  one-fourth 
  wider 
  than 
  apex; 
  sides 
  varying 
  from 
  

   evenly 
  rounded 
  to 
  rough 
  and 
  tuberculate, 
  constricted 
  before 
  base 
  

   and 
  apex; 
  disk 
  coarsely, 
  sparsely 
  punctate 
  ; 
  median 
  groove 
  subobsolete. 
  

   Elytra 
  cordiform, 
  about 
  one-third 
  longer 
  than 
  wide, 
  base 
  produced; 
  

   striae 
  finely 
  impressed, 
  punctures 
  large, 
  round, 
  shallow, 
  separate, 
  

   usually 
  at 
  least 
  partially 
  obscured 
  by 
  the 
  scaly 
  covering; 
  setae 
  num.er- 
  

   ous, 
  short, 
  subrecumbent, 
  white 
  or 
  yellow. 
  Legs 
  moderately 
  stout; 
  

   anterior 
  tibiae 
  not 
  denticulate 
  within; 
  posterior 
  tibiae 
  obliquely 
  trun- 
  

   cate 
  to 
  rounded 
  and 
  not 
  at 
  all 
  truncate. 
  

  

  Measurements 
  in 
  millimeters.' 
  — 
  Length 
  6.2 
  to 
  11. 
  

  

  Figure 
  68. 
  — 
  Ophryastes 
  sulcirostris 
  (Say): 
  a, 
  Female 
  genital 
  tube, 
  dorsal 
  view; 
  b, 
  female 
  

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

   genitalia, 
  dorsal 
  and 
  lateral 
  views. 
  

  

  Female 
  genitalia 
  (fig. 
  68, 
  a, 
  h, 
  c). 
  — 
  Genital 
  tube 
  tubular, 
  moderately 
  

   heavily 
  chitinized; 
  apical 
  plates 
  flattened, 
  twisted 
  out 
  of 
  horizontal 
  

   plane, 
  and 
  rounded 
  at 
  apices, 
  the 
  inner 
  edge 
  of 
  each 
  raised 
  into 
  a 
  nar- 
  

   row 
  keel, 
  which 
  is 
  more 
  prominent 
  apically; 
  coxites 
  moderate, 
  a 
  

   trifle 
  flattened 
  laterally, 
  and 
  subcorneal; 
  styli 
  extremely 
  minute, 
  

   hardly 
  visible. 
  Eighth 
  sternite 
  rather 
  narrow, 
  deeply 
  obtusely 
  emar- 
  

   ginate 
  at 
  apex, 
  the 
  emargination 
  rounded 
  at 
  bottom. 
  

  

  Male 
  genitalia 
  (fig. 
  68, 
  d). 
  — 
  Median 
  lobe 
  rather 
  strongly 
  curved, 
  

   extremely 
  thin 
  at 
  apex, 
  not 
  deeply 
  excavated 
  above, 
  with 
  a 
  thin 
  keel 
  on 
  

   the 
  dorsal 
  midline 
  reaching 
  nearly 
  to 
  the 
  apex. 
  

  

  Type 
  locality. 
  — 
  Of 
  sulcirostris, 
  "Arkansa"; 
  of 
  ligatus, 
  Nebraska. 
  

  

  [The 
  synonymy 
  of 
  ligatus 
  LeConte 
  with 
  sulcirostris 
  Say 
  was 
  pro- 
  

   posed 
  by 
  Horn 
  (1876, 
  p. 
  31).l 
  

  

  Specimens 
  of 
  sulcirostris 
  have 
  been 
  seen 
  from 
  the 
  following 
  localities: 
  

   Arizona, 
  Peach 
  Springs 
  (Wickham); 
  Williams. 
  New 
  Mexico, 
  A1- 
  

  

  