of the Southern portions of South America. 43 



term it gray with cupreous reflections. I will proceed to point out 

 the characters of the remaining species. 



N. serva, Lacord. 

 Nyct. (Mitragenius) ater; thorace subquadrato, antlce emarginato, 

 supra paulo convexo, plicis minutis longitudinalibus notato : elytris 

 oblongo-ovatis, supra convexis, singulorum supra costis duabus 

 parum elevatis absque costis intermediis tribus indistinctis. — Long. 

 Corp. 7| lin. ; lat. 3| lin. 



This species resembles the N. Dejeanii, but is of a narrower 

 and more elongated form. Although both Lacordaire^s specimens 

 are black, in one of them there are traces in parts of the cupreous 

 gray epidermis, which in Dejeanii covers the elytra. The head is 

 finely punctm-ed : thorax nearly quadrate, more than one-third 

 broader than long ; the anterior angles prominent and acute, the 

 posterior nearly right angles but slightly acute ; the sides nearly 

 straight, or but indistinctly rounded ; the surface slightly convex, 

 and covered with very fine longitudinal striae (still finer than in 

 N. Dejeanii) ; a space along the outer margin is very nearly 

 smooth. Elytra oblong-ovate, pointed behind, and with the sur- 

 face convex ; each elytron with tw^o longitudinal costse, narrow and 

 but little elevated, and besides there is a very indistinct ridge in 

 the interspaces. The costse are scarcely as distinct as in N. De- 

 jeanii. 



11. Nyct. multicosta, Guerin. Now a member of M. Solier's 

 genus Callyntra (see loc. cit.). Described by M. Guerin in his 

 ' Mag. de Zool.' 



12. Nyct. rustica, Dej., is very closely allied to the Epipe- 

 donota rugosa of my paper in the ^ Proceedings of the Zool. Soc' 

 quoted, and might even be an extreme variety. It differs in being 

 considerably smaller (length 7 lines, width 3| lin.), and has the 

 sculpturing more coarse ; the two costse of the elytra are much 

 stronger, and the very strong rugse on the elytra, though irre- 

 gular, are for the most part transverse, especially between the 

 outer longitudinal ridge and the lateral keel. The legs, antennse^ 

 tip of the labrum and palpi are red. 



13. Nyct. Jugletii, Buquet. This I have very little doubt is the 

 N. crenicosta of Guer. (see ' Mag. Zool.'), which belongs to M. 

 Solier's genus Auladera. 



16. Nyct. mamillonea, Lacord. Placed by Solier in his genus 

 Psectrascelis, and described by him in the paper before quoted. 



17. Nyct. discicollis, Lacord. Also belonging to M. Solier's 

 genus PsectrasceliSj and described by that author. 



18. Nyct. lavipennis, Dupont, is the Nyct. pilipes of Guerin, 



