﻿BOLBOCERATIIsTI 
  OF 
  THE 
  UNITED 
  STATES 
  — 
  CARTWRIGHT 
  105 
  

  

  alutaceous 
  under 
  high 
  magnification; 
  margined 
  at 
  base; 
  striae 
  mod- 
  

   erately 
  impressed, 
  the 
  strial 
  punctures 
  fine, 
  moderately 
  deep; 
  first 
  

   stria 
  interrupted 
  at 
  scutellum; 
  the 
  second 
  indistinct 
  near 
  scutellum. 
  

  

  Metasternal 
  lobe 
  separating 
  the 
  middle 
  coxae 
  half 
  as 
  wide 
  as 
  the 
  

   plate 
  behind 
  the 
  coxae; 
  lateral 
  edges 
  sharply 
  carinate. 
  

  

  Female 
  unknown. 
  

  

  Type.— 
  Iloloiype 
  male, 
  USNM 
  61455. 
  

  

  Type 
  locality. 
  — 
  Sarita, 
  Tex. 
  Holotj^pe 
  collected 
  on 
  bare 
  sand, 
  

   Nov. 
  30, 
  1911. 
  

  

  Paratypes. 
  — 
  One 
  male, 
  CAS, 
  Corpus 
  Christi, 
  Tex., 
  June 
  28, 
  1942, 
  

   E. 
  S. 
  Ross; 
  one 
  male, 
  in 
  Mark 
  Robinson 
  collection, 
  Kingsville, 
  Tex., 
  

   C. 
  T. 
  Reed. 
  

  

  Remarks. 
  — 
  Brady 
  cinetulus 
  rex 
  may 
  be 
  readily 
  separated 
  from 
  the 
  

   two 
  closely 
  allied 
  species 
  B. 
  ferrugineus 
  (Palisot 
  de 
  Beauvois) 
  and 
  B. 
  

   fossatus 
  (Haldeman) 
  by 
  the 
  obvious 
  differences 
  in 
  the 
  clypeal 
  and 
  

   thoracic 
  horns. 
  It 
  may 
  be 
  noted 
  also 
  that 
  the 
  last 
  tAvo 
  species 
  have 
  

   only 
  a 
  single 
  deep 
  fossa 
  on 
  each 
  side 
  of 
  the 
  pronotum, 
  while 
  in 
  B. 
  rex 
  

   this 
  is 
  doubled, 
  the 
  lower 
  cavity 
  sinuating 
  the 
  lateral 
  margin. 
  

  

  Bolbocerastes^ 
  new 
  genus 
  

  

  This 
  genus 
  is 
  closely 
  allied 
  to 
  Bradycinetulus 
  but 
  differs 
  in 
  that 
  the 
  

   apex 
  of 
  the 
  tibia 
  of 
  the 
  midleg 
  and 
  hind 
  leg 
  is 
  obliquely 
  truncate, 
  the 
  

   scutellum 
  is 
  smooth 
  or 
  minutely 
  punctate, 
  the 
  mandibles 
  are 
  parallel, 
  

   nearly 
  straight 
  sided 
  and 
  bent 
  sharply 
  inward 
  anteriorly, 
  the 
  sides 
  and 
  

   anterior 
  edges 
  forming 
  a 
  rectangle, 
  the 
  median 
  prominence 
  of 
  the 
  

   pronotum 
  is 
  without 
  horns, 
  two 
  elevated 
  carinae 
  are 
  present 
  on 
  each 
  

   side 
  of 
  the 
  pronotum, 
  the 
  prosternal 
  spine 
  behind 
  the 
  anterior 
  coxae 
  

   is 
  transverse, 
  doubly 
  pointed 
  and 
  remote 
  from 
  the 
  acutely 
  angled 
  

   intercoxal 
  piece, 
  and 
  the 
  aedeagus 
  of 
  the 
  male 
  is 
  of 
  a 
  characteristic 
  form 
  

   (see 
  fig. 
  14). 
  

  

  Genotype. 
  — 
  Bolbocerastes 
  regalis, 
  new 
  species. 
  

  

  Key 
  to 
  the 
  species 
  of 
  Bolbocerastes 
  

  

  1. 
  Anterior 
  clypeal 
  horn 
  of 
  male 
  widely 
  truncate; 
  anterior 
  and 
  median 
  horns 
  

  

  of 
  female 
  usually 
  equal 
  in 
  width, 
  smooth 
  back 
  of 
  median 
  horn 
  (Arizona, 
  

  

  Nevada, 
  California) 
  regalis, 
  new 
  species 
  

  

  Anterior 
  clypeal 
  horn 
  of 
  male 
  narrowly 
  truncate 
  or 
  rounded; 
  anterior 
  horn 
  

   narrower 
  than 
  median 
  horn 
  in 
  female, 
  punctate 
  back 
  of 
  median 
  horn. 
  2 
  

  

  2. 
  Dull, 
  dark 
  reddish 
  brown; 
  elytral 
  striae 
  extremely 
  fine, 
  not 
  impressed, 
  the 
  

  

  intervals 
  completely 
  flat 
  even 
  in 
  reflected 
  light, 
  strial 
  punctures 
  very 
  fine; 
  

   fully 
  developed 
  male 
  with 
  the 
  anterior 
  clypeal 
  horn 
  narrowly 
  rounded 
  and 
  

   very 
  little 
  advanced, 
  much 
  closer 
  and 
  more 
  nearly 
  in 
  line 
  with 
  the 
  strongly 
  

   developed 
  lateral 
  horns 
  than 
  in 
  serratus 
  and 
  imperialis 
  (California, 
  Baja 
  

  

  California) 
  peninsularis 
  (SchaefFer) 
  

  

  Elytral 
  striae 
  fine 
  to 
  moderate, 
  usually 
  at 
  least 
  slightly 
  impressed, 
  the 
  intervals 
  

   weakly 
  convex 
  in 
  reflected 
  light; 
  fully 
  developed 
  males 
  not 
  as 
  above 
  3 
  

  

  