MALACODERMATA. 245 
Several specimens of both sexes were found; all, however, have the thorax with a 
more or less distinct black vitta, sometimes the base of the suture, and in one case two 
linear dots before the middle of the elytra, blackish. The Guatemalan specimens from 
San Gerdnimo and Zapote, alluded to under this species, do not pertain to it, but to 
Plateros stramineus. It as, therefore, as yet, only occurred in Nicaragua and 
in the State of Panama. 
1 (4). Calocladon chiriquense. 
Subparallelum, nigrum; prothorace elytrisque sordide flavis, his in medio paululum contractis, costis duabus 
elevatioribus, sutura ad basin nigricante, illo vitta mediana nec apicem nec basin attingente nigra; pedibus 
basi, antennarumque apice interdum flavescentibus. Long. 6-63 millim. dg Q. 
Mas. Antennis flabellato-ramosis, ramis quam articuli plus duplo longioribus; oculis subglobosis valde 
prominulis. 
Femina. Antennis compressis, acute serratis. 
Hab. Panama, Volcan de Chiriqui, Bugaba (Champion). 
Calocladon fusculum (p. 29). 
This must be removed from the genus Calocladon, and is identical with the species 
which forms the type of a new genus Zeroplas. The structure of the thorax is much 
more nearly that of Plateros, but the eyes are as in Calocladon. The antenne are 
ramose, but the branches are fine, not flabellate as in this genus. The description 
given is correct, but the unique type was unsatisfactory, being apparently immature. I 
have redescribed it under Teroplas from another example. 
2, (a). Calocladon histrionicum. 
Niger; prothoracis lateribus humerisque flavis, prothorace antice carinato, in medio concinne ac distincte 
canaliculato, basi in medio prominulo haud alte elevato. Long. 7 millim. ¢ Q. 
Mas. Oculis sat prominulis, antennis flabellato-ramosis, ramis quam articuli triplo fere longioribus. 
Femina. Antennis latis acute serratis. 
Hab. Guaremata, Cerro Zunil, El Tumbador, Purula (Champion). 
Var. Plaga humerali longius provecta. 
Hab. Mexico, Cordova, Playa Vicente, Tuxtla (Sallé col/.); GuatemaLa, Sinanja, 
Sabo, Purula (Champion). 
This insect is nearly allied to C. oculatwm, and females from Cordova seem to exhibit 
no other difference than that of colour, the form of the thorax and its channel being 
precisely similar. It is, however, the shoulders only of the elytra which are yellow, and 
-in these specimens the species afford another almost exact resemblance to Calopteron 
mimicum, to which we have now quite a group of similarly coloured species. But the 
males are narrower than those of C. oculatwm, the antennz have the apical joint always 
black, and in the typical specimens from Cerro Zunil the elytra are nearly wholly 
black. 
