AMERICAN COLEOPTERA. 411 



ticis acutis, subsinuatis; scutello fere lseve; elytris elongato-ovatis posticesub- 

 dilatatis, serie una punctorum distincta, lateribus latissime reticularis, subopa- 

 cis(9); troohanteribus obtusis. L. 4£ Iin. 



San Francisco. 



[Allied to (J. sinuattis. but the sides of the elytra are broadly 

 reticulate.] 



I LYBI I IS, Er. Gen. Dyt., p. 34. (Type ater.) 

 Convex, thorax margined, prosternum acute, metasternum emargin- 

 ate, laciniae sub-triangular, episterna hardly reaching the coxal plates; 

 sculpture very close. % four anterior tarsi compressed, thickly 

 fringed beneath, claws rarely dilate, equal, anal segment strigose, with 

 a medial carina. 9 anal segment convex, emarginate. 



The sexual characters and general facies render this genus easily 

 distinguishable; the species go into two groups by the sculpture of 

 the posterior tibiae; to the first belongs (besides 7". ater), only /. 

 subaeneus from Europe. 



A. — Posterior tibiae, "punctate. 



I. ater, DeG. Mem. iv., 401, 8; ungularis, Lee. Proe. Phil. (1862), p. 521. — 

 Convex, rufo-pieeous, above bronzed and reddish-brown, the dorsal punctures 

 hardly visible, thorax broadly margined. L. -52 inch. 



£, arfal segment carinate, sub-strigose, anterior claws elongate, sinuate. 



Pennsylvania. (Leconte.) 



I. COilfliSUS, Aube, Spec, p. 280, 7; pleuriticus, Lee. Lake Sup., p. 213.— 



Smaller than I. ungularis and more brassy, the sculpture is also more open : 

 thorax finely margined, sides red ; elytra, with the margin broadly red from 

 the shoulders to beyond the middle; tibiae less coarsely punctate; laciniae of the 

 inetasternum more narrowed. L. -44 inch. 



Lake Superior, Pennsylvania. (Leconte.) 



I. SufTusiis, sp. n. — Closely resembling the two preceding, but more allied 

 to I. pleuriticus by the less coarsely punctate tibiae; color brassy, sculpture 

 very fine, the whole margin of the elytra broadly and irregularly ferruginous, 

 hiding the usual pale spots. L. -44 inch. 

 Indian Territory. (Horn.) 



I. viridiseneus, sp, n. — Closely allied to I. pleuriticus, but entirely green- 

 ish-brassy above, finely sculptured and less convex. L. -43 inch. 

 % anal segment coarsely strigose, concealing the usual carina. 

 Kansas, (Leconte). Hudson's Bay, (Horn). 



I. picipes, Kirby, Faun. B. A. iv., p. 71, t. 5, f. 6, a. — Smaller, more 

 elongate, less convex, above brassy, finely sculptured, the dorsal punctures 

 more visible; the pale elytral spots often obsolete. L. -38 inch. 



% anal segment sub-strigose, claws simple. 



Kansas, Lake Superior, Labrador. 



