1S2 THE CANADIAN ENTOMOLOGIST. 



secondaries beneath is pale and lacking in brilliance, and the wings above 

 show little or no tendency to ferruginous suffusion. 



This is an interesting, though by no means striking example of the 

 effects of environment in inducing a protective alteration in colour. The 

 form is a good geographical variety, and merits a distinctive name. 



Seventeen specimens from Blanco Co., Texas (Feb. and March). 



SOME CURIOUS CALIFORNIAN LEAF-HOPPERS. 



BY E. D. BALL, LOGAN, UTAH. 



The Jassid fauna of the Western Coast of North America is strikingly 

 different from that of the Mississippi Valley and the Rocky Mountain 

 Region. The DeUocepJialiiKe and Athysanince, which contained the 

 greater numbers of species in the eastern fauna, are almost wanting on the 

 coast. In place of these groups we find representatives of a number of 

 curious and aberrant genera, some of which are apparently restricted to 

 this region, while others occur in the fauna of Northern Europe. Several 

 of these genera have but a single representative in the European fauna, 

 while in most cases a number of species have been found in the coast 

 region. 



Errhomenelltis friscauus, n. sp. — Form of montanus nearly, but 

 smaller and paler. Female green, male green with black markings. 

 Length, $,55 mm.; $ , 4 mm. 



Vertex acutely conically-pointed in the female, shorter and more 

 angular with front in the male, longer than pronotum, ocelli placed closer 

 to the margin than in montanus. Front broad, tumid, slightly convex in 

 profile, ledge above antenna but slightly developed. Elytra reaching only 

 to the apex of last dorsal segment in b;>th sexes, exposing the pygofers, 

 their apices rounding, venation faint and weak, under wings about half the 

 length of the elytra. 



Colour : Female bright green, slightly whitish pubescent from sparse 

 white hairs; male pale, dirty straw-colour, with a pair of divergent bhek 

 stripes arising just behind the apex of vertex and extending onto elytra 

 from just outside the scutellum. Elytra smoky-black, with the nervures 

 light. Pale examples have the stripes reduced to three pairs of spots, 

 two pairs on vertex and an elongated pair on pronotum, and in this case 

 the elytra are mostly pale. 



Genitalia : Female segment moderately long, rounding posteriorly 

 and weakly notched ; male plates long, slender attingent. 



June, 1909 



