346 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



In other specimens the humeri are obtusely rounded and the su- 

 perior epipleural margin is often visible from above, the thorax 

 wider and more evenly rounded at the sides, and the general form 

 resembles pcn-ricollis. The integuments are more or less opaque. 



Fuclis'ti appears to be intermediate between consohrina and parci- 

 collis. I at first associated, it with the former and then with the lat- 

 ter as a race, but could not satisfy myself as to which species it is 

 most closely related, and therefore determined on the intermediate 

 course and give it specific standing. 



It can be recognized from consohrina by the more finely and much 

 less densely sculptured abdomen and more cordate prothorax; from 

 jjarvicollis by the narrower prothorax and the more consohrlna-Wk^Q 

 habitus. 



From neotomiv it is separated by the much less convex form and 

 less strongly sculptured abdomen. 



Product a has a much more transverse prothorax, the humeri 

 strongly prominent with the superior epipleural margin very dis- 

 tinctly visible from above, the elytra very evidently flattened, form 

 oblong-oval and l)road at base. The males are more difficult to sepa- 

 rate, the sides of the pronotal disc are usually distinctly flattened and 

 granulate; in fiiclidi the pronotal disc is not usually depressed at the 

 sides and quite strongly and evenly convex. 



Hornil is more depressed, with very oval elytra, the humeri being 

 obsolete. 



General ohserrafions. — The mentum is usually parabolic in out- 

 line, although at times somewhat triangular; the surface is rather 

 narrowly convex at middle from apex to base and more or less 

 broadly foveate laterally, finely scabrous, punctures not distinctly 

 defined and not noticeably setigerous. 



The prosternum is quite gradually prominent from the anterior 

 margin so that the intercoxal process is not strongly nor suddenly 

 protuberant ventrally; at times it is evenly arcuate antero-posteriorly 

 or feebly arcuate between the coxae and subtruncate behind, with the 

 mucro more or less produced or small and more or less deflexed. 



Mesosternum more or less vertically arcuate and with a varying 

 concavity. 



The metasternum laterally between (he cox.t is as long as the width 

 of a mesotibia at middle. 



The abdominal process is more or less quadrate and a third (male) 

 to a fourth (female) of its wadth broader than the metasternal 

 salient, as long as the second segment in the male and to the post- 

 coxal part of the first segment, as well as the third, in the female. 



In the male the post-coxal part of the first segment is equal to the 

 length of the third, the latter about a fourth longer than the fourth. 

 In the female the second is twice as long as the fourth. 



1 



