14 MALACODERMATA. 
18. Calopteron obliquum. (Tab. II. fig. 13.) 
Ezxos obliquus, Say, Boston Journ. i. p. 154". 
Lineare, nigrum, prothoracis lateribus et elytrorum dimidio basali, sutura excepta, rufo-ferrugineis ; elytris 
lineis quatuor, secunda et quarta fortiter elevatis ; pedibus longis, trochanteribus pallidis. ¢ 9. 
Mas minor, magis linearis, segmento ventrali septimo angulariter exciso tantum distinctum. Long. 53-7 millim 
Femina major. Long. 9-10 millim. 
Hab. Merxico1, Cordova (Sallé), Jalapa (Hoge); Guatemata, San Gerénimo, San 
Juan, Senahu, Sabo, Cahabon, Balheu, Chiacam, Cubilguitz (Champion); Nicaraceua, 
Chontales (Janson). 
This seems to be a common species in Mexico and Vera Paz. The thorax is narrowed 
from the base to the front ; its sides are a little sinuate, and the hind angles very acute and 
produced. ‘The carina is entire, and is usually pale with the disk black on each side. 
The elytra have the second and fourth coste strongly raised; and the black of the 
apical portion extends, as usual, further up the intervals, the outer margin and the 
fourth costa being continued as yellow lines further than the second. The suture is 
black as far as the end of the first interval. 
A Sabo specimen is figured. 
19. Calopteron lineare. (Tab. II. fig. 14.) 
Lineare, nigrum, prothorace elytrisque rufo-testaceis; his 4-costatis, intervallis plus minusve nigrescentibus, 
regulariter clathrato-punctatis ; illo disco nigro, carinato carina flava ; pedibus longis, basi flavis ; antennis 
utroque sexu serratis. Long. 7-8 millim. 
Hab. GuatEMALA, Capetillo, Zapote (Champion) ; Costa Rica, Volcan de Irazu, alt. 
6000-7000 feet (Rogers). 
The extremely linear form, and evenly costate elytra, with square punctures regularly 
disposed in the interstices, and their disposition to be dark, leaving in some examples 
only the alternate costee pale, will cause this elegant insect to be recognized among its 
allies. The thorax is narrowed from the base to the front, which is round; the hind 
angles are acute, the basal margin bisinuate, with the middle very finely cut out where 
the carina ends; but this is not clearly visible in all examples. 
The figure is of a large specimen from Irazu. 
20. Calopteron terminale. 
Lineare, nigrum, prothorace elytrisque testaceis; illo disco fusco, carinato, lateribus fortiter bisinuatis; antennis 
serratis, articulo ultimo flavo; pedibus longis, basi flavis; elytris squamulis minutis vestitis, 4-costatis, 
costis secunda et quarta elevatis. Long. 54-73 millim. 
Hab. GuatTeMALA, San Juan (Champion); Nicaragua, Chontales (Janson). 
The smallest species of the genus I have yet seen, and very like C. dineare, but clearly 
distinct by the yellow terminal joint of the antenne, the indented, sinuate sides, and 
prominent front of the thorax (which has the carina entire and the base without the 
least appearance of a notch), and the entirely pale elytra. 
