the Coleopterous Family Erotylidce. (87) 463 



appHcato, prosterno triangulariter elevato, postice emarginato, 

 antice sub-acuto, immarginato ; epipleiuns punctatis, pro antennis 

 concavis ; capite utriiique punctato, mentum sub-elongatum, rotun- 

 datum. 



Triplax. • 



Herlst, Kdf. v. 146—1793 {typ. russica, L.). 



The European and Nortb American species are typical, those 

 from Madagascar and Brazil are not so, and will doubtless require 

 the establishment of at least two new generic divisions for their 

 reception ; paucity of material, however, precludes me from inves- 

 tigating them satisfactorily at present. 



Triplax melanocephaia. 



Tritoma melanocephala, Latr. Hist. Nat. xii. 39 (1804). 

 Triplax nigriceps, Lac. Erot. 213. 



melanocephala, Bed. Abeille, v. 23. 



, Crotch, Entom. v. 7. 



Germany (Lacordaire), France, Spain, Italy, Algeria. 

 Distinct by the antennae, of which joints 2 — 8 are short, equal, 

 moniliform. 



Triplax Marseuli. 



Triplax Marseuli, Bed. Abeille, v. 24. 



S. France, Algeria. 



Differs from T. melanocephala by the antennae, which have the 

 3rd joint sub-elongate, and from T. cyanescens by the black elytra 

 and the flat scutellum. 



Triplax cyanescens. 



Triplax cyanescens. Bed. Abeille, v. 26. 

 ■ melanocejihala ||, Lac. Erot. 211 [nee Latr.). 



Spain, Portugal, Algeria. 



Distinct by the blue tint, and the punctures in the striae of the 

 elytra. 



Triplax senea. 



Silpha cenea, Schall. Act. Hall. i. 254 (1783). 



Triplax — , Lac. Erot. 212. 



, Bed. Abeille, v. 27. 



, Crotch, Entom. v. 7. 



Europe generally, commoner towards the north, Caucasus, 

 E. Siberia. 



T. bicolor, Marsh., is not a black variety, but merely a specimen 

 discoloured by grease and dirt. 



