MORGAN HEBARD 281 



Type. — cf ; Colfax, Placer County, California. Elevation, 

 2450 feet. August 28, 1910. (Rehn and Hebard.) [Hebard 

 Collection, Tj-pe no. 503.] 



Size small, form slender. Head much as in vmrginatus, but with area of 

 fastigio-facial angle distinctly less produced, the angle itself more broadly 

 rounded. Frontal costa shallowly concave. Eye large, about two and one- 

 half times as long as infra-ocular sulcus. Pronotum elongate, disk of equal 

 width, with a slender but well defined and percurrent medio-longitudinal carina, 

 lateral carinae very weakly defined, caudal margin nearly transverse, very 

 broadly obtuse-angulate produced. Prosternal spine as in marginatus; small, 

 bluntly elongate subconical. Tegmina slightly shorter than pronotum, 

 broadly oval with immediate apex acute and sharply rounded."" Furcula 

 represented by a pair of minute, slender teeth, each about twice as long as mde, 

 with apex bluntly rounded. Supra-anal plate simple, moderately elongate 

 trigonal, the lateral margins showing very feeble convexity, surface with a 

 moderately broad, proximal, medio-longitudinal sulcation. Cerci elongate, 

 weakh' curving inward, about three and one-half times as long as proximal 

 width, tapering evenly in proximal two- fifths, median fifth slender with margins 

 almost i:)arallel, distal two-fifths enlarged, but not .swollen or truncate as in 

 marginatus, enlargement due to broad convexity of dorsal margin, with blunt 

 apex at ventral margin ; the ventral margin is almost straight, very feebly con- 

 cave throughout, the dorsal margin more strongly concave to distal portion, 

 where it is convex. Subgenital plate as in marginatiis; median section of 

 slightly greater depth laterad than mesad, with a small but distinct tubercle 

 mesad, at the free margin. Limbs as in marginatus. 



Allotype. — 9 ; same data as type. [Hebard Collection.] 



Size larger, form heavier than in male. The heavier form and less produced 

 fastigio-facial angle as strikingly in contrast with this sex of marginatus as 

 between males of the.se species. Fastigium of vertex and frontal costa decid- 

 edly broader and less sulcate than in male. Eye about two and one-quarter 

 times as long as infra-ocular sulcus. Pronotum with medio-longitudinal 

 carina not as sharp as in male. Ovipositor and limbs as in marginatus. 



Measurements {in millimeters) of extremes only 



Caudal 



width of Length of 



& 



Length of Length of pronotal Length of Width of caudal 



body pronotum disk tegmen tegmen fenmr 



Type 14.5 3.1 2 3 2 S.2 



Paratypcs (28) 14.8-16.8 3-3.9 2-2.1 3-3.9 1.9-2.2 7 . 9-9 . 8 

 9 



Allotype 21 4 3 4.2 2.8 11 



Paraty pes (19) 18-22 3.6-4.8 2.6-2.9 3.3-4.9 2.1-3 9-11.3 



" In the majority of the series attingent, varying from subattingent to feebly 

 overlapping. 



TR.^X.S. AM. ENT. SOC, XLV. 



