92 MANDILULATA. — COLEOl'TEKA. 



Tyclms differs from tlie other allied gcnerii by having the thorax 

 distinctly attenuated in front, the antenna* short, Avith the second 

 joint smaller than the first, and in the males the fifth joint remark- 

 ably incrassated. 



Sp. 1. niger. Niger, imhesccns, anicnnis icxiaci'is, jmbcsccntibux, tlioracc Icvvi, 

 antice angustato, clytris impresse striatis. (Long. corp. | — 1 liii.) 



Ps. niger. Paykull.—Ty. niger. Dennr/, M. j)L 6. f. l.—S/cplt. Cutal. 258. 

 No. 2557. 



Elack^ pubescent : head smooth : thorax also smooth and shining ; narrowed 

 anteriorly : elytra subquadrate, rather more than half the length of the 

 abdomen, slightly depressed at the base, with a single stria on each near the 

 suture : legs ferruginous : antennae testaceous, stout, of the male with the 

 fifth joint large : palpi pale yellowish. 



Elytra variable in colour ; black, red-brown, or castaneous : the result of 

 immaturity. 



Abundant in damp mossy places within the metropolitan district, 

 in the winter and early spring months. " Newcastle." — G. Wailes, 

 Esq. " Netley."— jRey. F. W. Hope. 



Genus CCCCLXXXII. — Arcopagus, Leach. 



AiitemicB as long as the head and thorax, with the two basal joints thickened, 

 the first elongated, cylindric m the male, dilated within in the female, the 

 second more slender than the first, subglobose, the six following smaller and 

 nearly equal ; ninth larger, lenticular-subglobose, tenth broader than the 

 ninth, transverse-lenticular; eleventh larger and broader, ovate, acute- 

 Palpi maxillary nearly as long as the antennse, the basal joint filiform, 

 gradually clavate, the second short, truncate, third ovate-securiform, with 

 the base very slender : head triangular ; thorax narrowed posteriorly : elytra 

 covering more than half the abdomen, of which the exposed segments are of 

 nearly equal size : femora thickened ; tibia slender. 



Arcopagus resembles Tychus in having the second joint of the 

 antennae smaller than the first, but it differs therefrom by having 

 the thorax wider in front than behind, as well as by the dissimilarity 

 in the proportions of the antennae, which are not remarkably dissi- 

 milar in the sexes, the basal joint alone being a little produced within 

 in the males. 



Sp. 1. giabricollis. Obscure ferrugineus, thorace capite longiori, obcordato, 

 I(Bvi, antice et postice angustato, postice lineold iransvema arcuatd. (Long, 

 corp, 5 lin.) 



