Vol. VII] GIFFARD— CALIFORNIA HEMIPTERA 299 



277. Thamnotcttix flavocapitatiis Van D. San Francisco, 

 July 13, 1917; Crystal Springs, San Mateo Co.. June 2S, 

 1916; Muir Woods, July 15, 1917; Niles Canyon, May 23,' 

 1916; Wawona, June 17, 1916; Fallen Leaf Lake Aucrust 

 21, 1916. 



278. Thamnotcttix commissus, new species 



Related to flavocapitatus and geminatns. Aspect of the former the 

 elytra subhyaline becoming fuscous at apex. Length 5-6 mm 



Vertex acutely right-angled, nearly two times as long on the middle 

 as next the eye. Front long and narrow, sides gradually approaching a 

 little more abruptly near the apex ; clypeus a little widened to the rounded 

 apex. Pronotum one-fourth longer than the vertex. Elytra as in oemi- 

 nafa, the costa gently curved. '"' 



Color yellow. Vertex and front tinged with fulvous, the base of the 

 former pale; frontal arcs faint, brown. Pronotum tinged with green. 

 Elytra hyahne, a little obscured at apex, the nervures strong, greenish 

 yellow, becommg fuscous about the apical areoles. Abdomen and breast 

 black with the margins of the segments yellow. Legs whitish, the spines 

 of the hmd tibiae set in black dots; genital pieces white. 



Last ventral segment of the female deeply broadlv excavated with a 

 hgulate median tooth nearly equalling the lateral angles. Valve of the 

 male short, rounded; plates small, long-triangular, subacute at apex, the 

 sides fringed with long white hairs; pygofers not exceeding the plates. 



Described from one pair taken by Mr. Giffard on Mt. 

 Tamalpais in August, 1916. and one female taken by me at 

 Hoberg's Resort, Lake Co., August 2, 1916. Distinguished 

 among our green species by the hyaline elytra with the yellow 

 veins becoming fuscous at apex. 



Holotype (No. 367), female, from Lake Co., in collection 

 of the California Academy of Sciences. 



Allotype, male, from Mt. Tamalpais, in collection of the 

 California Academy of Sciences. 



Paratype, female, in collection of Mr. Giffard. 



279. Thamnotcttix jamiatus Ball. San Francisco, Tune 25 

 1916. 



280. Thamnotcttix atridorsum Van D. Santa Clara Co., 

 June 10, 1917; Niles Canyon, Mav, 1916; Redwood Canyon, 

 July 2, 1916; August 6, 1916. 



281. Thamnotcttix titusi Ball. Crystal Springs, June 25, 

 1916; Santa Cruz Co., June 7, 1917; Monterey Co.. June 11, 

 1917; Muir Woods, July 16, 1917; Niles Canyon, May. 1916; 

 Redwood Canyon. July 2. 1916; Hoberg's Resort, Lake Co.,' 

 August 2, 1916. Common everywhere on sage brush. 



