Vol. Xxix] ENTOMOLOGICAL NEWS 343 



A New Genus and Two New Species of Tettigids 



(Orthoptera), with a Note on Nomotettix 



borealis Walker. 



By J. L. Hancock, Chicago, Illinois. 



(Plate XX.) 



Two new tettigids from the southern United States herewith 

 described, are noteworthy as representing a new genus closely 

 allied to Neotettix Hancock. Rehn and Hebard recently 

 recorded^ under the genus Neotettix another species called 

 proavns, from Georgia and North Carolina, which properly 

 belongs to this new genus ; so that three species, one of which 

 might possibly be a race, are known within our borders. Of 

 these three species, niilUsinus, from Brownsville, Texas, is 

 selected because of its clearly defined characters, as the type 

 of the genus, to which I have given the name Cavotettix. All 

 three members of the genus, namely: Cavotettix ymUisinns sp. 

 nov., Cavotettix proavns Rehn and Hebard, and Cavotettix 

 apterus sp. nov., are easily separated from members of the 

 genus Neotettix. 



CAVOTETTIX genus nov. 



Somewhat resembling in general aspect the genus Neotettix 

 Hancock in the small size, the abbreviated pronotum, and the 

 wide and nonproduced vertex as viewed from above, but 

 diflfering as follows : the body apterous or subapterous ; the 

 median carina of the vertex more compressed ; the somewhat 

 wider scutellate frontal costa ; in the tectate dorsum, with the 

 median carina of the pronotum compressed-cristate. This 

 genus is also differentiated by the broad scapular area at 

 the sides of the pronotum ; the lateral lobes of the pronotum 

 bearing but one deep and angular excavate sinus, the superior 

 tegminal sinus being vestigial or entirely obliterated ; the teg- 

 mina either absent, or minute, vestigial ; the wings absent or 

 rudimentary, normally covered from view ; the first joint of 

 the hind tarsi nearly twice the length of the second and third 

 combined. 



^ Proc. Acad. Nat. Sciences, pp. 139, 140, 1916, plate XII, Figs. 1-2. 



