412 G. R. CROTCH, M. A. 



B. — T : h'ff, smooth, or onh/ punctate nt the ha ftp. 



I. qnadrimaeiilatns. Auhe. Spec, vi , p. 274.— Slightly bronzed above, 

 not verv convex, dorsal lines tolerably visible, uniformly oval, tibia? punctate 

 at the base. L. "45 inch. 



Oregon. Russian America. 



I. bigllttlilllS. (Germ.) Ins. Sp. Nov.. p. 29. — Very closely resembling I. 

 4-macufatua, and hardly distinct; the tibia? are nearly smooth, only two or 

 three punctures being visible at the base, and it is decidedly smaller. L. •40 — 

 •42 inch. 



Var. laranneus, Lee Col. Kans. (1H59), p. 4.— Rather smaller than I. bijuttu- 

 lus, and with the sides of the thorax red. 

 Lake Superior, Pennsylvania, Georgia. 



I. frsiterciilus, Lee Proc. Phil. (1SR21, p 521.— 9 .—Differs from I. bi- 

 gnttulus only by the slightly more brassy color, and the rufous margins to the 

 elytra ; the posterior pale spot, is often obsolete. L. *42 inch. 

 North Red River, (Leconte). Kansas, (Horn). 



I. ignanis, Lee. Proc. Phil. ( 1862), p. 521. — Smaller, narrower and less 

 convex than the other species, color red-brown (but immature); more resem- 

 bling /. picipes, but more parallel. L. -30 inch. 



% anterior tarsal claw acutely dentate, anal segment acutely carinate. 

 Lake Superior. (Leconte.) 



91 ATI'S, Aube. Spec, vi., p. 3 0. (Type bicarinatus.) 

 Thorax margined, presternum deeply sulcate, metasternuni broad, 

 deeply emarginate in front, truncate behind, laciniae linear, abruptly 

 curved, episterna with the apical angle produced, bordering the coxal 

 plates; posterior femora without apical punctures, claws unequal. % 

 anterior and intermediate tarsi dilated, citiate beneath. 



91. bicarinatus, (Say) Tr. Am. Phil. ii.. 9S. — Elongate ovate, brownish- 

 red, surface minutely punctulate, interstices alutaceous; thorax with the sides 

 rounded, margined, anterior angles acute; elytra with the dorsal punctures 

 faintly marked : under surface punctulate, posterior femora smooth, tibiae 

 with one row of deeper punctures. 



COPTOTOMUS, Say, Tr. Am. Phil. iv.. 443. (Type serripalpus.) 

 Palpi emarginate at the apex, prosternuni with a high uniformly 

 elevated carina, metasternuui triangularly emarginate. sulcate behind, 

 laciniae curved linear, episterna not reaching the coxae; coxal proces- 

 ses rounded, median line sulcate, margin elevated, divergent, not join- 

 ing the metasternuui ; posterior femora smooth, angle not ciliated, 

 tibial spurs subequal; last joint of tarsi equal to the fourth, claws 

 equal. 



C. scrripalpus appears to be a Mexican species with the venter 

 piceous. 



