AMERICAN COMPONENTS OF THE TENTYRIINyE 457 



many more still undiscovered. The almost completely denuded 

 type of inflatiis has remaining only the short sparse and coarse 

 recurved hairs, but slight indication of erect discal hairs remain- 

 ing, though a more enlarged view seems to show that there may 

 have been erect hairs, represented by apparently broken stumps. 

 The second specimen, from Colorado, is even more completely 

 denuded and differs from the New Mexican type in a number 

 of features, such as the less transverse and more coarsely punc- 

 tate prothorax and the more circular and less coarsely punctate 

 elytra, but some of these differences may be sexual and, as they 

 both have the peculiar longitudinal rugulosity of the head dis- 

 tinguishing the species from rotundns and globosus, I have con- 

 cluded to regard them as constituting a form allied to 7'otundus 

 but specifically distinct, although I am unable to describe the 

 vestiture satisfactorily. This does not appear to be particularly 

 easy to remove, as shown by all the other specimens before me, 

 and the condition of these two examples of injlatus is therefore 

 somewhat mystifying. 



Tribe Craniotini. 



To state the various phylogenetic lines of affinity of Craniotus 

 with other groups, from some of which it departs very widely 

 in habitus, would require extended space, out of keeping with 

 the superficial character of the present practically pioneer work 

 in the Tentyriinae, but the living group to which it is most 

 closely allied is, singularly enough, the old world Adesmiini, 

 and the resemblance here is very pronounced in general facies. 

 It however also has some relationship with Edrotes, notwith- 

 standing its very different form of body, and it may be said, in 

 this connection, that the Mexican Piineliofsis, closely related to 

 Edroies^ is to some extent intermediate in that respect, especi- 

 ally in its less rotund outline, more differentiated prothorax and 

 faint elevated lines on the elytra. With the Adesmiini it is par- 

 ticularly allied in the form and position of the coxas, short, 

 unevenly convex metasternum, form of the met-episterna, gen- 

 eral outline of the body and long slender legs, although differ- 

 ing completely in the epipleuras, which in Adesmia are narrow 

 though subequal in width throughout and entire. The side 



Proc. Wash. Acad. Sci., October, 1907. 



