ESTHEMOPSIS. 487 
A single female specimen, sent us from Costa Rica by Mr. Rogers, is the only one 
we have seen of this peculiar species, which is quite distinct from all known to us. Its 
position in Esthemopsis is doubtful, as the subcostal nervure of the primaries has four 
branches instead of three, the normal number in the genus. 
There appears to be a strong basal nervure to the secondaries. 
The palpi in £. radiata seem more erect and hairy than in typical species of Esthe- 
mopsis ; but they are red, which is characteristic of the typical species. 
Our materials are wholly insufficient to determine the position of this insect satis- 
factorily. 
Esthemopsis (?) unicolor, sp. nov. (Tab. XLVI. fig. 6.) 
Alis omnino nigris, collare, palpis, et ano aurantio-rufescentibus, antennis nigris vix clavatis. 
Hab. GuateMata, Panima (Champion). 
We have but a single specimen of this species, a female, which we thought at one 
time might be placed temporarily in the genus Esthemopsis. But until we have 
additional examples, and are able to dissect them, its position cannot be satisfactorily 
ascertained. The chief difference from Esthemopsis which we detect at present lies in 
the neuration of the primaries, one branch of the subcostal being emitted ‘before the 
end of the cell instead of two. 
Mr. Champion captured a single example at Panima in the low hot valley of the 
river Sinanja, a tributary of the Polochic. 
