OF WASHINGTON. 135 



rated. When compared directly with the types of this last 

 species, however, it is seen to be amply distinct. The three 

 species of the genus may be separated as follows : 



1. Tegmina present 2 



Tegmina absent nudus Walker. 



2. Cerci of the male about two and one-half times as long as the basal 



width, reaching the tap of the supra-anal plate and apically curved 

 somewhat downward; pronotal disk of both sexes transversely 

 convex, passing insensibly into the lateral lobes without indication 



of lateral carinse montanus Bruner. 



Cerci of the male no more than twice as long as the basal width, 

 scarcely attaining the tip of the supra-anal plate and in no way 

 apically decurved ; pronotal disk of both sexes transversely less 

 convex above, passing more abruptly into the lateral lobes, forming 

 distinct but rounded lateral carinae rainier ensis, n. sp. 



In coloration rainierensis is similar to montanus, except that the 

 infuscation on the lateral lobes of the pronotum does not extend so 

 far downwards, making a more distinct lateral stripe. The abdomen 

 above is usually broadly yellow, rarely with a narrow broken dark 

 median line. The frontal costa of the female is more distinctly sulcate 

 than in montanus, and the eyes are not so widely separated, the inter 

 space being about three times as broad as the basal segment of the 

 antennae, while in montanus it is about four times as broad. The pos 

 terior margin of the pronotum is angularly concave, much more so, 

 especially in the female, than that of either montanus or nudus. 



The measurements of a mature pair chosen as types from a large 

 number of specimens are as follows : Length, antennae, male and female, 

 7 mm.; pronotum, male, 3.5 mm., female, 4.5 mm.; posterior femora, 

 male, 9 mm., female, II mm. 



Type. No. 10707, U. S. National Museum. 



There is little variation in size. The color of living speci 

 mens is very different and much brighter than that of speci 

 mens preserved either pinned or in spirits, no matter how well 

 prepared by stuffing. 



Out of nearly one hundred specimens of both sexes ex 

 amined, but one specimen was found with either elytron miss 

 ing, that one a female with the left elytron gone. Professor 

 Scudder states that one half or more of all specimens of 

 montanus seen by him had one of the tegmina gone. This is 

 not true, however, of the few specimens of that species seen 

 by me. 



