110 Mr. F. Du Cane Godman and Mr. Osbert Salvin’s 
also a specimen obtained by E. Bartlett on the Huallaga 
River, and others from Ecuador collected by Buckley at 
Cururai. In all ten specimens. 
Mechanitis sylvanoides, sp. 
Precedenti similis et marginibus externis alarum quoque albo 
punctatis ; posticis autem fascia mediana et margine externo nigris 
confluentibus, anticis area ad cellule finem flavo tincta. 
Hab. GUIANA. 
A Cayenne specimen sent us some years ago by Deyrolle 
belongs to this form, and two others of uncertain origin 
from the Kaden collection agree with it. 
The resemblance of this Mechanitis to Heliconius sylvana 
is great, the two insects being homceochromatic. 
Callithomia butes, sp. 
C. thornaci similis et forsan vix distinctas, alis anticis area apicali 
maculis flavis plerumque notata, posticis margine externo late nigro 
introrsum distincte dentato, fascia maculosa mediana magis distincta. 
Hab. Ecuapor, Rio Napo. 
We have fourteen specimens of a species of Callithomia 
which seems to be distinct from the single type of Bates’s 
C. thornax, inasmuch as the apical area of the primaries 
is always marked with large spots of either yellow or 
fulvous, the former predominating. 
Our series came from one collection made somewhere 
in the district of the Lower Napo, and they all have the 
prevalent fulvous tints peculiar to so many butterflies of 
that region; as is usual the amount of variation between 
individuals is considerable. 
Callithomia procne, sp. Nn. 
Alis anticis ad basin fulvis apicibus nigricantibus nigris fascia lata 
flava per cellule finem a costa ad angulum analem extendente, 
