﻿BOLBOCERATIIsTI 
  OF 
  THE 
  UNITED 
  STATES 
  — 
  CARTWRIGHT 
  111 
  

  

  Peak, 
  Rincon, 
  Baboquivari 
  Mountains, 
  Aug. 
  1, 
  4, 
  1916, 
  about 
  1,050 
  

   feet; 
  1, 
  Littlefield 
  ; 
  1, 
  Marinette, 
  Aug. 
  4, 
  1918, 
  Schiffel; 
  1, 
  Olberg, 
  

   Sept. 
  13, 
  1936, 
  Crandall; 
  1, 
  Palmerlee; 
  8, 
  Phinax 
  (sic), 
  September 
  

   and 
  November 
  1921; 
  17, 
  Phoenix, 
  Sept. 
  12, 
  1935, 
  Crandell, 
  May 
  12, 
  

   1934, 
  Parker, 
  May 
  29, 
  1922, 
  Odell, 
  Aug. 
  2, 
  1917, 
  CU 
  Biol. 
  Expedition, 
  

   May 
  17, 
  1944, 
  Parker, 
  Apr. 
  29, 
  1941, 
  Parker, 
  May 
  7, 
  1918, 
  Bradley, 
  

   Sept. 
  12, 
  1926; 
  1, 
  Pima 
  County, 
  Sept. 
  1, 
  1925, 
  Marsh; 
  1, 
  Prescott; 
  2, 
  

   Sacoton, 
  Oilman; 
  1, 
  SafFord, 
  September 
  (no 
  date 
  given), 
  Duncan; 
  

   2, 
  San 
  Bernardino 
  Ranch, 
  Cochise 
  County, 
  3,600 
  feet, 
  sycamore- 
  

   willow 
  in 
  valley 
  at 
  light, 
  July 
  25, 
  1949, 
  Werner 
  and 
  Nutting, 
  July 
  16, 
  

   1949, 
  light, 
  Parker; 
  1, 
  San 
  Luis, 
  Yuma 
  County, 
  Aug. 
  11, 
  1940; 
  1, 
  

   Talklai, 
  Pollock; 
  20, 
  Tucson, 
  July 
  21 
  (no 
  year 
  given) 
  Hubbard 
  and 
  

   Schwarz, 
  July 
  30, 
  1937, 
  Parker, 
  August 
  1912, 
  Breitenbecker, 
  Aug. 
  20, 
  

   1932, 
  Flock, 
  August 
  1935, 
  Wharton, 
  October 
  1927, 
  Hamilton 
  (2,500 
  

   feet), 
  July 
  10, 
  1950, 
  Aug. 
  8, 
  1950, 
  Bradt, 
  Oct. 
  14, 
  1919; 
  3, 
  Wellton, 
  

   June 
  13, 
  1939, 
  at 
  light, 
  Stitt; 
  1, 
  Welton, 
  Aug. 
  9, 
  1917, 
  Wheeler 
  leg.; 
  

   1, 
  Yuma. 
  

  

  California: 
  7, 
  Blythe, 
  May 
  19, 
  1942, 
  Allen, 
  Aug. 
  26, 
  Hurd, 
  April 
  

   16, 
  1945, 
  Constantine, 
  May 
  19, 
  1943, 
  Vargas, 
  July 
  22, 
  1947, 
  July 
  8, 
  

   1947; 
  4, 
  Blythe, 
  Riverside 
  County, 
  July 
  24, 
  1947, 
  Aug. 
  24, 
  1947, 
  

   MacSwain; 
  2, 
  California 
  (State 
  label 
  only); 
  29, 
  Coachella, 
  Riverside 
  

   County, 
  Apr. 
  28, 
  1927, 
  May 
  9, 
  12, 
  17, 
  28, 
  1927, 
  Wymore, 
  May 
  22, 
  

   1928, 
  Van 
  Dyke, 
  May 
  13, 
  1917, 
  Van 
  Duzee; 
  2, 
  Coachella 
  Valley, 
  

   Sept. 
  8, 
  1929, 
  Comstock, 
  Aug. 
  20, 
  1949, 
  v. 
  d. 
  Bosch; 
  1, 
  El 
  Centro, 
  

   Aug. 
  28, 
  1948, 
  light 
  trap; 
  8, 
  Holtville, 
  June 
  1936, 
  Ross, 
  August 
  (no 
  

   date 
  given), 
  Craig, 
  June 
  28, 
  1936, 
  Cazier, 
  June 
  27, 
  1936, 
  July 
  15, 
  

   1936; 
  16 
  (includes 
  allotype). 
  Imperial 
  County, 
  June 
  1912, 
  on 
  Experi- 
  

   ment 
  Farm, 
  Bridwell; 
  4, 
  Imperial 
  County, 
  June 
  1925, 
  Field, 
  July 
  1, 
  

   1925, 
  Gehring; 
  2, 
  Indio, 
  July 
  17, 
  1923, 
  Benedict, 
  May 
  23, 
  1919, 
  

   Slevin; 
  2, 
  Meloland, 
  June 
  4, 
  7, 
  1949, 
  v. 
  d. 
  Bosch; 
  1, 
  Needles, 
  June 
  

   12, 
  1940, 
  Barr; 
  1, 
  Neighbors, 
  Apr. 
  27, 
  1930, 
  Hornung; 
  1, 
  Palo 
  Alto, 
  

   July 
  28, 
  1916; 
  1, 
  Vallecito, 
  San 
  Diego 
  County, 
  Sept. 
  15, 
  1945, 
  at 
  light, 
  

   Martin; 
  2, 
  Warners, 
  June 
  18, 
  1925. 
  

  

  Mexico: 
  3, 
  10 
  miles 
  south 
  of 
  Catavina, 
  Baja 
  California, 
  July 
  29, 
  

   1938, 
  Michelbacher 
  and 
  Ross. 
  

  

  Paratypes 
  in 
  CAS, 
  LAC, 
  AMNH, 
  CARN, 
  INHS, 
  CAL, 
  OSU, 
  CU, 
  

   MICH, 
  TEX, 
  KAN, 
  CDA, 
  USNM, 
  and 
  the 
  private 
  collections 
  of 
  

   R. 
  H. 
  Arnett, 
  D. 
  K. 
  Duncan, 
  C. 
  A. 
  Frost, 
  P. 
  C. 
  Grassman, 
  Henry 
  

   Howden, 
  A. 
  T. 
  McClay, 
  Gayle 
  H. 
  Nelson, 
  F. 
  H. 
  Parker, 
  Mark 
  

   Robinson, 
  and 
  F. 
  Werner. 
  

  

  Remarks. 
  — 
  Males 
  of 
  B. 
  imperialis 
  vary 
  from 
  11 
  to 
  19 
  mm. 
  in 
  length, 
  

   and 
  from 
  7 
  to 
  11 
  mm., 
  in 
  width. 
  In 
  lesser 
  developed 
  males 
  the 
  punc- 
  

   tures 
  become 
  fewer 
  and 
  weaker 
  over 
  the 
  posterior 
  third 
  inside 
  the 
  

   arcuate 
  carina 
  at 
  back 
  of 
  the 
  head, 
  anteriorly 
  they 
  persist 
  strongly; 
  

  

  