Zoological Society* 145 



The head presents some scattered punctures in front, and, gene- 

 rally, there are some waved transverse impressions towards the hinder 

 part, leaving narrow ridges between them. The thorax is twice as 

 broad as long, has the sides distinctly rounded, the fore-part emar- 

 ginated in the form of a segment of a circle ; the anterior angles are 

 acute, and there is a small indentation in the outer margin close to 

 the angle ; the posterior margin is nearly straight in the middle, but 

 the angles are produced : the upper part of the thorax presents a 

 slightly concave surface, and is covered with small sulci ; those in the 

 middle are oblique, converging to or towards the hinder part of the 

 mesial line ; about midway between this line and the outer margin 

 they become longitudinal in their direction, and a space bordering the 

 lateral margin is covered with oblique but nearly transverse narrow 

 grooves and ridges. The width of the elytra, compared with that 

 of the thorax, is nearly as seven to five, and the elytra are about 

 one-fourth longer than broad, or rather less ; the dorsal surface is 

 plane and almost destitute of sculpturing; on the sides are two 

 series of transverse furrows, which are separated by a strong costal 

 ridge ; the innermost of these two series of transverse grooves is ob- 

 literated towards the base and apex of the elytron, but in the middle 

 they are strongly marked, as are also the transverse grooves between 

 the costal ridge and the lateral keel : on the apical half of each elytron 

 a faint trace of the costa, corresponding to the innermost one in E. 

 ebenina, is observable. 



Numerous specimens of this new species were contained in Mr. 

 Bridges's collection. 



Epipedonota ebenina, Solier. Nyctelia ebenina, Auct. 



Four specimens of this species were brought by Mr. Darwin from 

 Mendoza ; two of these are females, and present a character I have 

 not before observed in the species, viz. some zigzag white lines at 

 the apex of the elytra ; these lines are observable in the grooves be- 

 tween the costse : in one specimen there are three of the white lines 

 on each elytron, corresponding with the number of interspaces of 

 the costse ; they are interrupted, and form dots as they recede from 

 the apex of the elytron. In the other specimen there are but two of 

 these lines visible. 



Epipedonota erythropus, Solier. Nyctelia erythropus, Auct. 



Mr. Darwin also found this species (if it be really distinct from 

 ebenina) at Mendoza. 



Epipedonota Bonariensis. Epip. atra, nitida ; thorace supra) irre- 



gulariter et longitudinaliter multiplicato, ad latera crenato ; ely- 



tris utrinque costis duabus elevatis, et sulcis transversalibus ordine 



triplici. 



Long. corp. 11 \ lin. ; lat. 5| lin. ; vel, long. 9f lin. ; lat. 5 lin. 



Hab. Monte Video and Bahia Blanca. 



The species nearly resembles the E. ebenina, but differs in being 

 larger and proportionately broader ; as in E. ebenina, each elytron 

 has two longitudinal elevated costse besides the lateral keel ; but the 

 interspaces of all the costae are indented with transverse furrows, 

 whereas in E. ebenina only the two outermost interspaces have these 

 Ann. § Mag. N. Hist. Vol. x. L 



