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



orous on the alternating bands. Front with a median line, widened at apex, 

 and about six arcs on either side pale ; disk of the clypeus and cheeks 

 more or less pale, the temples spotted with black. Knees, tibiae and tarsi 

 pale, the tibiae black within. 



Described from seven male and six female examples taken 

 by Mr. Giffard at Soda Springs, Placer Co., August 24, 

 1916. I place this tiny species in Acucephalus on account of 

 the broad head and oblong form, although the female wants 

 the depressed vertex usual in that genus. 



Holotype (No. 364), male, in collection of California 

 Academy of Sciences. 



Allotype, female, in collection of Mr. Giffard. 



Paratypes in both collections and in that of the author. 



242. Memnonia simplex, new species 



Female: Aspect of consobrina, larger and of an almost uniform pale 

 green. Male more whitish, vertex and pronotum bilineate with fuscous. 

 Length, male 4 mm., female 6 mm. 



Head longer than in consobrina, subacutely triangular ; median length 

 of the vertex twice that next the eye and one-fourth greater than the 

 basal width between the eyes ; surface closely ■ but obscurely rastrate- 

 punctate ; ocelli placed distinctly superiorly and rather distant from the 

 eyes. Front long, prominent, convex, almost parallel below the eyes to 

 near the apex, then abruptly rounded to the clypeus. Clypeus rather large, 

 convex, regularly narrowing from base to apex. Pronotum short, one-half 

 the length of the vertex ; anterior and posterior margins nearly parallel, 

 the latter a little angulate-emarginate ; the surfaces transversely wrinkled 

 on the posterior half. Scutellum small, the transverse impressed line dis- 

 tinct. Elytra short, parallel margined, elliptically rounded at apex, reach- 

 ing to about the base of the apical tergal segment ; nervures indistinct, 

 bordered either side by a row of punctures, the venation similar to con- 

 sobrina, there being but one transverse nervure. Wings rudimentary, about 

 half the length of the elytra. Last ventral segment rather long, its apical 

 margin broadly rounded and a little notched at the middle. Color pale 

 green, tinged with yellow on the head, the abdomen more or less fulvous; 

 superior genital segment sometimes marked with black at base ; the ovi- 

 duct brown. 



Male more whitish and clothed with a white bloom ; vertex and prono- 

 tum with two slightly diverging broken fuscous vittae forming two pairs 

 of spots on the vertex. Tergum mostly black ; inner surface of the ante- 

 rior and intermediate tibiae, apex of the tarsi, a spot on either side of the 

 pygofers at base and the tips of the plates black. Elytra in this sex attain- 

 ing the tip of the abdomen. Valve wanting; plates linear, long, curved 

 upward and somewhat surpassing the anal tube. 



Described from one male and seven female examples taken 

 by Mr. Giffard at Lands End and Golden Gate Park, San 

 Francisco, in June and July and in San Mateo Co. in June. 

 Superficially this insect resembles a Ncocoelidia, but differs in 

 the more triangular head, the superior ocelli, short antennal 



