3^ 



387. 



ANOBIUM PERTINAX. 



The obstinate Death-watch. 



Order Coleoptera. Fam. Ptinidae. 



Type of the Genus, Ptinus tesselliitus Linn. 



Anobium Fab., Ol'w., Lot., Curt. — Ptinus Linn., Mars. — Byrrhus 

 Geof. — Dermestes Thunh. 



Antenna inserted close to and before the eyes, pilose, clavate, as 

 long as the thorax, 1 1 -jointed, basal joint subglobose, 2nd short 

 ovate, 3rd a little longer, subcylindric, 5 following obovate-trun- 

 cate, not longer than the third but stouter, 9th 10th and 11th 

 large, forming an elongated club, the two former truncated, the 

 last elongate-ovate conical (6). 

 Labrum transverse-oval, ciliated with long hairs (1). 

 Mandibles subquadrate, truncated obliquely, forming 2 strong 

 teeth at the apex, with a small tuft of hairs near the base on the 

 inside, externally pilose (2). 



MaxiUce formed of 2 large rounded and hairy lobes, the external 

 one extending very far beyond the other. Palpi not longer than 

 the labial, pilose and 4-jointed, basal joint small, 2nd longer, 

 3rd somewhat cup-shaped, scarcely longer than the 1st, 4th the 

 longest lanceolate obtuse (3). 



Mentum transverse subtrigonate-truncate, the sides sinuated and 

 pilose. Lip large, obcordiform and pilose at the margin. Palpi 

 inserted near the sides, rather long pilose and triarticulate, basal 

 joint rather the smallest clavate, 2nd a little larger, 3rd the 

 largest, sublanceolate being truncated obliquely (4). 

 Head concealed by the thorax : eyes small lateral and globose, {7 front 

 view of head). Thorax large globose or arcuated, sides rounded and 

 reflexed, anterior and posterior margins convex. Scutellum small 

 and rounded. Elytra very long cylindric and elliptical. Wings 

 ample. Legs compressed. Thighs grooved beneath to receive the 

 Tibiae which are slightly dilated at the apex and furnished with mi- 

 nute spurs. Tarsi nearly of equal length 5 -jointed, very pilose be- 

 neath, basal joint the longest obtrigonate, the remainder short, cup- 

 or heart-shaped, terminal joint obovate. Claws small but acute (5). 

 LarvBe fleshy cylindric slighlly hairy, head small, but distinct, man- 

 dibles similar to those of the perfect insect, 6 pectoral feet; apex of 

 abdomen incurved. 



Pertinax Linn. Faun. Suec. 142. 414. Curt. Guide, Gen. 290. 3. 

 Castaneous brown, densely clothed with short hair. Palpi ochre- 

 ous. Antennae castaneous. Head and thorax granulated, face 

 clothed with yellowish pubescence, thorax vvith a fovea on the 

 crown and one at each of the anterior angles, posterior angles 

 acute, hinder portion grooved transversely and clothed with 

 shining ochreous pubescence; an elevated and channeled ridge 

 next the scutellum, which as well as the shoulders are clothed 

 with ochreous pubescence. Elytra appearing slightly granulated, 

 with 1 1 deeply punctured striae on each, the sutural one abbre- 

 viated : underside and legs clothed with yellowish pubescence, 

 the latter more or less castaneous, 



7/1 the Cabinets of Mr. Marshall, Mr. Dale, and the Author. 



