a heel 
119 
the apex of the elytra; these lines are observable in the grooves be- 
tween the costz: in one specimen there are three of the white lines 
on each elytron, corresponding with the number of interspaces of 
the cost ; 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. 
Eprreponora BonariEnsis. Epip. atra, nitida; thorace supra irre- 
gulariter et longitudinaliter multiplicato, ad latera crenato ; ely- 
tris utringue costis duabus elevatis, et sulcis transversalibus ordine 
triplict. 
Long. corp. 11} lin.; lat. 52 lin.; vel, long. 92 lin.; lat. 5 lin. 
Hab. Monte Video and Bahia Blanca. 
The species nearly resembles the H. ebenina, but differs in being 
larger and proportionately broader ; as in H. ebenina, each elytron 
has two longitudinal elevated cost besides the lateral keel; but the 
interspaces of all the costa, are indented with transverse furrows, 
whereas in J. ebenina only the two outermost interspaces have these 
furrows, and here they are much less strongly marked. The lateral 
keel in #. ebenina presents a nearly even line, but in #. Bonariensis 
the keel is distinctly indented ; the sulci on the thorax are less 
strongly marked and more numerous. 
Seven specimens of this species occur in Mr. Darwin’s collec- 
tion. 
Errpeponota tata. LEpip.atra, nitida, lata ; capite punctis disper- 
sis antice, apud medium sulco transverso, et postice sulcis paucis 
obliquis ; thorace sulcis, his obliquis, illis apud medium longitudi- 
nalibus, illis margini proximis transversis, insculpto ; elytris con- 
vexis costis latis pauld elevatis posticé subobliteratis, spatio inter 
costam secundam et carinam externam, sulcis profundis transversis 
notato. 
Long. corp. 93 lin. ; lat. 6 lin.; vel, long. 82 lin. ; lat. 5 lin. 
Hab. Port Desire. 
This species is larger and proportionally much broader than LZ. 
ebenina. ‘The thorax, in proportion to the size of the insect, is much 
broader than in any other species of Hpipedonota here described, the 
width being nearly equal to two-thirds of the length of the elytra; 
whereas in Z. affinis, which I have described as a shorter and broader 
species than EZ. ebenina, the width of the thorax is scarcely more than 
equal to half the length of the elytra. 
The head is punctured in front and has some waved transverse 
grooves and ridges between the eyes. The thorax is about twice as 
broad as long, emarginated in front nearly in the form of a segment of 
a circle ; the lateral margins are rounded; it is widest a little behind 
the middle and narrowest in front ; the anterior and posterior angles 
are acute ; the upper surface is nearly flat, but the lateral margins are 
slightly reflected ; the anterior mesial portion is a little convex, and 
