106 IklANDIBULATA. — COLEOPTERA. 



Genus CCCCLXXXVII.— Astilbus, DUlwyn. 



Antenna; subclavate^ the basal joint large, clavatc, the two following shorter, 

 slender, clavate, the remainder turbinate-quadrate, the extreme joint being 

 longest and oblong-conic. Paljn maxiUai'ij filiform, with the penultimate 

 joint scarcely thickened, elongate, the terminal very minute, setiform: 

 lahrum subquadrate : /(cac? triangular, somewhat depressed : thorax oblong, 

 pidvinated, furrowed and immarginate : scutellum minute, triangular : elytra 

 about one-third the length of the abdomen ; the latter linear, recurved : 

 legs slender, simple; tibia with minute spurs at the apex; tarsi setaceous. 



Dr. Leach having apphed the manuscript name Drusilla to this 

 genus, a name subsequently pubhshed by Mr. Swainson to designate 

 a genus of diurnal Lepidoptera, it becomes necessary to alter it ; I 

 have therefore employed the term proposed by Mr. Dillwyn, in his 

 Catalogue of Swansea Insects, in order to prevent confusion by the 

 apphcation of a third name. The genus may be known by its fili- 

 form palpi, broad head, the stoutness and form of the articulations of 

 the antennae, channelled elongate thorax, the small spurs at the apex 

 of the tibia, and from its general habit being dissimilar to that of 

 the other genera. The species occur beneath stones, moss, in 

 fungi, &c. 



Sp. 1. canaliculatus. Rufescens, capite abdominisque cingulo nigris. (Long. 



Corp. 2 — 2 J lin.) 

 St. canaliculatus. Fabricius. — G.N. canaliculata. Steph. Catal. 260. iVo. 2591. 



Rufescent, rather obscure, and somewhat smooth ; head rather narrower than 

 the thorax, cordate, dusky: thorax with a deep longitudinal furrow, the 

 disc posteriorly sometimes depressed : elytra shorter than the thorax : 

 abdomen above thrice the length of the elytra, shining, recurved, slightly 

 pubescent, with the antepenultimate and penultimate segments black: 

 legs yellowish: antennae dusky, with the base flavescent: palpi reddish- 

 yellow. 



Very abundant in the vicinity of London ; also, I believe, in other 

 parts of the country. " About Salthouse-point, and sometimes on 

 the sand-hills (near Swansea)." — L. W. Dillwyn^ Esq. 



Genus CCCCLXXXVII!.— Dinauda, Leach MSS. 



Antenna; short, incrassated at the apex, stout, with the basal joint long, 

 clavate, the intermediate ones coarctate, the terminal one large, elongate. 

 Paipi maxillary rather long, labial very short : head transverse, forehead 



