268 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



amples of this species in my collection in having the sinistral 

 genital hooks of the male with but a short spine or tubercle 

 at its outer angle in place of the long horn found in my east- 

 ern examples but I do not feel like separating it on this 

 character alone as it is a character subject to much variation 

 in all our species, even among specimens from the same 

 locality. 



123. Deraeocoris fraternus Van D. Donner Lake, August 

 24, 1916, one example. 



124. Largidea grossa Van D. Placer Co., August 20, 1916, 

 one example. 



125. D icy phus calif ornicus (Stal). Redwood Canyon, July 

 2, 1916; Crystal Springs, San Mateo Co., June 25, 1916; Los 

 Altos, July 26, 1916; Santa Cruz Co., June 10, 1917. Com- 

 mon everywhere on tarweed. 



126. Dicyphus rufescens, new species 



Allied to californictis but more reddish in color, with the basal margin 

 of the pronotum less deeply excavated and the elytra marked with a sub- 

 costal brown line and two black spots at apex. Length 4-5 mm. 



Head as in californicus. Pronotum with the humeri less prominent 

 and the hind margin but feebly excavated before the scutellum. Elytra 

 about as in the allied species. Antennae a little longer ; second segment 

 as long as from the tip of the head to the incised line on the scutellum ; 

 third considerably longer than the second ; fourth short, one-third longer 

 than the first. Rostrum reaching to between the intermediate coxae. 



Color sanguineous or black. Head and pronotum black, polished ; scu- 

 tellum and abdomen sanguineous to piceous. Elytra yellowish-subhyaline, 

 in certain lights showing a deep purple reflection from the wings beneath ; 

 costal nervure slenderly brown and against it a slender brown line, widened 

 to its apex and reaching to opposite the tip of the clavus ; apex of the 

 corium broadly black, the cuneus more opaque, yellowish white with the 

 broad apex black ; a sanguineous line follows the claval suture and is 

 deflexed around the apex of the corium. Membrane slightly enfumed with 

 a deeper shade beyond the areola, the nervures fuscous. Coxae and legs yel- 

 lowish, the femora more or less castaneous, and the hind tibiae nearly 

 black. Antennae pale yellowish, the first segment and base of the second 

 deep black. Rostrum pale, becoming black at base and apex. 



Described from two females taken by Mr. Giffard at Wa- 

 wona, June 17, 1916, and one female taken by me at Alpine, 

 San Diego Co., June 7, 1913. This latter individual has the 

 pronotum sanguineous with the collum pale and the abdomen 

 sanguineous becoming piceous near the ovipositor. 



Holotype (No. 339), female, from Wawona, in collection 

 of the California Academy of Sciences. 



