CALOPTERON.—CANIA. 17 
Section B ii. Thorax with the carina divided at the base; elytra moderately widened, 
with three raised lines. 
27. Calopteron tricostatum. (Tab. II. fig. 6, 2.) 
Nigrum, prothoracis lateribus elytrorumque dimidio basali ferrugineis ; elytris lineis tribus elevatis, intervallis. 
irregulariter areolatis. Long. 6-10 millim. ¢ Q. 
Mas minor, segmento penultimo exciso. 
Femina major, segmento apicali medio minute diviso. 
Hab. Mexico, Toxpam (Sallé) ; GuaTeMaLa, Pancina (Champion). 
The disparity in size between the sexes is not so great asin C. matutinum or C. difficile. 
The thorax is more evenly rounded in front; and the hind angles are rather more 
acutely produced. ‘The carina is divided and open at the base, as in the preceding 
species. 
This species also resembles C. xanthomelas, Kirsch. The divided carina of the 
thorax, and the antenne not pectinate in either sex, will enable them to be easily 
separated. 
C/AENIA. 
Cenia, Newman, Ent. Mag. v. p. 381 (1838). 
The species given in the Munich Catalogue as belonging to this genus, from Mada- 
gascar, Ceylon, and Mamuku, do not agree in typical characters; and I do not consider 
that the genus is found out of the North-American Region. It is best characterized by 
the expanded oval elytra with three strongly raised and six subsidiary nervures, the 
deeply indented sides of the thorax, and its complete simple carina. ‘There are known 
at present four species in Central America. 
1. Cenia cardinalis. (Tab. I. fig. 24,9.) 
Nigra, prothorace elytrisque sanguineis, his lineis tribus sat fortiter elevatis, ad apicem conjunctis, et sex alteris 
haud distinctis ; illo carinato, disco infuscato, lateribus fortiter bisinuatis ; antennis flabellato-pectinatis. 
Long. 15 millim, 
Hab. Costa Rica, Volcan de Irazu (Rogers). 
The whole of the body, with the antenne, palpi, and legs, is black; the thorax is 
orange-red, with the centre infuscate; the carina is complete, dark in the middle. 
The elytra are vermilion, with the base of the suture very narrowly black. Three lines 
are strongly marked—one subsutural, one discoidal, and the humeral one; these unite 
near the apex; six finer lines are present, one in each interstice, excepting that three 
intervene between the discoidal and the humeral nervure ; of these three the middle one 
appears to represent the ordinary third raised line where four are found; it is rather 
stronger than those on each side of it, and is much raised at the base. The transverse 
lines are remarkably regular, and divide the area into nearly square meshes; they 
BIOL. CENT.-AMER., Coleopt., Vol. III., Pt. 2, December 1880. D 
