NORTH AMERICAN GEOTRUPINAE — ^HOWDEN 177 



KANSAS: 17 males, 9 females. Atchison County, Douglas County, Fort Leaven- 

 worth, Johnson County, Lawrence, Manhattan, Onaga, Wallace County, west 



Kansas; (2) June, (3) July, (2) August (3) September, 

 KENTUCKY: 8 males, 11 females. Lexington, Louisville, Nicholasville, Paris, 



Princetown, Sadieville; (3) May, (1) June, (3) July, (3) August, (5) September, 



(2) October. 

 MICHIGAN: 2 males, 4 females. Detroit, Livingston County, Macatawa 



Beach; (1) May, (1) July. 

 MINNESOTA: 5 males, 3 females. Fort Snelhng, Minneapolis, Red Wing, St. 



Paul; (1) June, (1) July. 

 MISSOURI: 12 males, 8 females. Aflfton, Columbia, Kirkwood, New Hartford, 



St. Louis, Springfield, Willard; (2) May, (4) June, (4) July, (2) August, (2) 



October. 

 NEBRASKA: 2 males, 4 females. Bennet, Lincoln, Malcolm, Norfolk; (2) June, 



(1) September. 

 NEW MEXICO: 1 male. No data. 



OHIO: 4 males, 2 females. Columbus, Pickaway County; (1) June. 

 OKLAHOMA: 1 male. Wichita National Forest; (1) June. 

 SOUTH DAKOTA: 5 males, 3 females. Elk Point, Interia (Stanley County), 



Volga; (1) June, (1) August. 

 TEXAS: 2 males, 3 females. Fedor. 

 WISCONSIN: 8 males, 10 females. Gaj's Mills, Madison, Milwaukee, Neills- 



ville, Oshkosh, Racine; (1) April, (2) May, (9) June, (1) July, (1) August, (2) 



September, (1) October. 

 WYOMING: 1 male, 1 female. Bridger Basin. 



Bolbocerosoma hamatum Brown 



Bolbocerosoma hamatum Brown, 1929, p. 213. Type, male, Georgia (CU). 



Length 10 to 11 mm.; greatest width 7 to 8 mm. 



Dorsum reddish brown, male marked with black as follows : Vertex, 

 eye canthi, margin of clypeus, tubercles and limiting concavities of 

 pronotal carina, entire anterior margin of pronotum, broad band on 

 pronotal base between the elytral humeri, scutellum, extreme base of 

 elytra except the humeri, sutural intervals, and about two-thirds of 

 each elytron with an area extending from humerus and sutural interval 

 at basal fom-th to apex, not including the apical umbone; ventral sur- 

 faces light orange-yellow; outer margin of tibia blackish brown. 

 Female with markings similar to male, except on the elytron where the 

 large posterior black elytral markings are only vaguely confluent with 

 black elytral margin; a thin brownish red band running just above 

 elytral margin nearly to apex. Vertex coarsely, sparsely punctured, 

 punctures of clypeus irregular, dense, sometimes confluent. Prono- 

 tum rather heavily, coarsely, irregularly punctured medially, poste- 

 rior black area lacking punctures except at anterior edge, lateral por- 

 tions of pronotum with punctures becoming finer, dense and feebly 

 impressed, more so anteriorly. Minute secondary punctures evenly 

 distributed over pronotum. Declivity of pronotal modification 

 coarsely, indistinctly, and sparsely punctured only in lower half. 



