﻿BOLBOCERATINI 
  OF 
  THE 
  UNITED 
  STATES 
  — 
  CARTWRIGHT 
  101 
  

  

  Specimens 
  examined. 
  — 
  349. 
  

  

  Distribution. 
  — 
  California: 
  Sequoia 
  National 
  Park, 
  Napa, 
  Kaweah, 
  

   Camp 
  Greely 
  (Tulare 
  County), 
  Mendocino, 
  Mokelumne 
  Hill, 
  Camp 
  

   Greely 
  (Fresno 
  County), 
  Three 
  Eiders, 
  El 
  Dorado 
  County, 
  Coulter- 
  

   v^ille, 
  Sonoma 
  County, 
  Potwisha, 
  San 
  Joaquin 
  Experiment 
  Station 
  

   (Madera 
  County), 
  Mount 
  Diablo, 
  Sacramento, 
  Mineralking, 
  La 
  Jon 
  

   Pass, 
  Kattlesnake 
  (Placer 
  County), 
  *Cala7eras 
  County, 
  and 
  *0'Neals 
  

   (Madera 
  County). 
  Baja 
  California: 
  Hamilton 
  Ranch. 
  

  

  Season. 
  — 
  January 
  19 
  to 
  May 
  8, 
  with 
  greatest 
  number 
  in 
  April. 
  

  

  Genus 
  Brady 
  cinetulus 
  Cockerell, 
  1906 
  

  

  Bolboceras 
  Kirby 
  (in 
  part), 
  Trans. 
  Linn. 
  Soc. 
  London, 
  vol. 
  12, 
  pt. 
  2, 
  p. 
  459, 
  1818. 
  

  

  (Type 
  not 
  designated.) 
  

   Amechanus 
  Horn 
  (not 
  Thomson, 
  1864), 
  Trans. 
  Amer. 
  Ent. 
  Soc, 
  vol. 
  3, 
  p. 
  48, 
  

  

  1870. 
  

   Bradycinetus 
  Horn 
  (not 
  Sars, 
  1865), 
  Trans. 
  Amer. 
  Ent. 
  Soc, 
  vol. 
  3, 
  p. 
  334, 
  1871. 
  

   Bradycellus 
  Schaeffer 
  (not 
  Erichson, 
  1837), 
  Trans. 
  Amer. 
  Ent. 
  Soc, 
  vol. 
  32, 
  p. 
  

  

  249, 
  1906. 
  

   Bradycinetulus 
  Cockerell, 
  Ent. 
  News, 
  vol. 
  17, 
  p. 
  242, 
  1906. 
  (Type 
  not 
  designated.) 
  

  

  The 
  genus 
  Bolboceras 
  was 
  erected 
  by 
  Kirby 
  in 
  1818 
  for 
  the 
  eight 
  

   species 
  Scarabaeus 
  mobilicornis 
  Linnaeus, 
  S. 
  mobilicornis 
  vax. 
  tes- 
  

   taceus 
  Fabricius, 
  S. 
  guadridens 
  Fabricius, 
  S. 
  farctus 
  Fabricius, 
  S. 
  

   lazarus 
  Fabricius, 
  S. 
  cyclops 
  Olivier, 
  *S'. 
  cephus 
  Fabricius, 
  and 
  Bol- 
  

   boceras 
  australasiae 
  Kirby. 
  Technically 
  no 
  genotype 
  was 
  designated 
  

   although 
  he 
  wrote, 
  "My 
  details 
  of 
  Bolboceras 
  were 
  taken 
  from 
  B. 
  

   quadridens." 
  Nearly 
  all 
  of 
  the 
  species 
  mentioned 
  have 
  since 
  been 
  

   moved 
  to 
  other 
  genera. 
  Curtis, 
  1829 
  (British 
  Ent., 
  vol. 
  1, 
  pt. 
  1, 
  p. 
  

   74), 
  selected 
  the 
  species 
  Scarabaeus 
  mobilicornis 
  Fabricius 
  as 
  the 
  type 
  

   of 
  Bolboceras. 
  Therefore, 
  since 
  our 
  species 
  of 
  Odontaeus 
  are 
  con- 
  

   generic 
  with 
  mobilicornis, 
  they 
  now 
  take 
  the 
  generic 
  name 
  Bolboceras 
  

   and 
  it 
  becomes 
  necessary 
  to 
  find 
  an 
  available 
  name 
  for 
  those 
  species 
  

   we 
  have 
  formerly 
  placed 
  in 
  Bolboceras. 
  A 
  search 
  of 
  the 
  literature 
  

   indicates 
  that 
  name 
  must 
  be 
  Bradycinetulus, 
  as 
  shown 
  in 
  the 
  

   synonymy. 
  

  

  Characters 
  for 
  Bradycinetulus, 
  in 
  addition 
  to 
  those 
  listed 
  in 
  the 
  key 
  

   to 
  genera, 
  include 
  the 
  following: 
  The 
  mandibles 
  are 
  evenly 
  arcuate 
  ex- 
  

   ternally; 
  the 
  median 
  prominence 
  of 
  the 
  pronotum 
  is 
  developed 
  into 
  a 
  

   pair 
  of 
  horns 
  in 
  the 
  male; 
  the 
  scutellum 
  is 
  wider 
  than 
  long 
  and 
  dis- 
  

   tinctly 
  punctate 
  with 
  fine 
  to 
  moderate 
  punctures; 
  and 
  the 
  posterior 
  

   vertical 
  face 
  of 
  the 
  prosternal 
  intercoxal 
  piece 
  is 
  wide 
  and 
  flat, 
  with 
  

   the 
  ventral 
  edge 
  evenly 
  arcuate 
  or 
  slightly 
  angulate 
  at 
  middle. 
  The 
  

   three 
  species 
  placed 
  here 
  are 
  all 
  large, 
  17 
  to 
  21 
  mm. 
  in 
  length 
  by 
  10 
  

   to 
  12 
  mm. 
  in 
  width. 
  They 
  are 
  sufficiently 
  differentiated 
  in 
  the 
  follow- 
  

   ing 
  key. 
  

  

  Genotype 
  . 
  — 
  Scarabaeus 
  ferrugineus 
  Palisot 
  de 
  Beauvois, 
  1 
  809 
  . 
  (Pres- 
  

   ent 
  designation.) 
  

  

  