Vol. VII] GIFFARD— CALIFORNIA HEMIPTERA 315 



tion of the others a little infuscated in the macropterous form. In the 

 male the abdomen is black excepting a median vitta above and below and 

 the base of the tergum which is dull fulvous. Genital segment of the 

 male with the margins of the pygofer above and the anal tube pale. Legs 

 concolorous or obscurely lineated, the tips of the spines and the tarsal 

 claws black. 



Described from one male and four female examples taken 

 by Mr. Giffard at Portland. Oreg., on grasses, July 3, 1917. 

 One of the females is macropterous. This species has the 

 color, stout form and pale dorsal vitta of kilmani, but the 

 front and vertex are a little broader and the characters of 

 the male genitalia are entirely different. It gives me pleas- 

 ure to name this species for Mr. Frederick Muir of Honolulu, 

 who is giving this subfamily a much-needed and careful 

 revision. 



Holotype (No. 380), male, in collection of the California 

 Academy of Sciences. 



Allotype, female, in collection of Mr. Giffard. 

 Paratypes in both collections and in that of the author. 



349. Librunia semicinctus, new species 



Closely allied to muiri but with very different male genitalia; pale 

 yellowish-testaceous with a blackish cloud on either side of the tergum 

 and some blackish marks beneath, more extended in the male; frontal 

 carina pale or concolorous, the frontal fovas becoming darker apically next 

 the carinje. Length 2-3^ mm. to tip of the abdomen. 



Vertex broad, nearly square, shorter than in muiri, the anterior margin 

 but feebly arcuated ; median carina obtuse but moderately distinct over the 

 apex of the head. Front nearly as in muiri, the sides very slightly arcu- 

 ated in the female. Antennae as in the preceding, the first segment 

 scarcely longer than wide; the second attaining the base of the clypeus. 

 Pronotum as long as the vertex, the carinae rather obscure, the lateral 

 obviously curved around behind the eyes. Brachypterous elytra reaching 

 on to the fifth tergal segment, the macropterous exceeding the abdomen 

 by one-third their length. 



Genital segment of the male very short ; aperture transverse, very wide 

 below, the ventral wall nearly straight across ; dorsal sinus broad, reaching 

 to the preceding segment ; ventral nearly as deep as broad, its fundus 

 rounded. Stiles narrow and long, broadly divergent, nearly parallel to 

 the lower margin of the pygofer, a little curved and acute at apex; ventral 

 wall of the anal tube with a slender median prolongation which is ex- 

 panded interiorly as a broad plate and abruptly incurved beyond, its apex 

 nearly attaining the base of the stiles. Oviduct of the female short, black, 

 not nearly reaching the apex of the pygofers. 



Color dull yellowish-testaceous. Frontal fovae with a black vitta be- 

 yond the middle next the lateral carinse ; this vitta may be interrupted 

 above and may be widened below next the apex. Lateral fovae of the 

 clypeus usually black. Sides of the tergum with a more or less extended 

 blackish area; the pleural pieces and venter more or less maculated with 



