﻿BOLBOCERATINI 
  OF 
  THE 
  UNITED 
  STATES 
  — 
  CARTWRIGHT 
  113 
  

  

  Aedeagus 
  as 
  in 
  imperialis. 
  

  

  Allotype 
  female, 
  length 
  16 
  mm., 
  width 
  11 
  mm. 
  Similar 
  to 
  typical 
  

   B. 
  imperialis 
  except 
  that 
  punctm-es 
  are 
  coarser 
  throughout; 
  foveae 
  

   are 
  deeper; 
  elytral 
  striae 
  are 
  deeper; 
  and 
  the 
  eye 
  can 
  thus 
  has 
  a 
  convex 
  

   swelling 
  diagonally 
  inward 
  from 
  the 
  anterior 
  angle. 
  

  

  Type. 
  — 
  Holotype 
  male, 
  in 
  Canadian 
  Department 
  of 
  Agriculture 
  

   collection. 
  

  

  Type 
  locality. 
  — 
  Kush 
  County, 
  Kan. 
  

  

  Allotype 
  and 
  paratypes. 
  — 
  Allotype 
  and 
  6 
  paratypes 
  bear 
  data 
  as 
  

   follows: 
  Kansas: 
  4 
  (including 
  allotype 
  female), 
  Eush 
  County, 
  Aug. 
  5, 
  

   1920; 
  2, 
  Ness 
  County, 
  Aug. 
  5, 
  1920; 
  1, 
  Ness 
  County, 
  2,260 
  feet, 
  

   July 
  5, 
  1912, 
  Williams. 
  Paratypes 
  vary 
  from 
  13 
  to 
  17 
  mm. 
  in 
  length, 
  

   and 
  8 
  to 
  11 
  mm. 
  in 
  width. 
  

  

  Paratypes 
  in 
  CD 
  A, 
  KAN, 
  and 
  USNM. 
  

  

  Remarks. 
  — 
  Bolbocerastes 
  imperialis 
  kansanus 
  may 
  be 
  separated 
  from 
  

   B. 
  serratus 
  (LeConte) 
  by 
  the 
  doubly 
  angulate 
  upper 
  lateral 
  thoracic 
  

   carina 
  in 
  well-developed 
  males, 
  by 
  the 
  diagonal 
  convexity 
  of 
  the 
  eye 
  

   canthus, 
  by 
  the 
  lateral 
  serrations 
  of 
  the 
  pronotum 
  appearing 
  as 
  

   thickenings 
  of 
  a 
  single 
  sharp 
  margin, 
  and 
  by 
  the 
  second 
  elytral 
  stria 
  

   all 
  but 
  disappearing 
  at 
  twice 
  the 
  length 
  of 
  the 
  scutellum. 
  In 
  serratus 
  

   the 
  serrations 
  of 
  the 
  pronotal 
  margin 
  arise 
  between 
  the 
  two 
  edges 
  of 
  

   the 
  doubly 
  carinate 
  margin 
  and 
  the 
  second 
  elytral 
  stria 
  becomes 
  

   indistinct 
  opposite 
  the 
  apex 
  of 
  the 
  scutellum. 
  

  

  Bolbocerastes 
  serratus 
  (LeConte), 
  new 
  combination 
  

  

  Figure 
  14, 
  /; 
  Plate 
  4 
  

  

  Alhyreus 
  serratus 
  LeConte, 
  Proc. 
  Acad. 
  Nat. 
  Sci. 
  Philadelphia, 
  vol. 
  7, 
  p. 
  80, 
  1854. 
  

   Amechanus 
  serratus 
  Horn, 
  Trans. 
  Amer. 
  Ent. 
  Soc, 
  vol. 
  3, 
  p. 
  48, 
  1870. 
  

   Bradycinetus 
  serratus 
  Horn, 
  Proc. 
  California 
  Acad. 
  Sci., 
  ser. 
  2, 
  vol. 
  4, 
  p. 
  334, 
  1894. 
  

   Athyreus 
  (Bradicinetus) 
  serratus 
  Boucomont, 
  in 
  Wytsmann, 
  Genera 
  insectorum, 
  

  

  fasc. 
  7, 
  p. 
  8, 
  1902. 
  

   Bradycinetus 
  serratus 
  Schaeffer, 
  Trans. 
  Amer. 
  Ent. 
  Soc, 
  vol. 
  32, 
  p. 
  251, 
  1906. 
  

   Bradycinetulus 
  serratus 
  Cockerell, 
  Ent. 
  News, 
  vol. 
  17, 
  p. 
  242, 
  1906. 
  

   Bolboceras 
  (Amechamus) 
  serratus 
  Boucomont, 
  Ann. 
  Soc. 
  Ent. 
  France, 
  vol. 
  79, 
  

  

  p. 
  341, 
  1910. 
  

  

  Bolbocerastes 
  serratus 
  (LeConte) 
  and 
  B. 
  imperialis 
  Cartwright, 
  ex- 
  

   cept 
  for 
  fully 
  developed 
  males, 
  are 
  frequently 
  difficult 
  to 
  separate. 
  

   The 
  locality 
  label 
  will 
  help 
  in 
  most 
  cases 
  since 
  serratus 
  is 
  found 
  east 
  of 
  

   New 
  Mexico, 
  while 
  imperialis 
  is 
  found 
  in 
  California, 
  Arizona, 
  and 
  

   rarely 
  into 
  west 
  Texas. 
  The 
  maps 
  (figs. 
  15 
  and 
  16) 
  show 
  the 
  known 
  

   distribution. 
  In 
  doubtful 
  cases 
  the 
  male 
  genitalia 
  will 
  separate 
  the 
  

   two 
  (see 
  fig. 
  14,/ 
  and 
  g). 
  In 
  serratus, 
  the 
  basal 
  side 
  or 
  fl^oor 
  of 
  the 
  

   cavity 
  is 
  formed 
  by 
  the 
  two 
  sides 
  approaching 
  each 
  other 
  with 
  knife- 
  

   edges, 
  sharply 
  angulate 
  near 
  the 
  outside 
  margin 
  (in 
  Bolbocerastes 
  the 
  

   aedeagus 
  of 
  the 
  male 
  is 
  hooded 
  apically 
  by 
  the 
  two 
  sides 
  coming 
  together 
  

  

  