78 NEW NORTH AMERICAN ACRIDID.E BRUNER. 



upon the occiput; lower lateral edges rather more rounded than in 

 the allied forms. Tegmiua moderately broad, and very closely reticu- 

 lated — so much so as to give the unmagnified surface a sort of granu- 

 lar appearance — most of the cross- veins as heavy as the veins, extend- 

 ing a little beyond the tip of the body in both sexes. Posterior femora 

 ample, with heavy carina?, considerably longer than the tibia?, reaching 

 the tip of the abdomen in both sexes. 



General color dirty grayish brown, incliniug to ferruginous in some 

 specimens, lightest beneath. The tegmiua mottled with small quad- 

 rate fuscous spots, which are gathered into groups forming two dim 

 bauds, the one with its outer edge defining the basal third, and the 

 (second across the middle of the wing ; there are also a few scattered 

 spots on the apical third; all the nerves and veius of the tegmiua 

 are brownish testaceous, darkest near the base, the wing itself being 

 dull dirty yellow becoming more or less transparent apically. Wings 

 light greenish yellow on the basal half, usually without any well-defined 

 fuliginous band, but iu some specimens represented by a very faint 

 cloudiness in some of the cells just beyond the middle of the wing; 

 veius and cross- veius of the apical half of the wing black, which on the 

 middle of the humeral field reach nearly to the base. Posterior femora 

 with the basal half of the inner face and lower sulcus black, the former 

 followed by a narrow yellow then a black baud; externally crossed by 

 two faint dusky oblique bands; posterior tibia? glaucous with a rather 

 wide-dull yellow annulus just below the knee; spines black. Antenna? 

 dark, obscurely annulate. 



Length of body, $ , 17 mm , 9 , 21 IU "' ; of antenna-, $ , 7 mm , 9 , 6.5" ,UJ ; 

 of prouotum, S , 3.6 n,m , 9 , 4,5 mm ; of tegmina, $ , 16.5 n,m , 9 , 19 n,m ; of 

 hind femora, <5 , 10 ,um , 9, 12 mm j of hind tibia?, $ , 8.35 ram , 9 , 9.75 mni . 



Hab. — On high stony hill-tops to the southwest of San Francisco, 

 Cal., late iu October (Koebele, Bruuer). 



Thrincus (?) avidus sp. uov. [PI. I, Figs. 2, 3.] 



Considerably larger than Thrincus califomicus Thos., with the teg- 

 mina and wings much longer than these. Cinereo-testaceous, profusely 

 mottled with dull rust brown and black. 



Head proportionately broader and longer than in T. califomicus, and 

 less sunken into the front edge of the pronotum than in that species. 

 Vertex between the eyes a very little broader ( S ), or nearly twice as 

 broad ( 9 ) as the diameter of the basal antennal joint, depressed, 

 roundly sulcate, rather shallowly in the female but deeper in the male, 

 the lateral carina? parallel, reaching troin near the posterior edge of 

 the eyes deflecting and meeting iu front in a right angle; frontal costa 

 rather narrow above, expanding below and fading just before reaching 

 the clypeus, gently sulcate throughout iu both sexes. Face, sides of 

 head and thorax coarsely pitted and wrinkled, giving the surface a very 

 rough appearance. Prouotutn short and broad, the anterior lobe with 



