165 



collections in person) ; Minnesota, Wisconsin, Dakota (Sciukler) ; Texas, 

 Arizona, British America (Thomas). 



Remark. — I have traced this species from Texas northward to the north 

 shore of Lake Winnipeg, in British America, and from the Mississippi River 

 westward to the Sierra Nevada range. It does not apj^ear to be found in 

 California, and but a short distance southward in Arizona. 



I am half-way inclined to the opinion that future investigations will show 

 that this is really the destructive species in California, and not QLdipoda atrox, 

 for it would seem impossible for the latter to sustain itself during a lengthened 

 flight with its short wings. 



C. griseus, Thos., Geol. Surv. Terr., 1871, 454. 



Head quite large ; occiput elevated. Dark-gray, with fuscous and yel- 

 lowish spots. 



Female. — Occiput unusually convex and prominent ; seen from the side, 

 the top of the head rises considerably above the disk of the jJi'onotum ; 

 lateral carinse of the face but slightly divergent. Posterior lobe of the pro- 

 notum densely punctured. Elytra passing the abdomen one-fourth their 

 length. Upper and lower valves of the ovipositor slender, without any lateral 

 angulations, not much excavated. Posterior femora passing the abdomen. 

 Prosternal spine short, obtuse, and slightly transverse. 



Color. — Face lurid, with numerous small, black spots. Occiput and pro- 

 notum gray, with a brassy tinge, irregularly spotted with black ; behind each 

 eye, reaching to the last transverse incision of the pronotum, is an interrupted 

 broad piceous stripe ; the sides of the pronotum below this somewhat lurid. 

 Elytra dark-gray; nervules whitish ; marked somewhat regularly with sub- 

 quadrate, black, or fuscous spots, not confined to the disk, but extending 

 equally above and below, becoming dimmer toward the apex, but distinct. 

 Wings (not spread in only specimen seen) appear to be dusky toward the 

 apex. Posterior femora with three yellowish bands ; rest of the disk black, 

 sulcus and interior carina beneath bright- red ; tibiae purplish-red beneath, 

 with a paler ring near the base; spines black ; legs hairy. Venter yellowish 



Dimensions. — Length to tip of elytra, 1.08 inches; elytra, 0.76 inch; 

 posterior femora, 0.62 inch ; posterior tibiae, 0.45 inch. 



Ohio (Dodge). 



