﻿548 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

  

  darker, 
  to 
  very 
  dark 
  gray-brown 
  with 
  two 
  narrow 
  light 
  gray 
  stripes 
  

   upon 
  head 
  and 
  pronotmn, 
  carried 
  back 
  upon 
  the 
  second 
  elytral 
  stria 
  

   a 
  short 
  distance, 
  and 
  with 
  a 
  few 
  irregular 
  lighter 
  mottlings 
  upon 
  the 
  

   elytra. 
  Partially 
  denuded 
  specimens 
  may 
  be 
  more 
  or 
  less 
  uniform 
  

   gray-brown. 
  Rostrum 
  robust, 
  constricted 
  basally 
  beneath, 
  evidently 
  

   arched 
  above; 
  median 
  sulcus 
  narrow, 
  deep, 
  interrupted 
  at 
  apical 
  

   fourth, 
  whence 
  it 
  becomes 
  a 
  small 
  median 
  carina 
  upon 
  the 
  apex 
  of 
  

  

  Figure 
  11 
  . 
  — 
  Rhigopsis 
  effracta 
  LeConte: 
  a, 
  Female 
  genital 
  tube, 
  dorsal 
  view; 
  b, 
  apex 
  of 
  

   female 
  genital 
  tube, 
  ventral 
  view; 
  c, 
  apex 
  of 
  female 
  genital 
  tube, 
  lateral 
  view; 
  d, 
  recep- 
  

   taculum 
  seminis; 
  e, 
  median 
  lobe 
  of 
  male 
  genitalia, 
  dorsal 
  view; 
  /, 
  median 
  lobe 
  of 
  male 
  

   genitalia, 
  lateral 
  view. 
  

  

  the 
  rostrum; 
  basally 
  extending 
  up 
  onto 
  the 
  head, 
  although 
  sometimes 
  

   interrupted 
  at 
  a 
  point 
  between 
  the 
  eyes; 
  lateral 
  sulci 
  broad, 
  rounded 
  

   at 
  bottom, 
  nearly 
  straight, 
  widening 
  markedly 
  toward 
  the 
  base 
  of 
  

   the 
  rostrum. 
  Head 
  rounded, 
  the 
  ridges 
  above 
  the 
  eyes 
  prominent, 
  

   tuberculate. 
  Elytra 
  slightly 
  inflated, 
  humeri 
  dentiform; 
  elytral 
  in- 
  

   tervals 
  2, 
  4, 
  and 
  6 
  greatly 
  elevated, 
  a 
  conspicuous 
  tubercle 
  apically 
  

   at 
  the 
  end 
  of 
  4, 
  at 
  the 
  junction 
  of 
  5 
  and 
  6, 
  and 
  a 
  smaller 
  one 
  at 
  the 
  

   junction 
  of 
  2 
  and 
  8. 
  Strial 
  punctures 
  small, 
  round, 
  distinct, 
  each 
  

   with 
  a 
  small 
  white 
  seta; 
  a 
  secondary 
  system 
  of 
  extreme^ 
  large, 
  deep 
  

   punctures 
  upon 
  the 
  elytral 
  intervals 
  gives 
  an 
  irregular, 
  "warty" 
  

   appearance; 
  setae 
  upon 
  the 
  intervals, 
  head, 
  and 
  rostrum 
  flattened, 
  

   recumbent, 
  brown 
  except 
  at 
  sides 
  and 
  apices 
  of 
  elytra, 
  where 
  they 
  

   are 
  white. 
  Vestiture 
  throughout 
  imbricate. 
  Legs 
  rather 
  stout 
  and 
  

   short, 
  hind 
  tibiae 
  sub 
  truncate. 
  

  

  Measurements 
  in 
  millimeters. 
  — 
  Length 
  about 
  4.5 
  to 
  6.5. 
  

  

  Female 
  genitalia 
  (fig. 
  77, 
  a, 
  b, 
  c, 
  d). 
  — 
  Genital 
  tube 
  tubular, 
  semi- 
  

  

  