J 36 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



they were males and that the tibiae were brown rather than 

 black. The females of this species have the antennae and 

 legs marked with pale as in stygicus, although here the hind 

 tibiae are frequently brown as in the males. 



3. Strongylocoris robustus Uhler 



In this species the size and form are about as in corres- 

 ponding sexes of stygicus, but the polished convex face will 

 at once distinguish it. Here the dextral male clasper has 

 the median angle obtuse, not forming a tooth, and the upper 

 apical tooth of the fan-shaped apex greatly developed, the 

 balance of the fan-shaped apex being represented by about 

 two small teeth situated about midway between the median 

 angle and the apex. My specimens are from Denver and 

 Boulder, Colo., and in the collection of the California 

 Academy of Sciences are specimens from Colestin, Oregon, 

 McCloud, Siskiyou Co., and El Cajon and San Diego, in 

 San Diego Co., California. 



4. Strongylocoris croceipes Uhler 



This species is very distinct by its hairy upper surface 

 and orange colored legs. I have seen it only from San Diego 

 Co., California, and American Fork, Utah. 



Front flattened, minutely rugulose-punctate. 1 



Front convex, polished. 2 



1. Segment II of female antennae a fifth longer than width of head 



across the eyes; dextral male clasper with median angle pro- 

 duced in a long tooth, thus forming a semicircle with the in- 

 curved angle of the fan-shaped apex. stygicus Say. 

 Segment II of female antennae not longer than width of head 

 across the eyes; dextral male clasper with median angle obtuse 

 or produced in a short tooth thus forming a shorter arc with 

 the fan-shaped apex; the latter quadrifid, usually forming four 

 acute teeth, the dorsal much the longer. atratus Uhler. 



2. Legs entirely orange; surface clothed with sparse long white sub- 



erect hair; base of vertex strongly carinate. croceipes Uhler. 



Femora, at least, black; surface nude, without long pale pubes- 

 cence; base of vertex slenderly carinate. robustus Uhler 



