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



not at apex. Pale examples may become a clear light fulvous 

 on the pale areas. In dark examples the elytra may be en- 

 tirely black excepting a touch of pale at base and apex of 

 the cuneus and on the membrane at apex of the areole. In 

 fresh specimens the body is clothed with a pale pubescence. 

 The Niles Canyon specimens have the pale markings more 

 extended than in those from Contra Costa Co. At Portland, 

 Oreg., and Seattle, Wash., Mr. Giffard took a series that 

 show the same variation in color but differ in having the 

 tibiae more or less obscured, sometimes entirely blackish. In 

 teneral examples the hind femora are pale enough to show 

 the black dotting characteristic of the genus. 



Holotype (No. 355), male, from Contra Costa Co., in col- 

 lection of the California Academy of Sciences. 



Allotype, female, from Contra Costa Co., in collection of 

 Mr. Giffard. 



Paratypes in both collections and in that of the author, 



164. Plagiognathus lineatus, new species 



Very near mundus but having the elytral costa a little arcuated in 

 both sexes and marked with a pale vitta within the costa and a more slen- 

 der line on the claval suture. Length 5 mm. 



All structural characters in this species seem to be identical with those 

 found in mundus, except that the costa is gently arcuated in the male as 

 well as in the female and widest a little before the middle, a character 

 that might come from the shortening of the elytra found in this species. 



Color blackish fuscous, clothed with a rather close pale pubescence. 

 Base of the vertex with a transverse pale vitta, which shows no tendency 

 to spread over the vertex in the specimens before me. Pronotum some- 

 times with a pale area before the callosities and a larger one on the disk 

 behind them. Elytra with a narrow pale vitta on the claval suture, con- 

 tinued on the commissure, and a wider one just within the costa, the latter 

 connecting with the pale on the cuneus. Membrane deeply infuscated with 

 the nervures pale and with a whitish spot against the apex of the cuneus, 

 covering much of the smaller areole. Coxse in great part and often the 

 base of the femora pale. Legs black with pale knees, in some examples 

 with the tibiae more or less distinctly pale and marked with black dots. 



Described from five male and two female examples taken 

 by Mr. Giffard at Portland and Seattle, July 3-7, 1917. The 

 females are slightly immature indicating that the season was 

 still early for this species. 



Holotype (No, 356), male, from Portland, in collection of 

 the California Academy of Sciences. 



Allotype and paratypes in collection of Mr. Giffard. 



