BOSTRICHIDiE. — SCOLYTUS. 361 



Head and thorax fuscous or black : elytra rufescent, striated, with two or three 

 obscure spots upon each, continued on the suture : antennae totally and legs 

 rufous. 



Not uncommon near London; at Hertford, Ripley, &c. " Under 

 bark of rails near Sydenham. 11 — Mr. Ingpen. 



Sp. 8. sericeus. Cinereus, elytris ferrugineo obscure nebulosis, pe.libits fuscis, 



antennarum basi testaceo. (Long. corp. | lin.) 

 Ips sericeus. Marsham. — Hy. sericeus. Steph. Catah 146. JVo. 1475. 



Above totally clothed with cinereous scales ; the elytra ferruginous, obsoletely 

 striated, and obscurely clouded with dusky: antennas testaceous, with the 

 capitulum fuscescent: legs fuscous. 



Apparently rare, as I have seen but few examples : it is found 

 near London. 



Genus CCLXIX. — Scolytus, Geoffroy. 



Antenna; with the club commencing at the ninth joint ; the basal joint robust, a 

 little elongate; second short, subglobose; the third to the eighth transverse; 

 the remainder forming a compressed, ovate club, composed of closely united 

 laminae. Palpi unequal, the terminal joint somewhat elongate, slender: 

 mandibles triangular, entire : head subglobose : eyes elongate, curved : thorax 

 large, narrowed anteriorly : elytra cylindric, truncate : abdomen beneath ob- 

 liquely and abruptly truncate: tibiae compressed, simple, the external angle 

 terminating in a curved spine ; tarsi with the penultimate joint bifid. 



The sublaminated, obscurely triarticulate, club of the antennae of 

 these insects, united to the bifid penultimate joint of the tarsi, the 

 obliquely truncate, retuse, or submucronated abdomen, large thorax, 

 &c, sufficiently characterize the present genus ; of which the first 

 species has become somewhat conspicuous from the injury it has 

 recently created to the elm-trees in and about the metropolis. 



Sp. 1. Destructor. Niger, nitidus,antennis tarsisque ritfo-testaceis,thorace sub- 

 tilissime punctulato, elytris punctato-striatis, interstitlis vage punelulatis, ab~ 

 domine subtus retuso. (Long. corp. 1± — 3 lin.) 



Sc. Destructor. Olivier.— Curtis, I pi. 43.— Steph. Catal. 146. A r o. 1476. 



Black, very glossy: head black, longitudinally rugose: thorax large, very finely 

 punctulated : elytra glabrous, pitch y-black, or piceous, sometimes rufescent or 

 bright ferruginous, glossy, punctate-striate ; the interstices irregularly punc- 

 tate: abdomen beneath retuse, the first segment being very convex and 



B B l 3 



