Vol. VI] VAN DUZEE—SPECIES OF ORTHOTYLUS 95 



Color pale bluish-green with a whitish aspect when de- 

 nuded. Scutellum, head, lower surface and legs, and some- 

 times the callosities, yellowish. Membrane faintly fuliginous, 

 the nervures paler. Antennae infuscated nearly to the base of 

 the second joint, the basal pale. Tibial bristles and apex of the 

 tarsi black. 



Described from numerous specimens taken in San Diego 

 County, Calif., as follows: Alpine, March to April; Balboa 

 Park, San Diego, April; El Cajon Valley, May first. This in- 

 sect has much the aspect of tibialis and quite similar genital 

 characters, but the females are less oval and the antennae are 

 pale instead of black. This and the three following species 

 have the vertex broader with much smaller and less prominent 

 eyes. 



Type, male, and allotype in author's collection. Paratypes 

 in Museum of California Academy of Sciences (305, 306), col- 

 lection of the University of California and in author's collec- 

 tion. 



4. Orthotylus viridicatus Uhler. 



Form of coagulatus; clothed above with coarse black decid- 

 uous hairs; membrane blackish with the nervures at the apex 

 of the areoles conspicuously white. Length Ay^mm. 



Head smaller than in the allied species with the eyes large 

 and prominent, especially m the males. Vertex flat, distinctly, 

 angularly impressed before the prominent basal carina; front 

 but slightly convex. Clypeus very prominent, its base dis- 

 tinctly below the line of the antennae. Eyes, viewed from the 

 side, much longer than broad, angled below, reaching over half- 

 way to the gula. Antennae short, the second joint scarcely 

 longer than the basal width of the pronotum. Pronotum short, 

 transverse; sides scarcely arcuated, the anterior angles well 

 rounded; callosities prominent, convex. Elytra rather short, 

 the abdomen reaching to about the middle of the cuneus in the 

 male, to beyond its tip in the female. 



Dextral hook of the male genitalia long protruding, terete, 

 its end rounded and not at all narrowed ; sinistral hook broad, 

 curved, parallel with the lower margin of the pygofers, its acute 

 apex curved inward. 



