AMERICAN COLEOPTERA. 353 



M. faseiata, Fabr. (Ips.) Ent. Syst. ii., p. 511. — Black, glabrous, shining, 

 oblong ovate; head and thorax very finely and obsoletely punctulate, the 

 latter with the sides straight, strongly margined, base with a punctured fovea 

 on either side; elytra very finely seriate punctate, interstices finely and 

 sparsely punctulate; underside smooth, sides of presternum and first ventral 

 segment deeply punctate; elytra with a humeral ring prolonged inwards to- 

 wards the suture and a sub-apical fascia (interrupted at the suture) black. L. 

 •50— 60 inch. 



Middle and Southern States. (Leconte, Horn, Ulke.) 



]*I. heros. Say, (Engis) Journ. Acad, iii., p. 196; Lac. Erot., p. 67. — Very 

 similar to M. fasciata, but considerably larger, elytra entirely impunctate, 

 underside finely and rather densely punctate. L. -64 — -80 inch. 



% last ventral segment compresso-carinate at the apex. 



Southern and Western States (abundant), Middle States (rare). 

 (Leconte, Horn, Ulke.) 



M. IJlItei, sp. n.— Elongate oval, rather narrowed behind, black, shining, 

 elytra red-brown, each with four black spots (one humeral, two transverse at 

 one-third, one larger before the apex); head and thorax very coarsely and 

 sparsely punctate, the latter with a smooth space before the scutellum, sides 

 slightly rounded, evidently punctate striate, interstices very sparingly punctu- 

 late; underside with the sides of the prosternutn, metasternum and first ven- 

 tral segment coarsely punctate ; the presternum forms in the middle a broad 

 elevated triangle. L. -20 inch. 



Kentucky. (Ulke.) 



Triplacides. 

 Maxillary palpi with the last joint dilated, maxillae with the inter- 

 nal lobe unarmed, tarsi with the 4th joint very minute. 



ISC'IIYRUS, Lac. Erot., p. 89. (Type 4-punclatus, Oliv.) 

 Eyes large, coarsely granulated, mentum triangular, antennae with a 

 3-jointed club. 



I. 4-l»unet»tuS, Oliv. (Erotylus) Enc. Meth. Ins. vi., p. 437, 34. — Ovate, 

 sub-elongate, convex, black ; thorax coarsely and rather sparsely punctate, 

 fulvous, with four black dots arranged transversely across the middle, base 

 black in the centre, sinuate and more coarsely punctate on either side: elytra 

 punctate striate, interstices alutaceous, finely and obsoletely punctulate, with 

 a basal and median fascia and the apex, black ; the basal fascia is interrupted, 

 leaving a humeral vitta, the medial is very deeply dentate, and the apical 

 mark is prolonged slightly on to the disc of each elytron; underside coarsely 

 punctate, varied with red. L. -30 inch. 



Georgia, South Carolina, Texas, Missouri, Illinois. (Leconte. Horn, 

 Ulke.) 



The Mexican race of this species has the head pale. 



