SHORT STUDIES OF NORTH AMERICAN TRYXALIN^. 



By Samuel H. Scudder. 



Received June 6, 1899. Presented June 14, 1899. 



The review of a large series of Tryxalinaj collected on the Pacific 

 coast iu 1897 by Mr. A. P. Morse, and kindly placed unreservedly in 

 my hands, has provoked a re-examinatiou of the sj^ecies in a number of 

 genera scattered through the group. I have published elsewhere (Can. 

 Ent., XXXI. 177) a review of our species of Orphulella, and here gather 

 together other miscellaneous studies, all referring to the Tryxalinoe. 



1. The United States Species of Mermiria. 



A recent study of our Mermiria^ has brought to light a couple of new 

 species of Mermiria, and some slight extension of the known range of 

 some of the other species, so that I venture to publish the followiiio' 

 notes and descriptions, with a new table of the species, based primarily 

 on that published by McNeill. 



Table of the United States Sjyecies of Mermiria. 



fli. Head shorter than pronotum, or, if (rarely) as long, then the greatest width of 

 the fastigium is greater than its length beyond narrowest part of vertex ; last 

 ventral segment of male bluntly acuminate. 

 ii. Fastigium less prominent and blunter, its greatest breadth being consider- 

 ably greater than its length beyond narrowest part of vertex, especially in the 

 female. 



c^. Stouter, the hind femora shorter, not reaching the tips of the tegmina in 

 the female ; disk of pronotum, in female, hardly or not more than twice as 

 long as greatest breadtii ; head with a broad occipital fuscous band. 



texana Brun. 

 C.2 Slenderer, the hind femora longer, reaching the tips of the tegmina in the 

 female; disk of pronotum distinctly, generally much, more than twice as long 

 a- greatest breadth ; head with a narrow occipital band or none. 



hivittata Serv. 



b-. Fastigium of vertex more prominent and angulate, its greatest breadth 



being scarcely greater, even in Uie female, than its length beyond narrowest 



• part of vertex ; disk of pronotum considerably more than twice as long as 



greatest breadth intertexta sp. nov. 



