ORTHOPTERA— ACRIDIDAE— PEZOTETTIX MARSHALLII. 889 



slightly silicate; frontal costa flat, punctured, scarcely sulcate. Pronotnm 

 compressed on the sides, which are parallel; lateral carina? somewhat dis- 

 tinct though not sharp; tranverse impressions distinct; the two anterior 

 distant from the posterior, which is situated behind the middle; posterior 

 margin obtusely rounded; the posterior lateral margins ascending without 

 any inward curve or angle. The thorax appears rather longer than usual, 

 especially the prothorax ; the middle coxse falling behind the lower corner 

 of the pronotnm a little farther than usual. Elytra very short, extending 

 only upon the second segment, ovate, not quite meeting on the back. 

 The spines or processes of the last abdominal segment long and slender, 

 extending upon the super-anal plate more than half its length; a small 

 tubercle at the base of each; cerci very broad, somewhat nan-owed at the 

 apex, but not suddenly decreasing in width; sub-anal plate terminating in a 

 rounded tooth-like point. Anterior femora somewhat strongly arcuate. 



Color (after immersion in alcohol). — A yellowish-brown, except as 

 follows: — antennas pale; eyes brown; a shining, dark-brown, quadrate spot 

 on the side of the pronotnm, extending from the anterior submarginal 

 indentation to the posterior sulcus; a spot of similar color extending from 

 the middle of the posterior lateral margin of the pronotum to the insei'tion 

 of the middle legs; elytra brown, unspotted; a dark-brown stripe on the 

 side of each abdominal segment except the last; spines of the posterior 

 tibia? black. 



Length, 0.80 inch; elytra, 0.14 inch. 



Although found in this collection, it is marked as having been obtained 

 in Oregon by J. Haldeman. 



PEZOTETTIX MARSHALLII, sp. nov. 

 Plate XLV, Fig. 4. 



Male and female. — Vertex narrow between the eyes, which are more 

 than usually approximate, expanding somewhat in front, slightly defiexed, 

 distinctly sulcate; frontal costa flat slightly depressed at the ocellus. The 

 immediate foveola? in which the antenna? are inserted have a more than 

 usually prominent margin. Pronotum flattened and compressed on the 

 sides, which are straight in both sexes, parallel in the male and slightly 



