278. 

 POLYDRUSUS SPECIOSUS. 



Order Coledptera. Fam. Curculionidae Lat., Leach. 



Type of the Genus, Curculio cervinus Linn. 



PoLYDRUSus Germ., Dej., Ste. — Polydrosus & Phyllerastes Scho. — 

 Phyllobius Scho. — Brachyrhinus Lat. — Curculio Linn., Fab., 

 DeG., Mar., Don. 



Antenna inserted on the sides of the rostrum near to the apex, 

 as long or longer than the head and thorax, geniculated, slender 

 and pubescent ; 1 2-jointed, basal joint long and clavate, 2nd ra- 

 ther shorter than the 3rd which is longer than any of the follow- 

 ing, all of them being sub-obconic, 9th and remainder forming 

 a fusiform club, the 10th joint being the broadest, the apical 

 joint minute (6). 

 Labrum none. 



Mandibles subquadrate convex and rounded externally, produ- 

 cing 2 or 3 bristles, concave on the inside (2) . 

 MaxillcB short, terminated by a rounded lobe ciliated with strong 

 bristles, and 2 teeth at the base, beneath vyhich are a few long 

 hairs. Palpi longer than the maxillae, triarticulate, basal joint 

 the longest, 2nd subquadrate, 3rd a little slenderer, attenuated 

 and truncated (3). 



Mentum obovate, smooth. Palpi short, triarticulate, basal joint 

 most robust, quadrate, 2nd small quadrate, 3rd slender, oval (4). 

 Labium none. 

 Head exserted, subcylindric, the Rostrum short narrowed and nutant, 

 with a groove on each side meeting beneath (7*). Clypeus deeply 

 emarginate and ciliated (J). Eyes lateral, suborbicular, not very pro- 

 minent. Thorax cylindric broader than the head but narrowed ante- 

 riorly, short and truncated. Scutellum minute, subovate. Elytra twice 

 as broad as the thorax subovate, the shoulders obtuse, the apex slightly 

 acuminated. Wings ample. Legs rather slender. Thighs incras- 

 sated, sometimes toothed. Tibiae somewhat compressed and dilated at 

 the apex. Tarsi not so long as the tibia, spongy beneath, and pilose ; 

 A-jointed, basal joint as long as the terminal one, 2nd rather shorter, 

 3 I'd perfectly bilobed, 4th clavate. Claws small and bent (5). 



Speciosus Rudd MSS. — Steph. 



Male much narrower than the female, black, shagreened with 

 bright green scales tinged with yellow. Eyes black, with a small 

 cleft between them. Elytra boat-shaped, with 10 strong and 

 punctured channels on each. Antennae slender, testaceous, the 

 club black. Feet deep ochreous, the thighs and base of the 

 tibiae partially clothed with aureous green scales. 



In the Cabinets of Mr. Rudd and the Author. 



The laborious investigations of Shonherr are of the first im- 

 portance in studying the Curculionidae ; but as his distinctive 



