NORTH AMERICAN COLEOPTERA. 117 



lateral umbone, the angles rather prominent, the last segment with entire mar- 

 gin ; prosternum not lohed in front ; anterior femur with an acute, not serrulate 

 tooth. Length .44 - .58 inch ; 11 - 14.5 inm. (Fig. 238.) 



Male. — Antennae hipectinate (,238) from the fourth joint, the posterior or infe- 

 rior branch a little longer, terminal joint bifurcate; prosternum convex, coar.sely 

 sparsely punctured ; anterior tibia (242) slightly arcuate, very vaguely sinuate on 

 its inner edge ; middle tibia slightly arcuate, the posterior straight ; last ventral 

 segment (240) very vaguely emarginate at middle truncate each side ; last dorsal 

 short, coarsely punctate and entire. 



Female. — Antennae simply serrate, the lower edge, however, broader than usual ; 

 pro.sternum as in the male ; anterior tibia scarcely arcuate, the middle and poste- 

 rior straight; last ventral segment (241) sinuately truncate; last dorsal coarsely 

 punctate, entire. 



The dark markings on the elytra seem quite constant, and. are in 

 a general way as represented in the figure. The color of the body 

 beneath is as above. The male antennas present an unique structure 

 in the genus. 



Five specimens have been examined, one only a male. It occurs 

 in Arizona and New Mexico. 



49. C Ulkei Lee. — Form of atrifasciata, deep blue, the elytra with darker 

 spaces as in that species ; thorax more than twice as wide as long, widest behind 

 the middle, the sides in front rather oblique, posteriorly strongly]arcuate. Length 

 .60 inch ; 15 mm. (Fig. 243.) 



This species is so closely related to the preceding that a few words 

 of description with some comparative remarks are all that seem 

 necessary. The foveas of the head, of which Dr. LeConte speaks, 

 are merely the spaces above and below the W-like line, which is less 

 elevated than in atrifasciata. The thorax is otherwise formed as 

 shown in the outline, although this is really less of a variation than 

 may be observed in such 'species as femorata. The sculpture of the 

 surface is less marked and the punctures less dense, Avhile those of 

 the elytra are rather finer and closer than in atrifasdata. 



The only specimen I have seen is the type kindly loaned me by 

 Mr. Ulke. It is a female, and the ventral segments are as in atri- 

 fasciata. The antennae, however, present the usual form observed 

 in the genus, the free angles being truncate and not at all acute, 

 while the lower edge is no broader than normal. The antennal 

 structure alone induces me to retain the species as distinct, otherwise 

 I should have considered it an unusually stout female of atrifasciata, 

 as indeed it may ultimately prove to be. 



One specimen, Texas. 



