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314. 

 SARROTRIUM MUTICUM. 



Order Coleoptera. Fam. Tenebrionidae Lat. 



Tijpe of the Genus, Hispa mutica Linn. 



Sarrotrium ///., Fab., Lat. — Oithoceius Lat. — Hispa Linn., Panz., 

 Mars. — Dermestes Linn. — Ptilinus Fab. — Tenebrio DeG. 

 Antenna inserted before the eyes on each side the clypeus, rather 

 longer than the head, perfoliate, robust, clothed with scaly hairs 

 and very pilose, excepting the 2 basal joints ; 10-jointed, 1st 

 and 2nd joints subovate, the remainder cupshaped, increasing 

 in diameter to the last, which is not so broad, and less pilose 

 and ovate (6). 



Labrum horny, semicircular and ciliated (1). 

 Mandibles small, bent, somewhat acute, external and internal 

 margins sinuated, the latter produced and forming a submem- 

 branous pubescent lobe (2). 



Maxillce small, with 2 lobes, long linear and pilose, especially 

 at the apex, the external one the broadest. Paljn not long but 

 rather stout and slightly pilose, 4-jointed, basal joint small, 2nd 

 and 3rd somewhat cupshaped, 4th subovate-truncate (3). 

 Mentum very rigid, sparingly pilose, subsemicircular, emargi- 

 nated before. Labium narrower, horny and naked, subquadrate, 

 slightly concave before. Palpi inserted in cavities on each 

 side, short and triarticulate, basal joint very minute, 2nd subglo- 

 bose, 3rd subconic, with a vesicle at the top and producing a 

 few bristles (4). 

 Head Jiat subquadrate. Eyes small lateral. Thorax rather broader 

 and convex, subquadrate, but rounded a little behind. Scutellum 

 minute. Elytra convex, elliptical. Wings ample with a yellow spot 

 on the inferior margin. Legs rather short. Thighs not very robust. 

 Tibiae stout and simple, not spurred. Tarsi nearly as long as the 

 tibicB, all 4-joinfed, basal joint a little larger than the 2nd and 3rd, 

 which are subglobose and depressed, 4th as long as the others united, 

 subclavate. Claws short, stro7ig and simple {5, afore leg ; 5 1 por- 

 tion of hind leg). 



MuTicuM Linn. Syst. Nat. p. 604. ?i. 4. — Curtis's Guide, Gen. 257. — 

 clavicornis Linn. F. S. — hirticornis Lat. 



Dull black, rugose, covered with very short depressed rigid and 

 somewhat hoary bristles. Antennae with the two basal joints 

 gray. Head and thorax rugose with punctures, the former 

 sloped off a little in front, and the sides elevated towards the 

 front, where the antennae are inserted j the thorax has a very 

 large channel down the middle, sometimes interrupted and form- 

 ing a fovea at the base. Elytra with 3 elevated lines on each, 

 and 2 rows of large punctures between each of the ridges. 



In the Author's and other Cabinets. 



