42 Mr. G. R. Waterliouse : Contributions lo the Entomology 



thorace latinribus valde rugosis ; rugse plerumque transversae ; sin- 

 gulorum supra costis duabus elevatis. — Long. corp. 9^ lin. ; lat. 

 5 lin. 



Descrip. — Head punctured in front, with some strongly waved 

 transverse rugse on the disc, and behind with minute confluent 

 punctm'es. Thorax less than half as broad again as long, flat (or 

 rather slightly concave), covered nearly throughout with longi- 

 tudinal folds, the usual transverse rugse at the sides being very 

 short. Elytra covered with distinct rugse throughout ; each ely- 

 tron with two moderately elevated costse, the second or outermost 

 being the most distinct ; suture not elevated ; the rugse between 

 the suture and the fii'st rib or keel very irregular ; between the 

 first and second costse, and between the latter and the lateral 

 keel, they are transverse, and for the most part curved and waved ; 

 they are strongly marked, but less regular than the transverse 

 folds in Eji' ehenina. 



6. Nyct. monilis, Lacord. This is the species which I regarded 

 as a variety of Ej). ehenina, and noticed as such in my account of 

 the species of Nyctelida brought home by Mr. Darwin (see ' Pro- 

 ceedings of the Zool. Soc' for December 1841, p. ] 18). Lacor- 

 daire's specimens agree with Mr. Darwin's in having the white 

 zigzag lines on the elytra ; they are rather smaller than the ty- 

 pical ehenina, the transverse grooves between the costse on the 

 elytra are less strongly marked, and the tarsi are apparently more 

 slender. I am not however yet satisfied that it is a distinct species. 



7. Nyct. andicola, Lacord. This, with the N. crenicosta of 

 Guer., is grouped under the generic title of Auladera by M. Sober, 

 and is described in the ^Annales dc la Soc. Ent. de France,' 

 tome V. p. 834. 



8. Nyct. desertorum, Lacord. 



9. serva, Lacord. 



10. carahoides, Lacord. 



14. ])icta, Lacord. 



15. Dejeanii, Lacord. 



These belong to M. Solier's genus Mitragenius, of which the 

 type is the N. Dejeanii. I cannot follow M. Lacordaire in regard- 

 ing these species as all of them distinct. There appear to me to be 

 but three species at most. N. Dejeanii and N. serva are very 

 probably distinct, but N. desertorum, N. carahoides and N. jjicta 

 I think should certainly be grouped under one specific title. 



N. Dejeanii is described by M. Solier in the vol. of the French 

 .Society's Transactions already quoted. The colour of the epi- 

 dermis covering the elytra is very remarkable, and is described by 

 M. Solier as " d'un cuivre pale,-" terms which did not convey to 

 me the tint which I found upon seeing the specimens. I should 



