CHALCOPHANA. 155 



Colaspis, with which they have their general shape in common. They are at once 

 distinguished from the last-named genus by the rounded, not dentate, lateral margin of 

 the thorax and the bilobed prosternum. A great many species seem very closely allied ; 

 and their determination, as is the case in the genus Noda and Colaspis, is not easy. 

 The females in Chalcophana are mostly provided with ribs or costse on the elytra, but 

 not invariably so ; and this is also sometimes the case in the male. Eriphyle, Baly, has 

 the antennae rather more dilated than usual, but has been included by Chapuis in the 

 present genus. Cychrea, however, is a true Chalcophana. 



The species of this genus are very numerous, and found in most parts of the New 

 World ; seven or eight species have been described from Central America, the rest 

 from the more southern parts of the continent. 



1. Chalcophana cincta. (Tab. VII. fig. 9.) 



Chalcophana cincta, Klug, Dej. Cat. 3rd ed. p. 431 l ; Harold, Coleopt. Hefte, xii. 1874, p. 76 2 . 

 Chalcophana klugi, Dej. Cat. 3 



Eab. Mexico 1 2 3 , Cordova, Tuxtla, Orizaba, Teapa, Yolos, La Parada, Jalapa (Salle, 

 Edge) ; Beitish Honduras, rivers Sarstoon, Hondo (Blaneaneaux) ; Guatemala, Capetillo, 

 Sabo, Sinanja, San Geronimo (Champion, Salvin); Costa Eica, Cache (Sogers). 



This is one of the common species which are generally received in great numbers 

 from Mexico. It may be known by its metallic green or bluish upper surface, and 

 by the transverse fulvous band of the elytra, which extends across the disk and to the 

 lateral margins ; this band is generally very narrow, but often varies in width ; but its 

 anterior margin is almost always straight, while the posterior one is oblique. The 

 male is usually smaller than the female; and the punctuation of the elytra is subject 

 to variation, some specimens showing a much stronger punctuation than others ; the 

 antennae have the last five or six joints black, the rest are fulvous. Several specimens 

 without the fulvous band, but differing in no other respect, were obtained at Sabo by 

 Mr. Champion. 



2. Chalcophana championi. 



Fulvous ; last eight or nine joints of the antennae black j elytra metallic green, rugose punctate-striate ; the 

 lateral margins and a .rhomboidal spot at the middle of the disk fulvous. 



Length 2|-3| lines. 



cJ . Head finely punctured, longitudinally impressed between the eyes ; antennae more than two thirds the 

 length of the body, slender, black, the first three joints fulvous ; thorax transverse, but little narrowed 

 in front, anterior angles produced into a distinct tooth, surface deeply but remotely punctured ; scutellum 

 fulvous ; elytra distinctly narrowed towards the apex, the latter acute, closely geminate punctate-striate 

 near the suture, rest of the surface more irregularly and more strongly punctured, the interstices trans- 

 versely rugose at the sides, with indications of short longitudinal costse at the shoulder and base; elytra 

 bright metallic green, with a rhomboidal or triangular spot at the middle of the disk, the lateral margins 

 and the apex fulvous ; apex of the tibiae and the tarsi generally, but not always, black. 



2 Larger and broader ; head strongly and closely punctured ; thorax covered with large and small punctures ; 



x2 



