B0STRICHID7E. — HYLESINUS. 359 



Palpi very short : mandibles acute, stout, dentate within : head short, rohust ; 

 eyes oblong : thorax stout, convex, sinuated behind : body short, ovate : 

 tibiae compressed, denticulate at the apex : tarsi with the penultimate joint 

 bifid. 



Hylesinus is a genus of rather variable aspect ; nevertheless the 

 species may be known by the bifid penultimate joint of their tarsi, 

 united to their triarticulate, acuminated, club of the antennae. 



A. Body pubescent, a. Body somewhat elongate. 



Sp. 1 . crenatus. Niger, thorace inaequali, granulato-punctato, elytris profundi 

 crenato-striatis pedibusque piceis, antennis ferrugineis. (Long. Corp. 2 — 2^ 

 lin.) 



Hy. crenatus. Fabricius.—Steph. Catal. 146. No. 1468. 



Black, punctured: thorax unequal, thickly and coarsely punctured: elytra 

 piceous-black, very deeply crenate-striate, with the interstices rugose : femora 

 and tibiae piceous : tarsi and antennae ferruginous or castaneous. 



Elytra sometimes rufo-ferruginous; the result of immaturity. 



Found occasionally under the bark of old trees near the metro- 

 polis, in Kensington-gardens, &c. " In an old ash near Penller- 

 gare.' 1 — L. W. Dillwyn, Esq. 



Sp. 2. haemorrhoidalis. Niger, capite glabro, antennis ferrugineis, elytris striatis 



postice rufis. (Long. corp. 1^ lin.) 

 Ips haemorrhoidalis. Marsham. — Hy. haemorrhoidalis. Steph. Catal. 146. No. 



1469. 



Black, opaque, punctured : head glabrous : thorax rather deeply punctured : 

 elytra punctate-striate, black anteriorly, rufous at the apex : body beneath 

 and legs black ; tarsi and antennae ferruginous. 



Apparently scarce : I possess a specimen from the Marshamian 

 cabinet, and others caught near London. 



Sp. 3. picipennis. Ater, thorace aquali obsolete punctato, elytris nigro-piceis, 



antennis pedibusque rufo-ferrugineis. (Long. corp. 1£ lin.) 

 Hy. picipennis. Steph. Catal. 146. No. 1470. 



Deep black, somewhat opaque ; head punctulate : thorax equal, obsoletely but 

 finely punctured : elytra piceous, rather deeply crenate-striate, with the in- 

 terstices punctate : antennae and legs rufo-ferruginous. 



Found near London ; and in Lancashire. 



Mandibulata. Vol. III. 31st Dec, 1830. b b 



