182 MANDIBULATA. — COLEOPTERA. 



Glossy, smooth, black: thorax short, suborbiculate, slightly emarginatein front, 

 its lateral and posterior margins rufo-testaceous, the latter concealing the 

 scutellum : elytra very convex, rather acuminated behind, deep black, im- 

 punctate, with a faint stria near the suture posteriorly : body black beneath ; 

 legs rufo-testaceous: antennae the same, with the club dusky: mandibles 

 pitchy, the left one large and prominent. 



The large horn-like left mandible at once characterizes this species. 



I possess a single example of this remarkable species, taken near 

 London. 



Sp. 8. nigrinum. Nigro-piceum, lave, nitidum, subtus thoracis lateribus pe~ 



dibusque rufo-fuscis. (Long. corp. 1 lin.) 

 Agathidium nigrinum. Sturm. — Steph. Catal. p. 70. JVo. 756. 

 Pitchy-black, smooth, glossy: with the sides of the thorax and its hinder margin, 



the body beneath, and the legs rufous-brown ; the antennas pale, with a dusky 



fascia; the apical joint being coloured as the base : the scutellum minute. 

 The pale underside of this insect, with the smallness of its scutellum, the banded 



antennae and smooth elytra, serve to distinguish this species. 



Frequently taken in the metropolitan district. 



Sp. 9. affine. Atrum nitidum, thoracis lateribus marginibusque elytrorum ad 



apicem, antennis pedibusque rufo-testaceis. (Long. corp. £ — 1 lin.) 

 Dermestes affinis. Mar sham. — Ag. affine. Steph. Catal. p. 70. No. 757. 



Black, very glossy, impunctate, with the sides of the thorax, and of the elytra 

 towards the apex, pale rufo-testaceous ; the antennae and legs deep rufo-tes- 

 taceous ; the latter with pitchy femora. 



The pale rufo-testaceous margins of the thorax and elytra at once point out this 

 from its congeners ; and the piceous femora offer a strong point of dissimilarity 

 to the following. 



I obtained my specimens from the Marshamian cabinet by the 

 above name. 



Sp. 10. carbonarium. Atrum, nitidum, antennis Jemoribusque pallidis, elytris 



punctulatis stria suturali unicd. (Long. corp. £ lin.) 

 Ag, carbonarium. Sturm? — Steph. Catal. p. 70. A T o. 758. 



Shining black; thorax impunctate, with the margin concolorous : elytra convex, 

 deep black, finely punctulate, with an abbreviated stria on each near the 

 suture : body pitchy-black beneath ; femora pale testaceous ; tibiae and tarsi 

 pitchy : antennae pale testaceous. 



The pale antennae and femora, and deep black upper surface, distinguish this 

 species. 



One of my specimens was taken near London ; the other I ob- 

 tained from the Marshamian cabinet. 



