66 



7 - /^3o? 

 402. 



CIS BIDENTATUS. 



Order Coleoptera. Fam. Cisidae or Bostricida;. 



Type of the Genus, Anobium Boleti Fab. 



Cis Lat.,GyL,Sam.,Curt. — Anobium Fah., Oliv.,Panz. — Ptinus iTfmrs. 

 AntenncB inserted before the eyes under the margin of the clypeus, 

 twice as long as the head, clavate, pilose, 10-jointed, basal joint 

 robust, somewhat ovate, 2nd ovate also and rather stouter than 

 the 5 following which are slender, 3rd joint longer than the 4 

 following, which decrease in length, the 7th being cup-shaped, 

 the remainder forming a triarticulate pubescent club, distinctly 

 articulated, the 8th and 9th joints cup-shaped, the 10th ovate, 

 acuminated at the apex (6). 



Labruni subovate, narrowed at the base, the sides thin, slightly 

 emarginate and producing a few short hairs (1). 

 Mandibles curved, stout, bifid at the apex (2). 

 Maxilke small, producing a bundle of broad bristles at the apex 

 and another on the inside. Palpi stout, longer than the maxilla, 

 slightly hairy, 4-jointed, basal joint short curved and slender, 

 2nd stouter, obovate, truncated obliquely, 3rd cup-shaped, 4th 

 very large, ovate-conic (3). 



Mentum subovate-truncate. Lip larger, the anterior angles trun- 

 cated obliquely from whence arise the Palpi, which are short, 

 very robust and triarticulate, the basal joint transverse, 2nd sub- 

 globose, 3rd small mamillate (4). 

 Head short and semicircular. Eyes small lateral and globose. Thorax 

 large, convex, projecting over the head, the lateral margin convex 

 and marginated. Scutellum minute. Elytra convex elliptical. Wings 

 ample. Legs compressed. Thighs broad. Tibiae, anterior with the 

 external angle acuminated. Tarsi 4-jointed, 3 Jirst joints minute, the 

 basal one nearly concealed by the posterior tibiae, apical joint large, 

 and longer than the others united. Claws curved and acute (5). 



BiDENTATUS Oliv.2. No. 16. pi. 2.f. 5. mas. — inermis Marsh, fern. — 

 Curt. Guide, Gen. 328. 12. 



Male smooth, shining. Piceous or dull castaneous, sprinkled 

 with very short yellow hairs. Head concave, with a fovea in the 

 centre, the clypeus bidentate : eyes black: antennae ferruginous. 

 Thorax thickly punctured, very convex, the anterior margin 

 forming 2 robust conical protuberances. Elytra irregularly and 

 less thickly punctured (7 front view of head and thorax). 

 Female with the clypeus reflexed but simple, as well as the an- 

 terior portion of the thorax. 



Obs. In some males the clypeus is only emarginated, and the 

 tubercles on the thorax are less developed than in the specimen 

 represented. 



In the Author's and other Cabinets. 



