﻿108 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  io3 
  

  

  Allotype 
  and 
  paratypes. 
  — 
  Allotype 
  and 
  97 
  paratypes 
  bear 
  data 
  as 
  

   follows: 
  Nevada: 
  1, 
  Hawthorn, 
  June 
  8, 
  1943, 
  Wallace; 
  1, 
  Mount 
  

   Charleston, 
  8,000-10,000 
  feet, 
  Aug. 
  6, 
  1944, 
  Zinn. 
  

  

  California: 
  2, 
  Baker, 
  Mar. 
  27, 
  1935, 
  and 
  April 
  1935, 
  Saylor; 
  1, 
  

   California 
  (State 
  label 
  only); 
  3, 
  Coachella, 
  May 
  12, 
  13, 
  17, 
  1927, 
  Van 
  

   Duzee; 
  3, 
  Coachella, 
  Riverside 
  County, 
  Apr. 
  28, 
  1928, 
  May 
  9, 
  1927, 
  

   July 
  15, 
  1927, 
  Wymore; 
  2, 
  Coachella 
  Valley, 
  May 
  9, 
  1927, 
  Van 
  Dyke, 
  

   Aug. 
  20, 
  1949, 
  V. 
  d. 
  Bosch; 
  1, 
  Coyote 
  Wells, 
  Imperial 
  County, 
  June 
  5, 
  

   1949, 
  Hurd; 
  1, 
  Essex, 
  Apr. 
  29, 
  1937; 
  1, 
  Holtville, 
  June 
  28, 
  1936, 
  

   Cazier; 
  14, 
  Imperial 
  County, 
  Carrizo 
  Light, 
  Mar. 
  14, 
  17, 
  18, 
  22, 
  1928, 
  

   Searl; 
  1, 
  Indian 
  Wells, 
  Riverside 
  County, 
  Apr. 
  25, 
  1939, 
  Martin; 
  

   8, 
  junction 
  of 
  Highways 
  78 
  and 
  99, 
  Imperial 
  County, 
  Apr. 
  15, 
  1944, 
  

   Tieman; 
  4, 
  Mecca, 
  Mar. 
  25, 
  1922, 
  Benedict; 
  3, 
  Murrays 
  Dam, 
  San 
  

   Diego 
  County, 
  Cottle; 
  1, 
  Needles, 
  Apr. 
  1, 
  1941, 
  Linsley; 
  2, 
  Palm 
  

   Springs, 
  May 
  20, 
  1905, 
  May 
  9, 
  1932; 
  2, 
  San 
  Clemente 
  Island, 
  Apr. 
  2, 
  3, 
  

   1939, 
  Channel 
  Islands 
  Biological 
  Survey, 
  Von 
  Bloeker; 
  1, 
  San 
  Diego 
  

   County, 
  Mar. 
  10, 
  1928, 
  light, 
  Well; 
  7, 
  Yermo, 
  San 
  Bernardino 
  County, 
  

   Apr. 
  11, 
  1936, 
  Comstock, 
  Sept. 
  6-30, 
  1939, 
  Pierce. 
  

  

  Arizona: 
  7, 
  Arizona 
  (State 
  label 
  only); 
  4, 
  Ehrenberg, 
  Oct. 
  18, 
  1938, 
  

   Mar. 
  21, 
  23, 
  30, 
  1939, 
  Parker; 
  6 
  (includes 
  allotype), 
  Gila 
  Bend, 
  Ma-. 
  1, 
  

   1930, 
  Lebart; 
  1, 
  Holbrook, 
  May 
  5, 
  1941, 
  Dukes; 
  1, 
  Navaho 
  County, 
  

   Duncan; 
  1, 
  Phoenix; 
  1, 
  Red 
  Rock, 
  Spring 
  1930, 
  Burdett; 
  1, 
  Tucson, 
  

   April 
  192-, 
  Duncan; 
  11, 
  Yuma, 
  February 
  1910, 
  Carlson, 
  Mar. 
  12, 
  18, 
  

   1912, 
  Slevin, 
  May 
  15, 
  1939, 
  Aitken. 
  

  

  Mexico, 
  Sonora: 
  1, 
  Choya 
  Bay, 
  Mar. 
  27, 
  1949, 
  Bradt; 
  1, 
  30 
  miles 
  

   southwest 
  of 
  Sonoyta, 
  500 
  feet. 
  Mar. 
  31, 
  1949, 
  Bradt; 
  4, 
  Puerto 
  

   Libertad, 
  Mar. 
  15, 
  1939, 
  Parker. 
  

  

  Paratypes 
  in 
  AMNH, 
  CAS, 
  LAC, 
  KAN, 
  MCZ, 
  CAL, 
  CU, 
  OSJ, 
  

   MICH, 
  INHS, 
  USNM, 
  and 
  the 
  private 
  collections 
  of 
  Mark 
  Robinson, 
  

   Henry 
  Howden, 
  C. 
  A. 
  Frost, 
  A. 
  T. 
  McClay, 
  F. 
  H. 
  Parker, 
  D. 
  K. 
  

   Duncan, 
  and 
  R. 
  H. 
  Arnett. 
  

  

  Remarks. 
  — 
  Bolbocerastes 
  regalis 
  varies 
  from 
  16 
  to 
  20 
  mm. 
  in 
  length 
  

   and 
  from 
  10 
  to 
  12.5 
  mm. 
  in 
  width. 
  It 
  is 
  closely 
  similar 
  to 
  B. 
  serratus 
  

   (LeConte) 
  but 
  the 
  males 
  differ 
  noticeably 
  in 
  having 
  a 
  higher, 
  wide, 
  

   truncate 
  clypeal 
  horn, 
  smoother, 
  less 
  punctate 
  pronotum, 
  and 
  on 
  each 
  

   side 
  a 
  doubly 
  angulate 
  inner 
  pronotal 
  carina 
  which 
  is 
  always 
  higher 
  

   in 
  the 
  middle. 
  In 
  B. 
  serratus 
  (LeConte) 
  the 
  anterior 
  clypeal 
  horn 
  is 
  

   bluntly 
  rounded, 
  the 
  pronotal 
  punctures 
  are 
  more 
  evident 
  throughout, 
  

   and 
  the 
  inner 
  lateral 
  pronotal 
  carina 
  is 
  not 
  doubly 
  angulate 
  or 
  higher 
  

   in 
  the 
  middle. 
  The 
  truncated 
  tops 
  of 
  the 
  anterior 
  and 
  median 
  horns 
  

   are 
  about 
  equal 
  in 
  width 
  in 
  females 
  of 
  B. 
  regalis 
  and 
  the 
  whole 
  anterior 
  

   part 
  of 
  the 
  head, 
  including 
  clypeal 
  and 
  cephalic 
  horns, 
  appears 
  higher 
  

   than 
  the 
  posterior 
  part, 
  like 
  an 
  elevated 
  snout. 
  The 
  lateral 
  horns 
  are 
  

   most 
  prominent 
  in 
  this 
  species. 
  

  

  