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



Woodlands, one pair taken in San Francisco, June 13, 1917, 

 and a long series from Muir Woods, July 15, 1917. In this 

 species the antennas have nearly the fonn found in gilvipcs 

 but are colored about as in ambulans. It is possible these 

 three will prove to be subspecies of a single form. 



Holotype (No. 346), male, from San Mateo Co., in collec- 

 tion of the California Academy of Sciences. 



Allotype (No. 347), female, from San Mateo Co., in collec- 

 tion of the California Academy of Sciences. 



Paratypes in collection of the California Academy of 

 Sciences, in that of Mr. Giffard and in that of the author. 



151. Lahopidea nigripcs Rent. Fallen Leaf Lake, August 

 21, 1916; Summit, August 24, 1916. 



152. Parthenicus psalliodcs Rent. Los Altos, July 26, 1916. 



153. Parthenicus ruber, new species 



Aspect of a Psallus, but separable by the flattened hind femora and the 

 presence of parallel arolia ; testaceous irrorate with sanguineus, giving the 

 insect a reddish appearance ; membrane maculated. Length 3^^ mm. 



Head produced below the eyes for a distance equal to the length of the 

 eye. In both sexes the eyes are small and the vertex is broad, about twice 

 the width of the eye when viewed from above ; first antennal segment but 

 little surpassing the clypeus in the female, exceeding the clypeus by about 

 one-half its length in the male ; second segment as long as from the tip 

 of the head to the apex of the scutellum, a little shorter in the female ; 

 third hardly one-half the second ; fourth about one-half the third. Eyes 

 distinctly separated from the anterior angles of the pronotum. Sides of 

 the pronotum rectinlinear. Abdomen reaching to just beyond the base 

 of the cuneus in the male, to its apex in the female, the costa nearly 

 straight in the male, gently arcuated in the female. Rostrum attaining 

 the middle of the venter. 



Color testaceous, more or less tinged with red in most individuals ; 

 irrorated with sanguineous or often quite uniformly dull sanguineous, with 

 the sides of the pronotum dusky. Membrane enfumed, the nervure pale, 

 varied with sanguineous ; margin with a whitish-hyaline spot next the 

 apex of the cuneus and another a little farther out, the latter often obscure 

 or wanting. Antennae pale with a sanguineous line around the first seg- 

 ment near its apex and sometimes a reddish tinge near the base. Legs pale, 

 the anterior and intermediate femora obscurely dotted with sanguineous, 

 the posterior more or less infuscated and heavily dotted ; all the tibias dot- 

 ted with red or castaneous. Beneath mostly sanguineous with the coxae 

 pale. Male genital styles long, terete, lying parallel to and near the ventral 

 wall of the pygofer. 



Described from numerous individuals taken by Mr. Giffard 

 in Placer Co., August 20, 1916, and one male taken by Dr. 

 J. C. Bradley at Sisson, Calif., August 19, 1908; two males 

 and one female from Mt. Tamalpais, August 16, 1916, and 



