as has been observed with the hybrids obtained by the crossing of
_Smerinthus populi_ with _Sm. ocellatus_? I do not think that such will
be the case with the moths of the hybrid Roylei-pernyi, on account of
the close relationship of Roylei with Pernyi, but nothing certain can be
known till the moths have emerged. Here are the few notes taken on the
hybrid Roylei-pernyi: Ova commenced to hatch on the 12th of June; these
were from the pairing which had taken place on the 21st of May. Larvae,
black, with long white hairs. Second stage commenced on the 21st of
June. Larva, of a beautiful green; tubercles orange-yellow; head dark
brown. Third stage commenced on the 1st of July; fourth stage on the
7th. Larva of same color in those stages; tubercles on the back,
violet-blue or mauve; tubercles on the sides, blue. Fifth stage
commenced on the 18th of July. Larva, with tubercles on back and sides,
blue, or violet-blue. First cocoon commenced on the 10th of August. Want
of time prevented me from taking fuller and more accurate notes.

_Attacus Atlas_.--For the first time, as stated before, I attempted the
rearing of a small number of Atlas larvae in the open air on the ailantus
tree, but had to remove the last two remaining larvae in September; the
others had all disappeared in consequence of the heavy and incessant
rains. These larvae were from eggs sent to me by one of my German
correspondents. The pairing of the moths had taken place on the 17th of
July, and the eggs had commenced to hatch on the 4th of August.

I had about eighty cocoons of another and larger race of Atlas imported
from the Province of Kumaon, but only eight moths emerged at intervals
from the 31st of July to the 30th of September. Not only did the moths
emerge too late in the season, but there never was a chance of obtaining
a pairing. In my report on Indian silkworms, published in the November
number of the "Bulletin de la Societe d'Acclimatation," for the year