724 GEOLOGICAL SURVEY OF THE TERRITOEIES. 



Aeridnim emarrjinatum, Ulil. 



Male. — Taken at Omaha, August 1. Face greenish yellow ; a row of 

 distinct black punctures down each margin of the frontal costa, and a 

 row across the upper part of the clypeus. Palpi and anteunte bright 

 yellow. The dorsal stripe on the head and pronotura bright yellow, ex- 

 tending forward over the vertex and down the front nearly to the cen- 

 tral ocellus ; its extension on the suture of the elytra yellowish white ; 

 it is bordered each side by a broad, dark greenish brown stripe, which 

 fades on the sides into reddish brown on the elytra, and paler greenish 

 brown on the pronotum, these latter colors occupying the entire sides. 

 The pronotum has scattered over it golden dotes. Wings transparent, 

 pale greenish yellow at base, the front margin and apical half tinged 

 with pale reddish brown ; nerves and nervules corresponding in color 

 with the parts. Abdomen with a dark stripe along the dorsal carina, 

 sides purplish green, each segment having a ring of black dots on the 

 posterior margin. The cerci very broad, somewhat notched at the apex, 

 pale purplish ; sub-anal plate with a broad, square notch at the apex. 

 The elytra have no spots whatever on them. Anterior and middle legs 

 greenish externally, striped internally with black. Posterior femora 

 pale dull green or olive externally, with a row of black dots along each 

 margin of the disk ; internal face fuliginous or i)urplish ; a row of black 

 dots along the upper margin. Posterior tibiaB, with the posterior and 

 inner face black, exterior face greeuivsh purple, becoming black above; 

 spines white at base, black at tips. Pulvilli remarkably large, oblong- 

 ovate. 



Dimensions. — Length, 1.30 inches ; elytra, 1.22 inches; pronotum, .32 

 inch ; posterior femora, .75 inch; posterior tibial, .73 inch. 



This and the two preceding species appear to reside chiefly on high, 

 rank weeds, not being, properly ground-locusts; though in this respect 

 C. hivittatus varies more than the other two, as it appears to adapt 

 itself to almost any situation. 



Opomala hivittataj Serv. 



I met with this species at Lincoln, Nebraska, also at Manhattan, in 

 Kansas. 



Female. — Head and thorax rufous, except the stripes, which are red- 

 dish brown. Elytra semi-transparent, light brown or brownish, slightly 

 tinged with rufous on the upper half, near the base ; a short, narrow, 

 white stripe near the base, along the lower (front) margin. Wings pel- 

 lucid, with a faint greenish-yellow tinge ; nerves and nervules mostly 

 dark. Four anterior legs rufous ; i)Osterior femora rufous above and on 

 the disk, yellow beneath ; posterior tibiiie yellow. Venter and pectus 

 yellowish. 



Dimensions. — Length, 1.5 inches; elytra, 1.13 inches; pronotum, .25 

 inch; i)osterior femora, .90 inch; posterior tibia3, 1.1 inches. August 3. 



Ommatolampis viridis, Thos. 

 Syu. Caloptenus viridis, Thos. 



Lincoln, N'ebraslca, August 5. — Among the orthoptera met with at this ■ 

 •place, I noticed this species quite abundant in the luxuriant green grass. 

 I am now tolerably well satisfied that it belongs to Ommatolampis of 

 Burmeister, and have, therefore, placed it in that genus, and herewith 

 give a full description from living specimens, the males and females 

 exhibiting scarcely any differences in size or color. 



The vertex, on close examination, appears to be somewhat hexagonal, 



