Vol. VI] VAN DUZEE— SPECIES OF ORTHOTYLUS 115 



upon the outer cheeks. Antennae dark greenish-piceous, the 

 basal joint more green. Sides of the pectus and abdomen with 

 a narrow blackish vitta which is wanting in the female. Pro- 

 notum marked with a broad black vitta on either side, usually 

 connected with the black callosities. Scutellum black, the an- 

 terior lobe sometimes marked with fuscous, the posterior with 

 a linear median pale vitta. Elytra blackish-fuscous, the broad 

 costa and a slender line along the commissure and suture of the 

 clavus pale, the cuneus entirely pale. Membrane deeply infus- 

 cated, the nervure pale except at base. Legs greenish, the 

 tibise more dusky, the apex of the tarsi black. 



Described from numerous examples taken from willows 

 about Fallen Leaf Lake, near Lake Tahoe, Calif., in July, 1915. 

 Best distinguished from molliculus by the narrower and more 

 rounded anterior margin of the pronotum, the linear pale vitta 

 on the scutellum, the narrower blackish lateral vitta beneath, 

 the want of a fuscous ray in the pale costal area, and the dark 

 olive-green antennae which become blackish at times. Male 

 genital hooks much more developed and very characteristic. 



Type, male, and allotype in collection of University of Cali- 

 fornia. Paratypes in Museum of California Academy of Sci- 

 ences (Nos. 320, 321), collection of the University of Califor- 

 nia and in author's collection. 



23. Orthotylus angulatus Uhler. 



Smaller and more slender than dorsalis; dark fuscous- 

 brown, base of the pronotum sometimes paler, the base of the 

 corium and the cuneus whitish. Length 4mm. to tip of mem- 

 brane. 



Head short. Vertex short, with an impressed line before 

 the obtuse basal carina; in the female this line connects with 

 two fovae which are nearly obsolete in the male. Clypeus large, 

 prominent. Eyes large, about two-thirds as wide as the vertex ; 

 viewed from the side oval, nearly reaching the line of the gula. 

 Antennas stout and rather long, the basal joint longer than the 

 head viewed from above; third and fourth slender, together 

 about as long as the second. Pronotum rather short, the sides 

 nearly rectilinear, the anterior angles rounded; callosities large, 

 approximate, little elevated. Anterior lobe of the scutellum 



