746. 

 PRIONUS CORIARIUS. 



Order Coleoptera. Fam. Prionidae. 



Type of the Genus, Cerambyx coriarius, Linn. 



Prionus Geo/., Fab., Oliv., Lat., Serv., Curt. — Cerambyx Linn., 

 Marsh. 



AntenncB inserted in front of a notch in the eyes, remote, a little 

 shorter than the body in the male, stout, serrated, somewhat 

 imbricated and 12-jointed, basal joint stout obovate, 2nd small 

 cu2)-shaped, 3rd the longest, the apex a little dilated, the re- 

 mainder decreasing in size, short and obtrigonate, the internal 

 angle acute, 12th joint elongate ovate, the apex truncated ob- 

 liquely : scarcely so long and not so stout in the female, 11- 

 jointed, 4th and following joints less trigonate, apical one longer 

 with 2 transverse ridges (6). 



Labrum visible, small, transverse, pocket-shaped, ciliated (1). 

 Mandibles porrected, crossing, stout and curved, concave, apex 

 beaked (2). 



Maxilla terminating in an elliptic, rigid, pubescent lobe. Palpi 

 attached to distinct scapes, pubescent, 4-jointed, basal joint 

 pear-shaped, 2nd stouter and much longer, a little inflated, 3rd 

 shorter, more pyriform-truncate, 4th the stoutest, a little longer 

 than the 2nd ; the apex obtuse (3). 



Mentum small, semiorbicular, the sides notched. Lip small, 

 narrow at the base, dilated before and hairy, forming 2 divari- 

 cating lobes. Palpi attached to 2 approximating scapes, as 

 large as the maxillary, pubescent, triarticvdate, basal joint small, 

 2nd large, clavate-truncate, 3rd a little larger more pyriform, 

 the apex obtuse (4). 

 Head porrected, somewhat conical : eyes large, remote from the base, 

 reniform, transverse, approximating on the crown. Thorax not much 

 broader than the head, transverse, the angles subacuminate, with a 

 strong spine on each side between them (T) .- scutel large semiovate. 

 Elytra twice as broad as the thorax, convex, a little attenuated, 

 slightly m.argined, the apex rounded, with a minute sutural spine : 

 wings ample. Legs stout, compressed : thighs stout : tibiae sca- 

 brous, channeled, narrowed at the base, anterior the shortest, hinder 

 the longest, a little scimitar-shaped, all emarginated at the apex, 

 with 2 short spurs : tarsi spongy beneath, 4-jointed, anterior a little 

 the broadest, basal joint obtrigonate, 2nd semiovate, Srdbilobed, 4th 

 long slender and clavate, with a minute joint or bulb at the base : 

 claws slender curved and acute. 

 Larva fleshy, naked, with 6 small pectoral feet , head coriaceous. Pupa 

 inclosed in a large thick cocoon formed of saw-dust or decayed wood. 

 Roesel v. 2. tab. 2. fig. 3-6. 



Coriarius Linn. — Curt. Guide, Gen. 400. 1. 



In the Author's and other Cabinets. 



