6 PROCEEDINGS OF THE NATIONAL MUSEUM vol.68 



the dorsal surface, and by the fact that the pronotum is distinctly 

 spinose at the sides, ajid the metasternum vertical in front. It is 

 more closely related to the genus Panj satis than the other species 

 found in this region. 



ACREPIDOPTERUM, new genus 



Mandibles large and rather thick at base. Head broad, moderately 

 concave between the antennal tubercles, the front wider than long, 

 and the cheeks short. Antennae about as long as the body, or at 

 most only slightly longer than it, and moderately ciliate beneath; 

 first joint robust, short, oblong-oval, without a cicatrix at apex, 

 and subequal in length to the third joint, which is considerably 

 shorter than the fourth, the following joints gradually diminishing 

 in length. Eyes small, coarsely granulated, deeply emarginate, and 

 the lower lobes wider than long. Pronotum nearly square, even, 

 regularly convex, and without tubercles on sides or disk. Scutellum 

 as wide as long, slightly triangular, and broadly rounded behind. 

 Elytra elongate, subparallel, transversely depressed on basal half, 

 and regularly convex posteriorly, humeri feebly developed, the sur- 

 face rather even, and without lateral carinae. Legs rather long 

 and subequal in length; femora gradually enlarged toward apex; 

 intermediate tibiae with a distinct groove ; tarsi rather short and 

 narrow, the first joint subequal in length to the following two joints 

 united, and the claws divergent. Mesosternum narrow between 

 coxae, truncate posteriorly, and feebly obliquely declivous in front. 

 Prosternal process narrow, arcuately declivous in front and behind, 

 and triangularly expanded behind the coxae. Anterior and middle 

 coxal cavities closed. 



Genotype. — Acrepidopterum minutwn, new species. 



Superficially, this genus resembles Zaplous LeConte, but can be 

 easily distinguished from that genus by its more elongate and 

 depressed form, antennae more slender, and the tarsal claws diver- 

 gent. It belongs to the tribe Ptericoptini and is somewhat allied to 

 Tethystola Thomson, but in that genus the head is strongly con- 

 cave between the antennal tubercles, front longer than wide, an- 

 tennae distinctly longer than the body, and the first joint shorter 

 than the third, eyes closer together on the top, the lower lobes 

 quadrate, and the body more elongate and narrow. 



ACREPIDOPTERUM MINUTUM. new species 



Form elongate, rather narrow, and subparallel; above reddish- 

 brown, the head, pronotum and scutellum moderately clothed with 

 short recumbent brownish-yellow pubescence, with a few paler hairs 

 intermixed; elytra clothed similarly to pronotum, but with numer- 

 ous longitudinal streaks of whitish pubescence and a few small black 



