158 MANDIBULATA. — COLEOPTEHA. 



f 5-articulato ; articulo 8-vo minuto : 110. Leiodes. 



pntegro 111. Agathidium. 



f haud sub thoracis 3-articulato; f JJ^Jb pStimoJ 

 J occultatum : articulo I r j 



J Antennarum\ ultimo \ j_ bifido . ^ Tritoma . 



capitulo\ acuto: fremoto: . 108. Phalacrus. 



[^Antennarum j 



I 



^appropinquante: 109. Ephistemus. 



2-articulato: natissimum : . .112. Cl ambus. 



Caput < 



| ( minutum, angustum : . 1!4. Orthoperus. 



t. sub thoracis clypeum omnind ( subrotundata : . . 115. Clypeaster. 



occultatum : Elytra apice < 



(truncata: . . . 113. Sericoderus. 



Genus CVII. — Tritoma, Fabricius. 



Maxillary palpi with the last joint large, transverse, compressed, lunate; labial 

 subclavate : maxilla with a minute tooth at the apex. Antennae short, mo- 

 niliform, with an ovate perfoliated three-jointed club; head subtriangular : 

 thorax elevated in the middle behind : body gibbous : elytra ovate, attenuated 

 behind, convex : legs moderate ; tibia? compressed, broad, elongate-triangular, 

 not spinose ; tarsi four-jointed, the penultimate joint bifid. 



The short, ovate, 3-jointed, obtuse club of the antennse, slightly 

 gibbous body, and lunate terminal joint of the palpi, distinguish 

 this genus from Phalacrus and Ephistemus, with which it agrees 

 in having the penultimate joint of the tarsi bifid : and by this last 

 character it is known from all the other genera in this family, with 

 which however it ill associates. One species only inhabits Britain : 

 its larva is not known to me. 



Sp. 1. bipustulatum. Nigrum, nitidum, elytris, maculd laterali baseos angu- 



latd coccined, pedibus nigris, tar sis rubris. (Long. corp. If — 2^ lin.) 

 Tr. bipustulatum. Fabricius. — Samouelle, pi. *2.f. 9. Steph. Catal. p. 66.JVo. 694 



Size variable : black, shining : head deeply punctate ; mouth piceous : thorax 

 slightly narrowed anteriorly, the sides margined, posteriorly dilated in the 

 middle, the disc punctured : elytra very glossy-black, faintly punctate-striated, 

 the interstices punctulated, each with a large quadrate bright red spot on the 

 outer basal angle, frequently marked with a dusky spot on the shoulder : body 

 beneath glossy-black, punctate: legs black: tarsi rufous: antennae rufous, 

 with the club dusky or black. 



This pretty insect is occasionally taken in May and June in 

 Coombe and Darenth woods : — I have also found it at the former 

 place, and at the roots of oaks in Richmond-park, during the 

 winter. 



Genus CVIII. — Phalacrus, Paykul. 

 Palpi filiform ; maxillary with the terminal joint elongate ; labial very short : 



