NORTH AMERICAN GEOTRUPINAE — ^HOWDEN 189 



Head with tubercles moderate, those of eye canthi upturned, horn 

 of vertex not long, rather slenderly conical when viewed from posterior, 

 tip not bifid. Pronotal modification of holotype with moderately 

 developed transverse carina broadly, shallowly emarginate; lateral 

 limiting grooves small; lateral carinae well developed, rather elongate. 



Genital capsule (pi. 3, fig. 4) with blunt lateral lobes, similar to B. 

 pusillum. Lateral lobes 1.2 times as long as wide and tipped with a 

 few long setae. 



Allotype: Female, length 9.2 mm., greatest width 6.5 mm. 



Marldngs similar to holotype except that the unusual lateral black 

 band on the pronotum is much more pronounced; also the transverse 

 carina, lateral carinae, and lateral limiting grooves are black. Vertex, 

 clypeus, and pronotum more heavily punctured in allotype than in 

 holotype. Pronotal modification with entire declivity heavily 

 punctured. Foretibia armed with eight external teeth. 



Head of allotype without tubercles or horn, but with small trans- 

 verse carina, sharply delimited and evenly arcuate. Lateral limiting 

 grooves and lateral carinae small, but noticeable. 



Holotype, male, El Paso, Tex. (USNM 61682). Allotype, 

 female, Texas (Howden). 



Variation in the two specimens seen is mainly evident in the larger 

 and more pronounced black areas on the pronotum of the female. 



Bolhocerosoma cartwnghti can be easily distinguished by the blackish 

 or black lateral portions of the pronotal margin which are not to be 

 noted on any other species. In the male the area is only brownish 

 black, but in the female the area is entirely black and extends from 

 the anterior to posterior angles and inward over 1 mm. 



Other distinguishing characteristics are: The accessory punctures 

 along elytral suture, the large number of long erect yellow setae on 

 dorsal surface, the median dentiform point formed by black band on 

 posterior margin of pronotum, and the oblong postmedian elytral 

 spots which are similar in shape to those of B. confusum. 



This interesting species is named in honor of O. L. Cartwright, who 

 has been of tremendous aid by furnishing many specimens, checking 

 identifications, answering numerous questions, and checking the 

 manuscript, 



Bolhocerosoma elongatunif new species 



Holotype: Male, length 10.5 mm., greatest width 6.5 mm. 



Dorsum reddish orange marked with black as follows: Vertex, eyes, 

 eye canthi, tubercles, margins of clypeus, apical pronotal margin 

 between lateral carinae, tips of tubercles of lateral and transverse 

 carinae, thin line on the extreme posterior margin of pronotum extend- 

 ing no farther than elytral margins, extreme base of elytra, scutellum, 

 sutural intervals, posterior portion of adjacent intervals, and vague 



