V(II.. XI 



] PROCEEDINGS OF THE NATIONAL MUSEUM. Gl 



mina along the two principal veins, the front and back margins with 

 others joining these, thereby giving the wing the appearance of being 

 heavily and irregularly marked with dark olivaceous blotches. Pos- 

 terior femora with three oblique lines each of the olivaceous and pink- 

 ish yellow; posterior tibia?, with the under surface and anterior and 

 middle legs testaceous; the former with the base and middle somewhat 

 infuscated, giving them an obscure banded appearance ; spines without 

 dark tips. Wings with the basal fourth ( 9 ) or fifth (. $ ) tinged very 

 slightly with dull yellow, the apical fourth hyaline with the principal 

 veins and some of the cross veins black ; remaining portion of the wing 

 fuliginous, a rather broad shoot extending nearly to the base along the 

 costal margin. Antenna? ferruginous. 



•Length of body, $ , 19 mm , 9 , 27""" ; of antennae, $ . 11""", 9 , 12""" ; of 

 pronotum, $ , 3.40" 11 ", 9, 4.85"""; of tegmina, $ , 18 mm , 9,22.50 mm ; of 

 posterior femora, 6 , 10."")""", 9 , 13'"'" ; of tibia?, S , 10.5""", 9 , 13""". 



Hab. — Birch Creek, Idaho (Bruuer). 



A single pair taken in August, 1883, upon the small thorny plant 

 known as Grayia polggaloides. Other specimens might have been se- 

 cured had there not been a heavy frost the preceding night, thereby 

 causing most of the locusts to seek shelter for the time being. The 

 only time we could spare here*for collecting was early morning before 

 the heat of the day. 



This species differs considerably from the description and figures of 

 P. nevadenxis Thos., in its variegated color, the much shorter pronotum 

 which is rounded instead of truncate in front, and in the rounded an- 

 terior edges of the tegmina. 



Subfamily CEDIPODINiE. 

 Psoloessa Buddiana sp. uov. [PI. I, Fig. 6.] 



In size and general structure very similar to P. ferruginea Scudd., 

 but differing from that species in the coloration, which here is very 

 decided. 



Vertex rather deeply sulcate in the form of a new moon, without 

 indications of a median carina; the lateral carina? quite prominent; 

 frontal costa plain above, gently sulcate just below the ocellus; lateral 

 facial carina? arcuate, united at their upper and lower ends by cross 

 carina? with those of the frontal costa, forming elongate walled fields, 

 as it were, in the center of each of which is a lunate depression directly 

 opposite to the lower edge of the ocellus. Pronotum with its lateral 

 carina? arcuate, the median carina prominent throughout, straight. 

 Tegmina narrow, a little surpassing the tip of the abdomen. Posterior 

 femora a little stouter than in ferruginea, reaching just past the abdo- 

 men. 



Face, sides of pronotum, uuder side, and abdomen yellowish white ; 

 the former with a few brown dots along the costa and carina?. Upper 

 side of pronotum, occiput, and anterior half of tegmina testaceous, the 



