376 .T. Bourgeois. 



M. C.-O. Waterhouse a désigné ceUe coupe générique dans la collection 

 du British Muséum. 



Thonaluius, gen. nov. 



Cantharis Lin. (1763). — Lcimpyris Lin. (1767). — Pyrochroa Fabr. 

 {m 5-11 87 ).— Ly eus Fabr. (1801), Oliv., Dà\m. — Calopteron Caist , 

 .Tacq. Duval, Chevrolat. — Charactus Dej., Cat., S*" éd. —C.-O. Waterb., 

 Trans. ent. Soc, 1878, I, p. 98, gen. 9. 



Caput pronoto obteclum, brcviter vcl haud rostratum ; oculis promi- 

 nentîbus. 



Frons inter ociilos prominula. 



Labrum sat magnum, iransversum, antice rotundatum. 



Palpt maœiUares articulo idtimo apice oblique curvatimquc truncato, 

 subsccuriformi. 



Antennœ elongatœ, graciles, compressée, frontis prominulse insertse, 

 basi contiguse, articulo 1° crasso, pyriformi, 2° brevissimo, transverso, 

 3° triangulariter elongato, sequentibus breviore. 



Pronotum lateraliter foiiaceum et rcfleœum, undique meirginatiiin, disco 

 carina antica instructo posticeque longiludinaliter cemcdicuUdo. 



Prosternum brève. 



Spiracula thoracis haud prominenlia. 



Scutellum obtriangulare vel subquadratum. 



Elytra elongata, apicem versus paulum dilatata vcl subparalella, in 

 utrocjue sexu similia, o-coslata, costa submarginedi ad liumerum elevata, 

 intervallis punctato-rugosis , plerumque postice irregularitcr rciiculaiis, 



Coxœ intermediœ distantes. 



Pedes elongati, graciles, tarsis validiusculis, articulis 1-2 obconicîs, 

 3-Zi obcordatis, bilobatis, ultimo tenui, elongato. 



Unguli simplices. 



Abdomen foiiaceum, in d* segmentis ventralibus 8, ultimo triangula- 

 riter elongato, bivalvato, in $ scptem, uitimo ogivali vel triangulari. 



Corpus rubrum, elytris postice viridi-cœndeo vel violaceo-micantibus ; 

 pedilms plus minusve infusccdis. 



Ce genre semble former le passage des Lycus aux Calopteron. 



