PHYCIODES II. 
Dimorphic form ^ESTIVA. (Figs. 18, 19.) 
Same size as the winter form, and often not to be distinguished from it by the 
appearance of the upper side; but many examples are very black, the fulvous 
markings all reduced; on the other hand, some have the fulvous preponderating, 
as in the lighter examples of the summer form of Thctros, which they then 
greatly resemble; on the under side, primaries differ in no important respect 
from the winter form ; secondaries uniform light ochraceous, the reticulations 
very fine, brown or ferruginous, and disposed as in the summer Phaon , the mar¬ 
ginal cloud slight and narrow, the costal patch slight or wanting. In the female 
the ground is varied in pale and darker yellow, the band pale, as are several of 
the spots in the interstices near base ; all the lines heavy, ferruginous ; the mar¬ 
ginal cloud extended toward the disk, the costal patch larger; there is also a 
distinct ferruginous patch on middle of the disk, as in one of the varieties of 
summer Thctros. 
Vesta seems to be common in middle and southern Texas, and I have received 
a long series of examples from Mr. Boll, showing all the variations observed by 
him. There is no marked difference between individuals of the winter form. 
The species flies in successive generations, from February to November, and there 
must be at least five annual broods. The food-plant is at present unknown, as 
are also the preparatory stages. 
