CHRYSOMILID^l. Ill 



GrALERUCELLA PICEA. 



Gatterucdla picea Scudd., Rep. Prog. Geol. Surv. Can.. 1S77-7S. 182-183B (1879). 

 Gale-nicdln p-lceu Scudd.. Tert. Ins. N. A.. 485. pi. 2. tig. 31 (ISi)U); Contr. Canad. 

 Palseont., II. 32-33 (1892). 



Nine-mile Creek, British Columbia. 



ORYCTOSCIRTETES Scudder. 



Ory<'t*<-ii-t<1,x S-udd.. Bull. U. S. Geol. Surv. Terr.. II, 82, 83 (187(3). 



This genus belongs to the group of Chrysomelidae, of which Haltica 

 Illiger is the best known representative, the members of which are peculiar 

 for their swollen hind thighs, enabling them to spring to great distances. 

 It appears to belong to the group of (Eclioiiychites, in which the last tarsal 

 joint has ;i more or less prominent bulbous expansion on the hind legs: but 

 it differs from any of the genera described by Chapuis in the nature of this 

 expansion, as well as in other tarsal peculiarities. The basal joint of these 

 hind tarsi is moderately long and cylindrical, scarcely larger at the distal 

 than at the proximal extremity; the second and third joints are subequal, 

 the latter slightly the larger, together as long as the basal joint, moderately 

 lobate, the lobes pointed; while the apical joint is nearly as long as all the 

 other joints combined, enlarges gradually from base to apex, so as to be 

 fully two or three times as large at the distal as at the proximal extremity, 

 and bears a pair of exceedingly long and slender, apparently simple, very 

 slightly curved claws, nearly half as long as the apical joint itself. In 

 other respects it closely resembles the genus OEdionychis Latr. 



It is represented by a single species in the Oligocene of Colorado. 



ORYOTOSCIRTETES PROTOG^EUM. 



PI. XI. fig. 11. 

 Oi-i/i'toxrirfttix /irofiH/ifuin Scudd.. Bull. U. S. Geol. Surv. Terr., II, 83 (1876). 



A single specimen, pretty well preserved, and showing the dorsal sur- 

 face, was obtained by Dr. F. V. Hayden at what was formerly known as 

 Castello's ranch. The head is pretty large, nearly as broad as the prothorax, 

 the eyes moderately large, apparently circular, with large facets, their 

 average diameter being nearly 0.02 mm. The prothorax is broad, with 



