NATURAL SCIENCES OP PHILADELPHIA. 231 



of fine dense hair; prothorax gibbous above and marked with small rounded 

 tubercles, excavated beneath for the reception of the head. Elytra granulate, 

 and with indistinct rows of large punctures. Eyes small, convex; antennae 

 11-jointed, last three joints elongated, not longer together than all the pre- 

 ceding united in the female, but longer in the male ; first moderately dilated, 

 second not so stout, and shorter than the first, third as long as the second, 

 but more slender, fourth to eighth nearly equal, oblong, a little longer than 

 their width. Prosternum widely truncate behind, anterior coxae distant, 

 small, rounded, prominent ; mesosternum broadly concave, with a slightly 

 elevated ridge each side beyond the middle coxae, which are widely separated ; 

 tip broadly truncate, closely joined with the metasternum ; the latter is 

 marked with a very short furrow behind; the hind coxae are distant, and 

 their plates are moderately and somewhat suddenly dilated iuwards. The 

 ventral segments are not connate, though they appear more closely united 

 than usual; the second and third segments are a little longer than the others. 

 Legs rather short, thighs feebly clavate, tibiae slender, pubescent, and with 

 fringes of long hairs; tarsi short, broadly dilated, joints about equal iu 

 length, fifth broad, triangular, hairy beneath like the others, claws distant, 

 dilated at base into a broad semi-transparent tooth. The last joint of the 

 palpi is broadly truncate at tip. 



1. T. gibbosum Lee, Class. Col., 205. Anobium gibbosum Say, Journ. 

 Acad. Nat. Sci., v. 171, (ed. Le Conte, ii. 280.) 

 Middle States. Our most conspicuous species. 



NICOBIUM Lee, Class. Coll., 204, (1862.) 



Synonym. Anobium, subgenus N e o b i u m, Mils, and Rey., Col. France, 

 Terediles, 106, (1864.) 



This genus, represented only by the introduced European Anobium h i r t u m, 

 differs from the preceding by the less gibbous thorax, the claws not toothed, 

 but slightly broader at the base, and by the regularly striate elytra. The 

 form of body is rather stout and convex, with the thorax separated from the 

 elytra and a little narrower than them. The sterna, coxae, and tarsi are as in 

 Trichodesma, but the thighs are not at all clavate, and the claws are not 

 appendiculate. 



1. N. hirtum. Anobium hirtum Illiger, Mag. vi. 19, &c. An. (Neobiuvi) 

 hirtum Muls. and Rey., Terediles, 106. 



I have one specimen in my collection, marked as fouud in the Southern 

 States, probably in Georgia; it is incorrectly referred to in the Class. Col. 

 N. America, p. 205, as Anobium sericcum Muls. 



The species will readily be recognized by the stria; composed of large 

 quadrate punctures, and the interstices furnished with single rows of sub- 

 erect hairs, longer than the pubescence. 



HADROBREGMUS Thomson, Skand. Col., i. 89, (1859.) 



Synonyms. H em i c oelu s, p. Lee, Class. Coll.N. Am., 204, (1862.) C a c o- 

 t e m n u s Lee, ibid. Anobium, p. Muls. and Rey., Col. Fr. Terediles, 62. 



The body is long and subcylindrical ; the thorax gibbous or tuberculate, 

 excavated beneath for the reception of the head, hind angles not obvious, 

 except in H. foveatus. Elytra with regular punctured striae. Antennae 

 varying according to the division; in the second, 11-jointed, with the inter- 

 mediate joints well defined, and the last three not very much longer than 

 the preceding united ; in the first division (Cacotemnus) 10-joiuted, the 

 last three joints much longer than the joints 1 7 united. 



Prosternum subtruncate behind, separating the anterior coxae, which are 

 prominent and flattened in front ; mesosternum concave, truncate behind, 



1865.] 



