BOSTRICHIDiE. — TOMICUS. 355 



Sp. 1. cylindrus. Niger, elytris subcostatis profunda striatis, postice villosis 



retusis, antennis pedibusque castanets. (Long. corp. 3f lin.) 

 Ph. cylindrus. Herbst.— -Curtis, ii. pi. 51. — Steph. Catal. 145. No. 1467. 



Brownish-black, slightly villose: head anteriorly punctured and finely rugu- 

 losej thorax slightly punctulate, the back smooth, with an impressed line 

 behind : elytra punctured, deeply striated, the interstices elevated : the apex 

 retuse, dentate : antennae and legs castaneous. 



This singular insect was also discovered to inhabit Britain by 

 that industrious collector, Mr. Bydder, who found it in some plenty 

 in the New-forest: it has also, I believe, been found near Windsor; 

 but it appears to be local. 



Genus CCLXVII. — Tomicus, Lalreille. 



Antennas with the club commencing at the seventh joint; the basal joint robust, 

 elongate, clavate; the second stout, short, obconic; third small, slender at the 

 base; the three following very short, coarctate; the remainder forming a com- 

 pressed, suborbiculate, transversely annulated club, of which the basal joint 

 is largest. Palpi very short, the terminal joint ovate: mandibles triangular, 

 acute, dentate within : head much deflexed : thorax very large, gibbous, much 

 broader than the head in front : body cylindric : tibia? broad at the apex, and 

 serrated; tarsi with entire joints. 



The genus Tomicus is principally to be distinguished by having 

 a transversely annulated orbiculate club to the antenna?, the tarsi 

 simple, and the body in general cylindric: it, however, contains 

 insects of dissimilar form ; I have, therefore, been obliged to divide 

 it into sections. 



A. With the elytra entire behind, rounded, 

 a. The thorax narrowed anteriorly. 



Sp. 1. polygraphus. Fusco-piceus, pubescenti-scaber, antennis pedibusque pal- 

 lidis, elytris vix striatis, antennarum clavd \ subacuminatd. (Long. corp. l^lin.) 



De polygraphus. Linne. — To. polygraphus. Steph. Catal. 144. No. 1456. Var. 

 To. affinis. Steph. Catal 144. No. 1457. 



Fusco-piceous, pubescent, somewhat rugose : elytra obsoletely striated ; antennae 

 and legs pale testaceous ; the capitulum of the former subacuminate. 



Slightly variable in colour ; the To. affinis of my Catalague being a pale (pro- 

 bably immature) variety. 



This insect ill associates with the present genus. Rare ; but has 

 been captured near London. 



