CALOPTERON. 15 
21. Calopteron ichnoides. (Tab. II. fig. 21, 3.) 
Nigrum, prothoracis lateribus maculaque humerali late flavis; elytris postice paullo dilatatis, lineis quatuor, 
secunda et quarta elevatis, intervallis irregulariter reticulatis ; antennis acute serratis, fere pectinatis. ¢ 9. 
Long. 73-11 millim. 
Mas elytris postice modice ampliatis, antennis subpectinatis. 
Femina elytris subparallelis, antennis acute serratis. 
Hab. Guatemata, Capetillo, Duefias, Purula (Champion). 
This and the following species closely resemble each other ; and their determination 
can scarcely be effected unless both are studied together. They have a considerable 
likeness to Ichnea mexicana, a species of Cleride. 
The figure represents a Capetillo specimen. 
92. Calopteron mimicum. (Tab. II. fig. 22.) 
Nigrum, prothoracis lateribus angustius strigaque humerali in callo per costam paululum provecta flavis ; 
elytris subparallelis, lineis quatuor, secunda et quarta magis elevatis, intervallis reticulatis, areolis sub- 
quadratis; antennis serratis, articulis tertio usque ad decimum angulis internis subrectis. Long. 
7-9 millim. 
Mas minor et angustior, antennis articulis interne subacutis. 
Hab. GuateMaLa, Capetillo, Duefas, Senahu (Champion). 
When this species is compared with C. ichnoides, it will be seen to be more parallel ; 
and the humeral striga is narrower, but continued further along the humeral costa. 
The most important difference is in the antennex of the males. In C. mimicum the fourth 
to the tenth joints are serrate, their apical internal angles are nearly right angles; in 
C. ichnoides they are produced into an acute flat “ramus,” which is longer than the 
joint itself. It appears to be a commoner species. 
Our figure represents an example from Capetillo. 
Section B. Thorax with the carina divided behind ; elytra moderately widened, with 
four raised lines, areolets irregular. 
23. Calopteron beltii. (Tab. IT. fig. 19, 2 .) 
Nigrum, pectore, pedibus basi, prothorace elytrisque rufo-testaceis, his macula magna subrotundata paulo 
post medium, illo carina postice canaliculata et vitta mediana nigris. ¢ 9. Long. 10-15 millim. 
Hab. Nicaracua, Chontales (Bel?). 
The species of this section of Calopteron are easily recognized by their rather soft, 
somewhat convex elytra, with four nervures, two or three of which are more strongly 
raised, with irregular areolets, and by the divided carina of the thorax, which thus has 
a narrow channel in its basal half, which is sometimes open at the base, at others 
closed. 
Several species thus characterized have been described from Colombia and New 
Granada. C. beltit is subelongate, rather less so in the male; the thorax is narrowed 
in front, the sides scarcely sinuate, the hind angles acute. The elytra are sometimes a 
