1922] Olsen: Cicadella of North America 363 



this, the front or face is considerably less convex and usually 

 very pale with much less marking than is found in hieroglyphica 

 and its varieties. Comparing it with hieroglyphica both in 

 width and length, its head is broader and shorter in comparison 

 to its total length; the lateral margins of vertex are straighter; 

 vertex not quite so convex ; elytra longer, mostly with a spotted 

 pattern seldom displaying any stripes; general color dark 

 brownish to bluish-black; markings on vertex quite different, 

 the longitudinal bar of the T and the black margins bordering 

 it are proportionately longer and thinner, appearing more 

 drawn out and crowded together; the apical black spot is 

 usually joined by the other black markings, sometimes barely 

 separatee!; face is pale, sometimes slightly * mottled ; front 

 broader, flatter, and not quite so strongly inflated. 



This species is undoubtedly confined to the extreme western 

 states, specimens are determined from British Columbia, 

 Washington, Idaho, and California. 



Certain forms of hieroglyphica, especially from Colorado, 

 (perhaps a new variety) very much resemble this species and 

 have probably been the cause of confusion; they can, however, 

 always be separated from it by the front being darker, more 

 mottled, narrowed and more inflated or convex, and their 

 shorter elytra and they do not have the slender black and light 

 lines on the disk of the vertex. Some of these specimens in the 

 National Museum collection where labeled with a Uhler ms. 

 name. 



Cicadella confluens var. uhleri Ball, 1901. 



This variety compares well with Uhler's confluens except in 

 color, which is a grayish-green with bluish, greenish or brownish 

 mottling, much lighter than typical confluens. Vertex, face, 

 scutellum and costal margins of elytra usually brighter and 

 more yellowish; black markings of vertex and scutellum are 

 more delicate and fainter, sometimes vanishing; it also has 

 longer elytra. 



Occurring practically with confluens, perhaps ranging more 

 eastward toward the Rocky Mountains. Specimens at hand 

 from Washington, California, Nevada and Colorado. These 

 localities conform with Dr. Ball's (1901) statement of distribu- 

 tion which names the states in the Rocky Mountain region 

 except Montana and follows westward to the coast. Tucker 



