ANISOTOMID^. — CLAMBUS. 183 



Sp. 11. minutum. Obovatum, nigrum, nitidissimum, lave, thoracis limbo laterali 

 rufo-testaceo, elytris postice acuminatis, disco rufo-piceis. (Long, corp 

 llin.) 



Ag. minutum. Sturm. — Steph. Catal. p. 70. No. 760. 



Minute: obovate, very glossy-black, smooth : head broad convex ; mouth piceous : 

 thorax very convex, with the sides deflexed, and broadly ferruginous, the 

 hinder margin narrowly bordered with the same colour : elytra ample, rather 

 narrowed behind, black, the disc pitchy-red ; very smooth, without an ab- 

 breviated sutural stria: legs pitchy-black; tarsi testaceous. 



The red patch on the disc of the elytra at once serves to distinguish this species 

 from its congeners. 



Found near London, and in " Norfolk." — Dr. Leach. 



Sp. 12. nanum. Suborbiculatum, nigrum, nitidissimum, thoracis limbo laterali 

 anguste testaceo, elytris postice obtusis, stria suturali nulla. (Long. corp. 

 i Hn.) 



Ag. nanum. Megerle?— Steph. Catal. p. 70. No. 761. 



Very minute : head broad, convex, smooth : thorax very convex, the sides con- 

 siderably deflexed and narrowly edged with testaceous : elytra ample, obtuse 

 posteriorly, very smooth, glossy, without a sutural stria, deep black, the apex 

 sometimes piceous : body and legs black, the legs a little paler. 



The smaller size and greater obtuseness of the elytra, with the black disc of the 

 latter, sufficiently point out the distinction of this species. 



Not uncommon in sand and gravel pits in the metropolitan dis- 

 trict. " Edinburgh : Dartmoor, in March." — Dr. Leach. 



Genus CXII. — Clambus, Fischer. 



Trophi minute. Antenna? as long as the thorax, slender, pilose, the two last 

 joints large, oblong, forming a club : head large, nearly or quite as broad as 

 the thorax, rounded anteriorly : thorax transverse, the lateral margins more 

 or less attenuated: elytra very convex, and gibbous anteriorly, attenuated, 

 and declining posteriorly, the apex rounded: body contractile into a ball: 

 legs short : tibia slender, slightly pilose : tarsi obscurely articulated. 



Like Agathidium the species of this genus have the power of 

 contracting themselves into a ball when alarmed. From the genus 

 just mentioned they may be known by the great width and bulk of 

 the head, and by the club of the antennse being composed of two 

 joints only, a structure which also obtains in the genus Orthoperus : 

 but in that genus the head is small, the elytra but slightly gibbous, 

 and somewhat truncate posteriorly. As in the kindred genera, the 



