THE LAMELLICORN BEETLES. 987 



1845 (5851). COTALPA LANIGERA Linn., System Natura (10th Ed.), 17GO, 

 350. 



Broadly oval, robust. Head, thorax and scn- 

 tellum greenish or yellowish with a strong metallic 

 lustre; under surface piceous, bronzed, rather 

 densely clothed with long, wool-like hair, the legs 

 sometimes paler ; elytra yellowish, feebly shining. 

 Thorax twice as broad as long, sides broadly 

 rounded, surface very finely and sparsely punctate. 

 Elytra with a depression each side near the hu- 

 merns, their punctures coarser than those of tho- 

 rax, and arranged in rows which are visible only 

 beneath a lens. Length 20-26 mm. (Fig. 407.) 



Throughout the State but scarce. April Fig - / 4 ?I; Natural size. 



(After Forbes.) 



4-August 26. Often found in the washup 



along the beach of Lake Michigan. One specimen from Putnam 

 County presents a curious color variation. The top of head and 

 thorax is dark green. One of the elytra is almost wholly fuscous, 

 only a small space in the outer apical fourth being yellow ; the other 

 one has a broad, fuscous sutural stripe extending from apex to 

 base and along the latter to the humerus, where it is recurved. 

 Otherwise it agrees with the common forms of the species and is 

 therefore to be recorded only as a sport. 



XXVIII. POLYMGECHUS Lee. 15S. (Gr., "much + adulterous.") 



This genus comprises a single species which, in addition to the 

 characters given in key, has the clypeus somewhat trilobed and 

 separated from the front by an elevated carina, which is inter- 

 rupted at middle ; mandibles witli outer edge entire, the tips turned 

 upward; legs short and stout, tibije not longer than the femora, 

 tarsi as long or longer than tibia 1 ; tarsal claws dissimilar in the 

 sexes, those of the female simple, feebly curved and alike on all the 

 legs; those of male, with outer claw of front leg with a trace of 

 tooth at middle ; outer claw of middle and hind legs deeply divided, 

 the lower division forming a tooth as long as the upper; the other 

 claws simple. 



1S4G (5857). POLYMCECHUS BREYIPES Lee., Proc. Phil. Acad. Nat. Sci., 

 VIII, 1850, 24. 



Oblong-oval, convex. Dark chestnut-brown to piceous. Head coarsely, 

 rugosely punctate; clypeus two-toothed, its margin retiexed. Thorax one- 

 third wider than long, strongly convex, sides rounded; surface sparsely and 

 finely punctate, more closely and coarsely on sides. Elytra striate, the 

 strife coarsely punctate ; the outer ones regular, those next the suture much 



