440 CALIFORNIA ACADEMY OF SCIENCES. 



Trochanters conspicuously yellow. Legs black, the ba- 

 sal half of the middle and hind tibiae yellow. Length, 

 .36— .64 inch; 9—16 mm. 



Male. — Last joint of maxillary palpus transverse, nar- 

 rowly oval, inner angle acute, the under side concave. 

 Fifth ventral segment triangularly impressed at apex, 

 sixth deeply and broadly emarginate. 



Female. — Last joint of palpus C3dindrical, slightly 

 broader at middle, apex truncate. Last ventral segment 

 with a small triangular notch. 



This species resembles insulata Lee, but the el3^tra 

 have not the apical yellow spot. The legs, including the 

 trochanters, are entirely black in insulata. The elytral 

 coloration resembles the figure of divirgata var. (Biol., 

 iv, pt. ii, pi. 21, fig. 17), but the color of the trochanters 

 is not noticed in the descriptions, and if conspicuously 

 pale, as in trochanter icns, would certainly have been. 



Sierra El Chinche 2,000 feet. 



Tetraonyx dubiosus n. sp. 



Rufous, clothed with very fine short pubescence, opaque 

 resembling T. frontalis in form and color. Head uni- 

 colored closel}" punctate. Thorax more than twice as 

 wide as long, disc uneven, a vague depression of middle 

 near the base and within each hind angle, surface closely 

 punctate. Scutellum rufous. Elytra densely punctate, 

 extremely finely bicostate. Body beneath rufescent, more 

 shining, less punctate and pubescent than above. Meta- 

 sternum piceous along the posterior border, met-epister- 

 num tipped with black. Ventral segments with a trans- 

 versely oval spot on each side. Legs rufous, knees, tips 

 of tibiae and tarsi black. Length, ,52 inch; 13 mm. 



This species resembles frontalis, but the head is en- 

 tirely red and the underside also rufous. It must be re- 



