16G 



C. biviltatiis, Uliler, Say's Ent., ed. Lee. II, 288; Harr. Rep., 3d ed.. 174. 



Syn., Oryllm birittatus, Say, Jour. Acad. Nat. Sci. Phila., IV, 308; Eut., ed. 

 Lee, II, 237. 

 Locusta leucostoma, Kirby, Faun. Bor. Am. lus., 250. 

 Acridium sanguinipes, Harr., Hitch., Eep., 583 ; Cat., 56. 

 flavovittatum, Harr., Treat., ed. 1802, 173. 

 hivittatum, Thos., Trans. III. Agl. Soc, V, 449. 

 Jeucostomum (?), De Haan, Bijdr. Kenn. Ortbop., 143. 

 fenioratum (?), De Haan, Bijdr. Kenn. Orthop., 144. 

 Caloptenus femoratus, Burm., Handb. Ent., II, 308. 



Vertex of the female convex or but slightly depressed, and the frontal 

 costa not sulcate ; frontal costa of the male salcate. Elytra and wings but 

 little longer than the abdomen. The last ventral segment of the male has 

 the apical margin entire, circular. Pronotum with the sides straight, slightly 

 converging anteriorly ; posterior cross-incision distinct. Posterior femora 

 equal to or passing the abdomen. 



Color. — Dull-green or olive-brown, with a yellowish stripe along each 

 lateral angle from the upper angle of the eye to the extremity of the elytra. 

 Mouth pale; face varies from yellowish to olive-brown; the disk of the pro- 

 notum from pale reddish-brown to dark olive-brown ; as also do the elytra. 

 The elytra sometimes have a few small, dusky spots on the disk, but gener- 

 ally they are unspotted. Wings transparent, tinged with green ; nerves 

 greenish-brown or blackish. Hind femora generally with a dark stripe along 

 the upper edge of the disk, yellow below ; upper edge with two pale spots ; 

 posterior tibiae red. 



Dimensions. — Varies much in size. 9 Length, 1 to 1.62 inches; elytra, 

 0.76 to 1.20 inches; hind femora, 0.62 to 0.90 inch. Male a little smaller. 



It has been found in Maine, Massachusetts, Connecticut, New York, 

 Pennsylvania, Maryland, Carolina, Mississippi, Tennessee, Texas, Arkansas, 

 Illinois, Missouri, Kansas, Nebraska, Iowa, Minnesota, Dakota, Colorado, 

 Wyoming, Utah, Idaho, and Montana. 



C. differentialis, Thos., Proc. Acad. Sci. Phila., 1871. 



Syn., Acridium differentiale, Uhler, MSS., Thos., Trans. 111.- St. Agl. Soc, V, 450. 

 Cyrtacanthacris differentialis, Walk., Gat. Denuap. Salt„ IV, 010. 



Large size, robust; elytra passing the abdomen, unspotted; olive-browu 

 above, yellow beneath. 



Vertex elongate, depressed, broadly sulcate, closed in front ; frontal costa 



