318 Dr. Frederick A. Dixey on the 
This last feature in coloration is again met with in 
Eroessa and Huchloe, the neuration of which genera 
corresponds pretty closely with that of Hronia, not only 
in the presence of five subcostal branches in the forewing, 
but also in other particulars. The general likeness 
between Hronia leda and Huchloe belia, Linn., is very 
striking, and strongly suggestive of a near affinity 
between them. The well-known form of the pupa in 
Huchloe is an exaggeration of that seen in Hroma 
cleodora.* In some other points, however, Huchloe is 
nearer to Colias, as in the strong development of the 
discoidal spot in the primaries, and in the possession by 
some species of pink legs and a pink edging to the wings. 
This last feature is characteristic of the charlonia group 
of Huchloe, and is best seen in LH. lucilla. The underside 
of the hindwing in the same group has very much the 
character of the corresponding region in Colias paleno, 
including the pale undeveloped discoidal spot. The 
anteunee, however, of Huchloe are very distinct in form 
from those of Colias, and indeed are not much nearer 
those of Hronia. On the whole it seems most likely that 
Huchloe is a somewhat aberrant branch which takes its 
rise from the Pierine stem at a point near the divergence 
from the same stem of Hebomoia on the one hand, and 
H. (2) lucastt with the rest of the Hromia and Nepheronia 
group on the other. The isolated form Hroessa chilensis, 
which in neuration approaches the older Hronias (as 
E. (?) lucasti) and Hebomova, is perhaps a survival of a 
once more widely-spread and numerous assemblage, 
among which were to be found the immediate ancestors 
of the present-day Huchloes. Zegris seems to be a some- 
what highly modified offshoot of the Huchloe branch. 
We must now retrace our steps as far as to the group 
which I have called “ Pierines of the second grade,” those, 
namely, that are typified by Delias in the Hastern and 
Catasticta in the Western hemisphere. The latter genus 
with its near ally Leodonta forms a starting-point for a 
New-World division of the Pierine stem, which, if not 
equal in magnitude to the great division headed in the 
* The pupa in Ewchloe is not always recurved. See Edwards’s 
figures of Anthocharis (Euchloe) genutia and A. ausonides in 
“ Butterflies of North America.” See also Schatz, Exotische 
Schmett., Theil 11., 1892, p. 71. 
