COPTOCYCLA. 183 
Coptocycla, after the exclusion of the species with pectinate claws, still includes many 
heterogeneous forms, some of which will have to be separated eventually. It is one of 
the most characteristic genera of Coleoptera in Tropical America, and includes a very 
large number of species, many of which are brilliantly metallic in life. Seventy-nine 
representatives are here recorded from within our limits, as against six from the United 
States, the species becoming more numerous southwards, where some of them may be 
said to swarm. The genus is very widely distributed, but has its headquarters in 
Tropical America. 
The metamorphoses of two of the Mexican species, C. opulenta and C. bifossulata 
(dubitabilis), Boh., have been fully described and figured by Dr. E. Dugés (Ann. Soc. Ent. 
Belg. 1887, pp. 143-146, t. 2. figg. 1-13). 
The annexed Table is added to assist in the identification of the Central-American 
species :— 
Claws simple. 
Antennz with the third joint elongate, almost or quite twice as long as the 
second (still longer in species 4 and 5). 
Elytra very feebly emarginate at the base; the humeri not prominent ; 
antennz comparatively short and stout. Species large, resembling 
Physonotain shape . . ..... - woe ew ee ee) 6+) 6 Species 1-8. 
Elytra more or less deeply sinuate-emarginate at the base. 
Humeri moderately prominent. 
Elytra gibbous, the margins translucent ; antennz elongate. Species 
large (= Psalidonota, Boh.) . . . . « ss + + + + + Species 4-7. 
Elytra convex (somewhat gibbous in C. orbiculata). 
The margins entirely translucent . . . . . . + + + + + + Species 8-18. 
The margins with two transverse dark fascie . . . . . + - . Species 19-21. 
The margins with a transverse dark fascia at the base only . . . Species 22-25. 
Humeri very prominent (still more so in 3). 
Elytra gibbous ; margins with a transverse dark fascia at the base. . Species 26. 
Elytra convex; margins entirely translucent . . . . . . « Species 27. 
Antenne with the third joint not or very little longer than the second. 
Elytra very feebly emarginate at the base; the humeri not prominent ; the 
margins very broadly expanded to the apex, entirely translucent . .« Species 28. 
Elytra more or less deeply sinuate-emarginate at the base (more feebly in 
species 41-43) ; the margins narrowing posteriorly. 
Antenne comparatively stout; elytral margins translucent . . . . . Species 29. 
Antenne slender. 
Elytra gibbous, very obtuse behind ; the margins with two broad curved 
dark fasciz, partly enclosing an oblong translucent space . . . Species 30. 
Elytra convex. 
The margins entirely translucent ; punctuation of disc fine or 
moderately fine . . . 2 2 6 2 6 © © # ee ee Species 31-40. 
Zaa 2 
