134 Zoological Society, 



angustiore'; angulis posticis productis, obtusis, supra ad medium 

 paulb convexo, et crebre punctato ; elytris latis, subovatis, convexis, 

 sulcis profundis transversalibus, a margine externo fere ad sutu- 

 ram duetts, plagd suturali profunde indentatd. 

 Long. corp. (<£) 13 lin. ; lat. 7| ; vel, long. ll£ lin., lat. 6£ lin. 

 Long. corp. (?) 12f lin., lat. 7^ lin. 

 Hab. Port Desire. 



This species is considerably larger than N. lavis ; the thorax is 

 proportionately broader and shorter, and the produced apical portion 

 of the elytra is dilated and depressed. The head is thickly punc- 

 tured in front, and there are numerous punctures at the sides above 

 and behind the eyes. The thorax is about twice as broad as long ; 

 the broadest part is behind, but till anterior to the middle it scarcely 

 decreases in width ; from the middle to the fore-part the transverse 

 diameter is gradually lessened, so that the lateral margins form a 

 gentle curve ; the anterior portion is emarginated, and the posterior 

 margin is rather strongly sinuated ; the anterior angles are acute, 

 and the posterior angles are rounded. The upper surface of the 

 thorax is convex in the middle, but towards the sides it is slightly 

 concave ; it is thickly punctured, and the punctures are many of 

 them confluent ; on the disc the punctures are much less numerous. 

 The elytra are about one-fourth broader than the thorax (rather less 

 in the male sex), and about one-fourth longer than broad; they are 

 very convex, indented at the suture, and furnished w r ith a series of 

 nearly transverse indentations, about eighteen or twenty in number, 

 which commence at the lateral keel and terminate about one-eighth 

 of an inch short of the suture ; the space between these transverse 

 folds and the suture is apparently smooth ; but with a moderately 

 strong lens some very minute tubercles may be observed scattered 

 on this part, as well as on the interspaces of the transverse indenta- 

 tions, which are about equal in width to the grooves : the apical 

 portion of the elytra is considerably produced, and the produced part 

 is broad and somewhat depressed, and has the upper surface rugose. 

 The mentum is coarsely punctured, and the under side of the head is 

 thickly punctured : the prosternum is coarsely punctured in the mid- 

 dle, and has some irregular rugae at the sides ; at the lateral margin 

 is a series of small transverse rugae : the mesosternum and metaster- 

 num have irregular rugae in the middle, and the two first and half of 

 the third abdominal segments have small irregular longitudinal rugae ; 

 the remaining two abdominal segments are finely punctured. 



Nyctelia Solieri. Nyct. ovata, nigra, nitida ; capite antice punc- 

 tato, postice Icevi ; thorace transverso, elytris angustiore ; angulis 

 posticis productis, supra apud medium paulb convexo, et Icevi ; ely- 

 tris antice apud plagam suturalem leviter impressis, et sulcis 

 transversis paulo irregularibus a margine later ali fere ad suturam 



Long. corp. 11} lin. ; lat. 6f lin. 

 Hab. Patagonia. 



This species resembles the N. plicata, but differs in having the 

 thorax smooth ; the elytra are rather narrower, and the apical pro- 



