552 MR. H. W 
7. Melinjea. Pardalis. 
Mechanitis Maelus (part), Hewitson, Exot. Butt. Mechanitis, fig. 9. 
Mr. Hewitson considered this form to be a variety of M. Maelus : both were very 
abundant at E<*a, and I did not find them to intermingle ; it will be better, therefore, to 
keep them apart. The two sexes are alike in colours, as in the vast majority of the Heli- 
conidce. I did not meet with M. Pardalis at St. Paulo ; but at Tabatinga, 80 miles further 
west, it again occurred, not however under precisely the same form as at Ega, but in a 
modified state, the yellow crossbelt and the spot at the hind angle of the fore wing having 
become of the same dark orange-brown hue as the rest of the wing. The same trans- 
formation of colour takes place in many species of Jleliconida in travelling from east to 
west, and I am inclined to think it is due to the direct action of the physical conditions 
of the localities on the early states of the insects. 
8. Melin^a Mnasias, Hewitson. 
Mechanitis Mnasias, Hewits. Exot. Butt. Mechanitis, fig. 5. 
Eound at Para, where it is rare. The species mimics most accurately in colours the 
Ceratinia Ninonia. var. JBarii. 
Genus Tithorea, Doubieday. 
Doubled, and Hewits. Gen. Diurn. Lep. p. 99. 
1. Tithorea Harmonia, Cramer. 
■ 
Papilio Harmonia, Cram. Pap. Exot. t. 190. f. C. 
Tithorea Megara, Doubled, and Hewits. Gen. Diurn. Lep. pi. 14. fig. 2. 
Cramer's figure was made from an aberrant example, in which, as frequently happens 
in the Heliconid a? , the black central stripe of the hind wing is partially connected with 
the hind border ; on this account Doubieday and other authors have passed it over, and 
given a new name to the species. The figure, however, is a very fair one, and recogni- 
zable by the tricuspid termination, on the outer border, of the fore- wing central yellow 
crossbelt, which distinguishes the species from all others. It is found pretty generally 
throughout the Amazon region, in the moister parts of the forest, and in company 
with Melmaia Mneme, Mechanitis Polymnia, &c. 
2. Tithorea Ctjparina. 
<5 2 . Size, shape, and general coloration of T. Harmonia. Fore lomg : above, with 
the basal half orange-tawny, the outer edge of this colour running very obliquely from 
the middle of the costa to the outer margin ; this is followed by an irregular and oblique 
clear yellow belt which crosses the costal part of the end of the cell and terminates in an 
obtuse point in the middle of the outer margin ; the apical part beyond the yellow belt is 
black, and is crossed in the middle by three yellow spots ; the basal third of the costa, 
the median nervure to the 1st branch, and the whole of the hind margin are bordered 
with black, besides which there are three black spots on the disk of the wing, namely, a 
triangular one in the middle of the cell, one across the end of the cell, and one between 
