EEVISION OF ELEODTTNT — BLAISDELL. 71 



United States specimens leaves the relationships in doubt, a knowl- 

 edge of the Mexican contingent would undoubtedly be more elucida- 

 tive. At present knaxsii appears as a derivative of obsoleta. 



The mentum is more or less trapezoido-parabolic, rather densely 

 punctate and subfoveate laterally, somewhat convex at the middle; 

 the seta? are scarcely evident. 



The prosternum is moderately produced l)ehind, feebly convex or 

 horizontal between the coxa* and triangularly dilated behind the 

 median transverse axis of the acetabula ; the mucro is small, at times 

 the process is compressed and more or less vertically truncate behind. 



The mesosternum is quite vertically declivous and more or less 

 feebly concave. 



The intercoxal process of the abdomen is subquadrate (male) or 

 sliglitly transverse (female), and about a fourth (male) or a third 

 (female) of its width wider than the metasternal salient. 



The metasternum laterally between the coxse is as long as the width 

 of a mesotibia at apical third. 



The post-coxal part of the first abdominal segment is subequal 

 (male) or equal (female) in length to that of the process. 



In the male the second segment is equal to the length of the process ; 

 the third is about equal to the post-coxal part of the first ; the fourth 

 is about two-thirds as long as the second. 



In the female the second segment is about twice as long as the 

 fourth, the third is equal to the post-coxal portion of the first. 



The legs are noticeably short. 



The profemora of the male are moderately clavate and feebly com- 

 pressed; in the female feebly tumid and moderately compressed; the 

 tibial grooves are limited by feeble but distinct subcariniform mar- 

 gins which meet and become evanescent at the basal -fourth. 



In both sexes the meso and metafemora are quite similar. The 

 mesofemora have the surface lines feebly but distinctly arcuate, and 

 the femora in outline ma}^ be said to be subfusiform. The meta- 

 femora have the superior and inferior surface lines quite parallel. 

 The grooves are limited by asperulate margins which converge at 

 basal third on the mesofemora and become evanescent, while on the 

 metafemora they become evanescent about the middle without be- 

 coming contiguous. 



The tibiae are all more or less feebly arcuate, and rather more 

 strongly widened apically than is usually observed ; the tarsal grooves 

 are absent and the articular cavities are closed. The protibia? are 

 observed to be feebly compressed or subcylindrical. 



The tarsi are moderately long and rather stout when considered in 

 a comparative sense. The protarsi of the male are about a fourth 

 longer than those of the female. 



