Vol. VII] GIFFARD— CALIFORNIA HEMIPTERA 317 



and by the black line on the commissural margin at the apex 

 of the clavns. 



351. Liburnia pnella Van D. Mnir Woods, July 15, 1917; 

 Soda Springs, Placer Co., August 24, 1916; Portland, Oreg., 

 July 4, 1917; Seattle, Wash., July 8, 1917. 



352. Liburnia campestris Van D. Niles Canyon, May 31, 

 1917, one male; near Stockton, May 30, 1917, one female, 

 both^ being macropterous. 



353. Liburnia tnckeri Van D. Niles Canyon, September 

 3, 1916, one macropterous male; Monterey Co., June 11, 

 1917, six macropterous and nine brachypterous examples. 



354. Liburnia fluvialis, new species 



A large stout brown species closely resembling mag,nifrons ; alxlomen 

 and pleural pieces marked with black Length 3^/2 mm. 



Head short, broad, nearly as wide as the pronotum, broadly rounded 

 before in both diameters, apex smooth with the carinae obsolete there. 

 Vertex one-half broader than long, the fovse obscure. Front broad, a 

 little narrowed from ocelli to apex; carinse distinct below. Pronotum 

 nearly as long as the head viewed from above, almost truncate between 

 the eyes, feebly excavated behind ; carinae obtuse, indistinct. Mesonotum 

 a little longer than the pronotum, carinae normal but obtuse and indistinct. 

 Elytra almost attaining the apex of the second tergal segment, small, 

 truncated, the nervures distinct, concolorous. Abdomen broad, ovate, with 

 the median keel distinct. Hind tibia scarcely longer than its femora, the 

 calcar about one-half the length of the first tarsal segment, smooth, broad 

 at base, the sides straight, wanting the teeth usually found there. 



Color dull testaceous-brown, almost uniform. Front with a row of 

 obscure darker blotches next the carinae, sometimes wanting. Median line 

 of the tergum pale with a fuscous point on either side at each segment, 

 the posterior pair usually extended in a line ; sides of the tergum broadly 

 black more or less interrupted by an irregular pale mark on each segment, 

 the submargins of the segments with a black line either side the disk; 

 edge of the connexivum pale. Beneath pale, the sides of the venter marked 

 with fuscous. Legs pale, faintly lined with brown. Antennae pale, cheeks 

 with a brown spot at base of tine antennae. Anal tube black. Elytra nearly 

 hyaline with whitish nervures, the marginal heavy. Pro- and metapleura 

 with a row of fuscous spots. Male similar but with the dark markings 

 more pronounced. 



Male genitalia much as in consimilis. Aperture of the pygofers broad 

 below but with the sides well rounded ; ventral notch broad, moderately 

 deep, with its fundus rounded. Stiles broadly divergent, short and 

 straight. Apex of the anal tube forming a small lohc on either side below 

 the middle but scarcely produced ventrally. 



Described from two males and five females taken by Mr. 

 Giffard near Stockton, May 30, 1917. This species is appar- 

 ently quite near magnifrons, but is very distinct in the male 

 genital characters. 



