218 H. C. FALL. 



EUPACTUS LeCoute. 



Elongate oval, very convex, either glabrous or with very fine 

 short appressed pubescence. Head with oblique impressed frontal 

 lines extending forward to the sharply impressed clypeal suture. 

 Eyes rather large, moderately convex. Antennae 11-jointed; first 

 joint large, curved ; second scarcely narrower and much smaller, 

 somewhat compressed and a little produced inward ; third much 

 narrower, elongate-triangular; fourth to eighth as wide as the third, 

 short, transverse, the third, fifth and seventh sometimes subequal to, 

 sometimes obviously larger than the fourth, sixth and eighth ; ninth 

 much wider, compressed, parallel in outer two thirds; and about 

 equal in length to joints 3-8 united ; tenth and eleventh closely 

 united, forming an oblong mass rounded at apex, as wide as and a 

 little longer than the ninth. Palpi with the last joint more or less 

 elongate triangular, the apex somewhat obliquely truncate, and 

 sometimes emarginate. Prothorax narrowed in front and deeply 

 excavated beneath for the head, side margins very narrow and not 

 visible from above; disk evenly convex. Elytra irregularly punc- 

 tate, not infrequently with one or two deep marginal striae ; very 

 rarely with (fiscal striae. Head not impressed or excavated beneath 

 for the antennae. Anterior coxae widely separated, their apices ex- 

 panded into large transverse horizontal plates which are exposed 

 when the body is contracted, and are sculptured like the rest of the 

 lower surface. Mesosternum nearly vertical, channeled at middle. 

 Metasternum long, not sulcate, notched at middle of hind margin, 

 produced between the middle coxae into a short non-expanded lobe 

 which is emarginate in front for the ends of the antennae; sides 

 abruptly declivous and hollowed out for the reception of the middle 

 legs, the excavation limited by an elevated line; episterna narrowly 

 triangularly exposed. Plates of hind coxae gradually widened exter- 

 nally ; first ventral segment deeply excavated throughout its width 

 for the hind legs, segments 2-4 gradually decreasing in length, fifth 

 longer ; third and fourth sutures double. Legs slender ; tarsi very 

 short, robust, first joint scarcely longer. 



The difficulty of placing this singular genus has been already 

 alluded to in the preliminary remarks upon the Dorcatomini. At 

 the time of describing the genus two species only were known to 

 LeConte, though a third, pudicus Boh. was assumed to belong here. 

 The genus is now known to occur in our territory from New Eng- 



