of the Southern portions of South America. 4:7 



nalibus, et costa centrali in medio interrupta, angulis lateralibus 

 acutis et retrorsum spectantibus ; elytris cum costis duabus irre- 

 gularibus a basi ad partem apicalem tertiam longitudinaliter ductis, 

 costis duabus brevioribus basalibus, et cum lineis parvia punctisque 

 elevatis crebre dispositis : elytrorum carina laterali et apice non- 

 nunquam piceo-rubris, vel piceis. — Long. corp. lO^lin, ; lat. 5^ 

 liu. 



Black or pitcliy black, and glossy ; legs and antennre pitchy : 

 head rather coarsely punctm-ed and somewhat rugose in parts, 

 and with a transverse impression : thorax broader than long ; the 

 anterior angles produced ; the sides much dilated, but at a short 

 distance from the hinder margin, with a deep notch suddenly re- 

 ducing the width of the hinder part of the thorax nearly to that 

 of the fore part, and lea^ing to project in the form of an acute 

 angle (the point of which is directed backwards) the dilated la- 

 teral margin ; in this notch is a small triangular projection, which 

 may perhaps be regarded as the posterior angle of the thorax, if 

 we imagine that angle to be curved forwards and slightly upwards ; 

 the dorsal sm-face of the thorax is slightly convex, and has some 

 scattered punctures ; in the middle, behind, is a short and small 

 longitudinally elevated ridge, and on the disc are two other ridges 

 separated by a narroA^dsh interspace which presents numerous 

 small rugae ; on the fore-part of the thorax (which is emarginated) 

 there is a fourth little keel. The elytra incline to an ovate form, 

 and are considerably arched in the longitudinal direction ; in the 

 transverse direction the outline is but little arched : the lateral keel 

 is notched in parts, and extends nearly to the apex of the elytra, 

 sending out a small sub-apical brush : the surface is glossy and 

 uneven, and at about one-third of the distance from the lateral 

 keel to the sutm-e is a longitudinal ridge which extends the base 

 of the elytron, but is obliterated on the apical third ; within this 

 ridge are some irregular large shallow depressions and indistinct 

 ridges ; these depressions and minute ridges are confined to a space 

 which would be included between the longitudinal rib and a se- 

 cond rib ; but that second rib is obliterated, if we except a small 

 portion at the base of the elytron, and a short minute keel in a 

 line \^dth the point of termination of the outer and more developed 

 rib : the lateral margins of the elytra and the lateral keel are 

 pitchy red : the red coloui* of the lateral keel is continued to the 

 apical portion of the elytron, where it forms a broad and conspi- 

 cuous mark. 



This description is ch'awTi up from a specimen brought from 

 Mendoza by Mr. Dar\nn. 



Besides the species of Nyctelidie here noticed, the Marquis de 

 Breme^s collection contains a true Nyctelia (Solier) closely allied 

 to the Nyct. IVestwoodii of my paper : I propose to name it 



