V0 1889."'] PROCEEDINGS OF THE NATIONAL MUSEUM. 65 



on the pronoturn nearly the' entire sides of the anterior lobes, also the 

 front half of the disk along both sides of the niediau carina; on the 

 meso- and metathorax the entire pleurae except two short narrow an- 

 teriorly directed oblique blotches of the light color. The tegrainahave 

 the dorsal or posterior half free from marks, save at the immediate base, 

 where they have the narrow converging fuscous dashes; on the lower 

 half are three rather large black blotches, the first with its outer margin 

 defining the basal fourth, the second about the middle, and the third just 

 beyond; apex and base also containing a few small scattered quadrate 

 spots; apical third more or less hyaline, the principal veins black. 

 Wings hyaline, with the faintest possible yellowish tinge at the immedi- 

 ate base ; veins on the outer third and along the costal margin more or 

 less dusky. Antennae piceous, becoming greenish white, in some speci- 

 mens obscurely annulate. Posterior femora with three deep black 

 patches above, which continue over to the inner face ; lower outer carina 

 furnished with a few dusky dots, outer face somewhat clouded. There 

 is also an obscure clouded or marbled appearauce noticeable throughout 

 the greater portion of the greenish upper surface. Posterior tibia? glau- 

 cous, the apex and a narrow band just beyond the base infuscated, the 

 spines black; anterior and middle legs quite regularly annulate with 

 dark brown or black. Sides of abdomen marked with a row of dusky 

 dots, which are plainest in the male. 



Length of body, $ , 18 mm , 9 , 23""" ; of antenna? $ , 9 mm , 9 , 8""" ; of 

 pronotum, $ , 3.62""", 9 , 4.75"""; of tegmiua, S , 18""", 9 , 21 ; of posterior 

 femora, $ , ll mm , 9 , 12.3 ; of tibiae, $ , 9 1 "'", 9 , 10.85 mm . 



Hab. — Yellowstone Valley, Montana, between Livingston and Gar- 

 diner ; also at Glendive, below the mouth of Powder Eiver (L. Brunei). 



This interesting species has been observed to feed upon the foliage of 

 the " Sweet Sage" (Eurotia lanata) to the exclusion of all other plants; 

 and although so far as at present known, is local in its distribution, yet 

 not at all rare. Why it should be confined to the valley of the Yellow- 

 stone is not known, for certainly the same plant occurs at other localities 

 in far greater quantities. In Colorado, on the Laramie River, there is 

 another locust found with a similar habit, which also very singularly 

 possesses almost identical markings, although belonging to a different 

 genus. This latter species is also new and described here for the first 

 time. 



The preparatory stages of pulchetta, like the mature insect, are so char- 

 acteristically marked and so closely resemble the perfect specimens that 

 there can be no mistaking their identity. These also feed upon the 

 same plant. 



Conozoa texana sp. nov. 



About the size of G. sulcifrons and G. albolineata, to the latter of 

 which it is most nearly related, but differing from it in general color- 

 ation, in the shorter and more robust hind femora, in the shorter an- 

 terior lobes of the pronotum, and in the larger more globular eyes. 

 Proc. N. M. 89 5 



