8g CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



nearly vertical ; when viewed from above nearly round or more 

 or less flattened within. Antennae pubescent, inserted near or 

 somewhat below the lower angle of the eyes; linear; basal joint 

 thickest, the apical becoming setaceous; the basal joint with 

 two or three longer stiff bristles or setae within toward its apex. 

 Pronotum trapezoidal, rather flat, usually transverse, but some- 

 times nearly or quite as long as broad, its converging sides 

 nearly rectilinear and its base feebly arcuated or straight 

 across the scutellum; callosities prominent, usually distant but 

 often connected by an elevated area anteriorly that does not 

 reach their hind margin. Scutellum nearly flat or moderately 

 elevated, its basal lobe often more or less exposed. Elytra 

 normally rather long, considerably surpassing the abdomen. 

 Membrane biareolate. Legs rather long, the hind femora mod- 

 erately incrassate; tibiae armed with a few weak spines. Ros- 

 trum normally attaining the apex of the intermediate coxae, 

 becoming black at apex. Oviduct of female short, beginning 

 behind the middle of the venter. Upper surface usually clothed 

 with a fine pubescence or with longer and stiffer hairs, or 

 with both. 



Our species of this large and difficult genus may conveni- 

 ently be grouped in three series : 



Group I (flavosparsiis group). Small, moderately elongated 

 green species with the base of the vertex sharply carinate, 

 the pronotum short, transverse, and the legs compara- 

 tively short. Some of the species are clothed with coarse, 

 often flattened, deciduous black hairs. Here belong : 

 insignis, n. sp. ; tibialis, n. sp. ; ferox, n. sp. ; viridicatus 

 Uhl. ; coagulatus Uhl. ; Havosparsus Sahlbg. ; chlorionis 

 Say ; fraternus, n. sp. ; uniformis, n. sp. ; translucens 

 Tuck. ; viridis, n. sp. ; senectus, n. sp. ; nigrinasi, n. sp. 



Group II (ovatus group). Medium sized, oval, pale colored 

 species having much the form of a Lygus with the aspect 

 of an Oncotylus. These have the base of the vertex ob- 

 tusely carinate, the pronotum transverse and the legs com- 

 paratively short. Here belong ovatus, n. sp., and catulus, 

 n. sp. 



