Till': I. A \ii:i.i.ii(>i;x i!i:i;i'i.i;s. 



1)87 



lS4n (oSrtl). CoTATXA i.AMCKHA IJiHi.. S.vsttMu \ii(iir;i (10th Fid.), 1T()0, 



l'.i-(>,i(lly iival, rolmsl. Head, (liorax iiiul scii- 

 telluiii m'ccuish (ir xollowisli with a strong iiietallic 

 lustre ; u n d c v s u r f a c o piceuus, bronzed, rather 

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

 sometimes jialcr; elytra yellowish, feebly shining. 

 Thorax twice as i)road as long, sides broadly 

 rounded, surface very lincly and si)arsely pnnclali*. 

 l-;iy(ra witli .a <l«']'ressi(in each side near the Jiu- 

 iiicnis. tlicir iHinclnres co.-irser than tliose of Iho- 

 r.MX. and arranged in rows which are visible only 

 i)eneath a lens. Length 20-2G mm. (Fig. 407.) 



Tlironiilioiit tlie State but scarce. April 

 4-Aiia:ust 26. Often found in tlie washup 

 alons: the beach of Lake Michigan, (^ne speeiiucn from Pntnani 

 ('(Minty ])resents a curious eoh)r variation. The top of head and 

 tliora.x 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. 

 Othei-wise it agrees with the common forms of the species and is 

 therefore to be recorded only as a sport 



Fig. 407. Natural size. 

 (.\fter Forbes.) 



XXVIII. PoLYMCKCHUS Lee. 1858. (Or., "much + adultenms.") 



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

 characters given in key. has the clypeus somewhat trilobed and 

 s(>pa rated from the front by an elevated carina, which is inter- 

 iupt(Hl at middle; mandibles with outer edge entire, the tips turned 

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

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

 sextos, those of the fenuile 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. 



1840 (5857). PoLYMCECHUs BREviPES Lec., Froc. Phil. Acad. Nat. Sci., 

 VIII, 1856, 24. 

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

 rugosely punctate; clyi)eus two-toothed, its margin retlexed. Thorax one- 

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

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

 stria' coarsely punctate; the outer ones regular, those next the suture nuich 



