Priobium.] SERRICORNIA. 189 



PRXOBXTTM, Motschulsky. (Grynobius, Thomson.) 



Three species belonging to this genus have been described, all of 

 which occur in Europe ; they closely resemble Anobium, but may be 

 known by having the thorax not margined at sides, and the last three 

 joints of the antennae less elongate. 



P. castaneum, F. (tomentosum, Muls.). Oblong, subcylindrical, 

 of a dull fuscous-brown or reddish-brown colour, clothed with short 

 yellowish pubescence, antennae and legs red; head rather large, with 

 eyes prominent, antennae short, with the first and second joints 

 enlarged, and the last three forming an elongate club, which is longer in 

 the male than in the female ; thorax broader than long, considerably 

 narrower than elytra, -with the sides rounded and not margined, con- 

 tracted in front, with a more or less distinct longitudinal central furrow ; 

 upper surface very thickly and finely and rugosely punctured ; scutellum 

 round, rather prominent, strongly pubescent ; elytra parallel-sided, more 

 rounded at apex in the female than in the male, with very strong 

 crenate punctured striae, and the interstices finely but plainly 

 punctured; legs moderately robust, with the tarsi rather broad. L. 

 4-5 mm. 



In dead hedges, old posts, Ac. ; rather common, and apparently generally distri- 

 buted throughout the greater part of England and Wales, but rarer further north ; 

 Scotland, rare, on trunks of trees, Tweed, Forth, Tay, and Moray districts ; Ireland, 

 Armagh and near Dublin, and probably generally distributed. 



ANOBXU9K, Fabricius. (Byrrhus, Geoffroy.) 



This genus contains more than fifty species, of which about half are 

 found in Europe; the remainder have been described from North 

 America, Mexico, Chili, South Africa, Madeira, Ceylon, and New 

 Zealand ; they may be known by their subcylindrical form, margined 

 thorax, regularly striated elytra, and strongly dcflexed head, and also by 

 having the last three joints of the antennae elongate, but evidently 

 broader than the preceding ; four species occur in Britain, which may 

 be distinguished as follows : 



I. Eyes not hairy; antenna) with the second joint about 



equal in length to third. 



L Anterior part of metasternum excavated to receive 

 antenna?. 



1. Thorax with a large patch of yellowish pubescence 

 on each side near posterior angles, which are 

 right angles; alternate interstices of elytra dis- 

 tinctly raised at base ; size larger A. DINT ICOLLI, Pans. 



2. Thorax with at most a small indistinct patch of 

 greyish pubescence on each side near posterior 

 angles, which are obtuse ; alternate interstices 



of elytra not or scarcely raised ; sixe smaller . . A. DOMKSTICUM, Fourc. 



