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



274. Thamnotcttix montanus Van D. Santa Cruz Co., 

 June 9, 1917; Contra Costa Co., June 14, 1917; Portland, 

 Oreg., July 3, 1917; Seattle, Wash., July 7, 1917. 



275. Thamnotcttix montanus reductus, new variety 



This form seems to be purely a color variety in which the 

 yellow saddle is reduced to a small mark on the apex of the 

 claval nervures, often on the outer nervure only, or in a few 

 dark males it may be entirely wanting. The brown band on 

 the base of the vertex is also reduced, sometimes to a mere 

 shade, but there may be a dark line next the eye and a gem- 

 inate spot on the basal middle. Both forms are found to- 

 gether throughout their range, but the present form is much 

 more abundant toward the south, while those from Oregon 

 and Washington are almost entirely typical montanus. 



Holotype (No. 366), male, from Santa Cruz Co., in collec- 

 tion of the California Academy of Sciences. 



Allotype, female, from Santa Cruz Co., in collection of Mr. 

 Giffard. 



Paratypes in both collections and in that of the author. 



276. Thamnotettix atireohis Van D. Santa Clara Co., June 

 9, 1917; Muir Woods, July 15, 1917; Dublin Canyon, May 

 6, 1917; Wawona, June 17, 1916; Fallen Leaf Lake, August 

 21, 1916; Tallac, August 22, 1916; Tahoe City, August 23, 

 1916; Donner Lake, August 24, 1916; Summit, Placer Co., 

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

 1916. In this species, as I have here identified it, the vertex 

 is decidedly, almost acutely, angled ; the color is smoky brown 

 with the vertex and scutellum often paler or almost yellow, 

 and the apex of the two claval nervures are pale. The elytra 

 become smoky-hyaline toward the costa and the lower surface 

 is paler, becoming pale yellow in some individuals from near 

 the coast. The last ventral segrnent of the female is excavated 

 for about half its width with a ligulate median tooth which 

 attains the line of the lateral angles. My original description 

 must have been drawn up from an immature example, as 

 some immature specimens before me agree exactly with it. 

 This species may best be distinguished from flavocapitatiis by 

 its longer and more acute vertex. 



