80 BULLETIN m, UNITED STATES NATIONAL MUSEUM. 



Le[/6- rather tsoinewhat slender. Femora moderately and rather 

 sparsely punctate; anterior tibial spurs rather feebly developed. 

 First joint of the anterior tarsi very feebly thickened at tip beneath. 

 Otherwise as in omissa. 



Male. — More or less oblong-ovate and somewhat slender. Abdomen 

 feebly oblique. P^irst joint of the anterior tarsi with a minute and 

 l^ointed tuft of modified spinules on tip beneath. 



Female. — Ovate, anterior spur of the anterior tibia3 not strongly 

 differentiated and not elongate as usual. 



Measurements. — Males: Length, 15-17 nnn. ; width, 6-G.5 mm. 

 Females: Length, 16-18 mm.; width, 7-8 mm. 



Genital characters. — Male. — Edeagophore as in omissa. 



Sternite parabolic in outline, slightly transverse. Each lobe sub- 

 triangular; external border quite evenly arcuate, with apex introrsely 

 placed and narrowly rounded ; internal border straight ; surface 

 slightly convex, glabrous and not densely punctate in apical half, 

 setse moderate in length and not dense. Membrane sparsely setose at 

 bottom of the sinus, the latter rounded and subparabolic. 



Female. — Genital segment quadrate; dorsal surface plane and 

 setose. 



Valvula. — Dorsal plate oblong, moderately wide and explanate 

 apically; surface nearly plane, very glabrous, sparsely and finely 

 punctate, setse moderate, longer towards apex; borders subparallel, 

 the external sinuous at basal third, thence feebly arcuate to and con- 

 tinuously so with the broadly and strongly rounded apical margin, 

 which is minutely sinuate at internal fourth; internal margin sinuous. 

 Apical external lobe inferior, the internal small, both Avith a few long 

 flying hairs. 



Ajypendage small mammilliform, not visible from above, with few 

 long hairs on tip. Fossa moderate and frin^^ed with long soft seta\ 



Basal prominenceH not visible laterally. 



Superior pudendal membrane longitudinally rugulose and reaching 

 to the base of the internal apical lobe. 



Veyitrolateral surface strongly convex at the basal third, thence to 

 apex broadly concave; submarginal groove broad and well marked 

 basally, thence passing into the general concavity ; surface in apical 

 two-thirds sparsely and finely punctate and setose. Internal mar- 

 gins of the valves contiguous at basal sixth and subcontiguous in 

 apical two-sixths; fissure broadly fusiform and closed at the basal 

 half by the inferior pudendal membrane, the latter rugulose. 



Habitat. — Lower California (Sierra San Lazaro). 



Number of specimens studied, 20. 



Types in the collection California Academy of Sciences; co-sexi- 

 types in my own. 



Type-locality. — Sierra San Lazaro, Lower California. 



