ACROPTERON. 255 
4. Acropteron agriloides. (Tab. XI. fig. 13, 3.) 
Acropteron agriloides, Makl. Act. Fenn. vii. p. 121°. 
Hab. Mexico}, Cordova, Juquila (Sallé), Misantla (Hége); Guatemata, Zapote, 
Senahu, Panzos (Champion). 
In this species the thorax is closely, comparatively coarsely, and subequally punctured, 
the disc sometimes slightly flattened or shallowly impressed behind, the anterior angles 
broad, rounded, and not much produced; the elytra with rows of comparatively coarse 
impressions, the terminal spines short; the tibie more or less roughened and punc- 
tured, the posterior pair in the male shallowly emarginate on the inner side some 
distance before the apex. In the long series of Mexican specimens before me the 
thorax is more rounded at the sides in some examples than in others; a single male 
from Panzos has the thorax broader (especially anteriorly), and smoother tibiz ; three 
females from Senahu, however, agree well with those from Mexico. 
5. Acropteron angulicolle. 
Closely resembling A. agriloides, and only differing as follows :—The prothorax with more prominent angles, 
the anterior ones narrowly, subangularly extended (not broad and rounded), the posterior ones more 
acutely produced, the disc not flattened behind ; the posterior tibise in the male abruptly and deeply arcuate 
emarginate (thus forming a triangular tooth) on the inner side some distance before the apex. 
Length 10 millim. (¢.) 
Hab. Nicaragua, Chontales (Belt). 
One male example. This insect cannot be treated as a variety of A. agriloides, 
differing as it does in the shape of the anterior angles of the thorax and the more 
pronounced male characters. 
6. Acropteron calcaratum. (Tab. XI. fig. 14, 3.) 
Brownish-bronze, shining. Head coarsely and subconfluently punctured, moderately deeply excavate in front, 
a distinct longitudinal fovea on the vertex; antennzx piceous; prothorax transverse, the anterior angles 
produced and rather broadly rounded, the posterior angles acute and outwardly directed, the base feebly 
emarginate before the scutellum, the basal fovew short but deep, the disc broadly transversely impressed 
before the base, the surface coarsely and closely punctured, a longitudinal space on the disc impunctate ; 
elytra scarcely narrowing to some distance beyond the middle, rather wide, with rows of moderately coarse 
rather shallow punctures, the terminal spines narrowly, obliquely, and acutely produced; legs rather 
smooth, not very closely punctured, brownish-bronze, the basal two thirds of the tibis and the first joint of . 
the posterior tarsi more or less red; posterior tibie with a short broad triangular tooth followed by a 
rounded concave emargination on the inner side beyond the middle, and the four hinder femora strongly 
fringed with short hairs beneath, in the male. 
Length 11-113 millim. (¢ @.) 
Hab. Guatmmaua, San Gerdénimo (Champion). 
Four examples. This species will be separated from its allies by the thorax being 
broadly transversely impressed in the middle behind, the surface coarsely punctured, a 
longitudinal space on the disc impunctate; the elytra comparatively shallowly punc- 
tured; the posterior tibie armed with a short, broad, triangular tooth. 
