Mr. T. V. Wollaston on a new genus of European Coleoptera. 337 



the narrowest), broader than the superior, and slightly concave at 

 the meeting of the two exposed sides. The inferior eye-plates are 

 wedge-shaped. Ossicles of inferior (?) surface of disk punctate. 

 Length of a side 1 J inch. 



This species is well distinguished from every other unmar- 

 gined form, except rectilineus, M'Coy, by its finely- granulated 

 superior marginals; and from that, to which it approaches 

 nearest, by the punctations on its inferior plates, and by its 

 wedge-shaped inferior oculars. About the size of uncatus. 



Chalk of Gravesend. 



Both specimens are in the Collection of the London Working 

 Men's College, Great Ormond Street. 



XXXIV. — On a new genus of European Coleoptera. 

 By T. Vernon Wollaston, M.A., F.L.S. 



Fam. Melyridse. 



Genus Antidipnis. 



Corpus minutum, ovatum, in utroque sexu (nisi fallor) apterum : 

 capite antice angustato, clypeo brevi membranaceo ; oculis promi- 

 nentibus. Antennce longe ante oculos insertee, filiformes, distincte 

 1 1-articulatse ; articulo l m0 reliquis longiore, paulo robustiore, leviter 

 subclavato ; 2 do brevi ; inde ad decimum longitudine subaequalibus ; 

 ll m0 ovato. Labrum transversum, antice truncatum, apicem versus 

 membranaceum. Mandibulce triangulares, cornese, basi latae, apice 

 incurvse acutse, necnon (in una saltern) fissae. Maxillce bilobse ; 

 lobis membranaceis, apice obtusis pubescentibus. Palpi maxillares 

 in sexu masculo valde diversi quam in fcemineo : in maribus longissimi 

 (fere articulum antennarum septimum attingentes), articulo l m0 mi- 

 nuto, 2 do huic paulo crassiore elongato, 3 ti0 4 to que maximis valde 

 incrassatis (illo ovato apice truncato, superne intra apicem externum 

 eroso, hoc insequali subquadrato, ad apicem ipsum spongioso) ; in 

 fceminis multo breviores (haud ultra articulum antennarum tertium 

 extendentes), articulo l mo minuto, 2 do 3 tio que huic paulo crassioribus 

 (hoc illo vix breviore), 4 t0 elongato (2 di 3 tH que conjunctim longitu- 

 dine sequali), leviter crassiore, fusiformi. Palpi labiates in utroque 

 sexu fusiformes ; articulo l m0 parvo, 2 d0 longiore crassiore, subclavato 

 apice truncato, ultimo huic longitudine subaequali sed paulo tenuiore, 

 fusiformi basi truncato. Ligula a me vix distincte observata. Pedes 

 longiusculi, graciles, valde cursorii : tibiis ecalcaratis, j)osticis basi 

 leviter subcurvatis : tarsis elongatis filiformibus, articulo l mo longi- 

 usculo, anticis in sexu masculo 4-articulatis : unguiculis simplicibus. 



Ab dvTi pro, et de'nrvoy coma (sc. ccense loco). 



The curious little beetle from which the above generic characters 

 have been compiled was captured by myself, near Lisbon, on the 

 17th of last July, in stercore arido humano (a somewhat remark-, 

 able habitat for a Malachian, and one I suppose which it must 



