102 THOS. L. CASEY. 



1 . Throughout Lsemo^Mceus, Lathropus, Dendrophagna and Brontes, 

 the males are distinguished from the females by the larger size of the 

 former, as well as by their longer and more slender antennae. 



2. Whenever there is a difference in the length of the first joint of 

 the antennae owing to sex, the male has this joint the longer. 



Coming within closer range, and considering the special sexual charac- 

 iers of Brontes, we have the following facts : 



1. In the male the elytra are much more truncate at the posterior ex- 

 tremities than are those of the female. 



2. The last abdominal segment of the female is about equal in length 

 to the fourth, while in the male the last abdominal segment is nearly 

 twice the length of the fourth. 



We have therefore two general and two special sexual characters, the 

 latter in a genus acknowledged to be very closely allied to Hemipeplus. 



In Hcmipeplus marginipennis, the larger specimens with elongate pro- 

 thorax, differ from the smaller with quadrate prothorax in the following 

 points : 



1. In the former the antennae are longer and proportionally more 

 slender. 



2. In the former the first joint of the' antennae is much elongated, 

 while in the latter the first joint is nearly sub-globular. 



3. The elytra of the former are very much more squarely truncated 

 behind than are those of the latter. 



4. The fifth abdominal segment in the former is longer than the fourth, 

 while in the latter it is equal in length to the fourth. 



One of the larger specimens which I have examined happened to have 

 the sexual appendage protruding, and I have dissected a small specimen 

 and examined the corresponding appendage. On comparing these with 

 the penis and ovipositor of Brontes, respectively, I find a general resem- 

 blance, although it is not so satisfactory as the conclusion derived from 

 the general considerations given above. 



. Sub-family V.— TELEPHAXINAE. 



This sub-family comprises two tribes, each of which consists of but a 

 single genus. These tribes may be distinguished as follows : 



Last joint of maxillary palpi securiform I. Tklephani.m. 



Last joint of maxillary palpi acuminate II. Cryptamobphini. 



Tribe I. — Telephanini. 

 One genus has thus far been described from the regions here considered. 



