MORGAN HEBARD 189 



longitudinal dorsal abdominal stripe, longer cerci which are 

 decidedly narrower proximad and broader distad, somewhat 

 differently proportioned penis and differently shaped subgenital 

 plate. 



Females are smaller than that sex of montanus, differing quite 

 as decidedly as the opposite sex in proportions of head and pro- 

 notum, narrower fastigium and frontal costa and coloration. 



Type. — $ ; Harkness Peak, Plumas County, California. Ele- 

 vation 8000 to 9200 feet. August 20, 1922. (M. Hebard). 

 [Hebard Collection, Type No. 1301]. 



Size rather small, form rather slender, averaging smaller and less robust 

 than montanus. Head and pronotum normal, not enlarged out of pro- 

 portion to size of body. Interocular space very slightly less than one-half 

 dorsal width of the large but not unusually protruding eyes. Fastigium 

 weakly impressed, transverse but decidedly smaller and slightly more pro- 

 duced than in montanus. Frontal costa different as noted above. Pro- 

 notum with dorsum curving into lateral lobes with definition between these 

 parts little indicated; medio-longitudinal carina very feeble cephalad, 

 subobsolete mesad, distinct across metazona; transverse sulci distinct but 

 decided only on lateral lobes ; caudal margin of disk transverse, showing the 

 faintest trace of bilobation; lateral lobes distinctly more elongate than in 

 montanus, depth equal to length of prozona and mesozona. Prosternal 

 spine moderately slender, tapering to the rounded apex. Tegmina repre- 

 sented by small narrowly oval pads which reach the caudal margin of the 

 large tympana. Furcula represented by very slight projection of the 

 weak thickenings of the tergite. Supra-anal plate shield-shaped, meso- 

 proximal and lateral concavity pronounced, a small but prominent node 

 present laterad opposite cereal bases. Cerci elongate, gradually narrowing 

 to distal fourth, there moderately falcate and also curved moderately 

 inward, apex very slightly widened with dorso-distal margin curving down 

 to the sharply acute-angulate ventro-distal angle. Penis similar to that of 

 montanus but exposed portions narrower and longer and dorso-lateral 

 margins of dorsal lobes less flaring. Subgenital plate shorter than in that 

 species, deeper lateral but only slightly more produced mesad and there 

 terminated in a very weak, low, blunt tubercle. 



Allotype. — $ ; same data as type. [Hebard Collection]. 



Larger and decidedly more robust than male, differing from females of 

 montanus as noted above. Agrees with male except as follows. Pronotal 

 sulci even weaker dorsad. Caudal margin of pronotal disk feebly sub- 

 bilobate. Prosternal spine shorter, stouter and blunter. Ovipositor normal. 



General coloration of male dull dark brown. Pronotal lateral lobes some- 

 times slightly (rarely distinctly) paler, buffy brown ventrad below two large 



TRANS. AM. ENT. SOC., LXH. 



