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immense size. The largest of the gloveri-cecropia hybrid are 
larger than any cecropia I ever saw. The ceanothi-cecropia 
hybrids are very large too, though none attained the size of a 
few of the ? ? of the gloveri-cecropia. The moths vary 
as much from each other as if they belonged to an entirely 
different species. The most remarkable thing about them, 
I think, is their total barrenness. I have never known a 
hybrid to lay an egg, or the ^ ^ to fertilize, though 
both sexes mate freely with each other and with cecropia. 
The columbia-cecropia hybrid (not here represented G.C.G.) 
varies more than any of the others I have raised; some 
being deep red-grey, others pinkish-grey, and yet others the 
ordinary grey of cecropia. The only trouble in pairing is that 
you must have a ? of the species you wish to attract to your $ 
which you want to hybridize. With the ceanothi, having 
several (a dozen cocoons), I left her in the cage with the door 
open, a ? cecropia being in a cage above her with the door shut. 
The $ $ were attracted by the cecropia, and being unable 
to reach her one paired with the ceanothi. With the gloveri 
I had no $ ? of cecropia out that day^ but put two ^ ^ in 
the same cage with the ? gloveri, and the strongest paired 
with her in the cage. I had but three cocoons of gloveri in 
all, which produced two ? $ and one $ ; the $ and one of 
the ? ? paired, the other ? paired with cecropia. With luna 
and selene I had no ^ luna but four or five $ ? came out the 
same day, and at night I tied the $ selene on a hickory-nut 
tree, putting the ? luna in a cage at the foot of the tree ; in 
the morning she was paired with a wild luna. Another 
curious feature in these hybrids is that they often remain two 
years in the cocoons, twenty-five emerged the second year 
from the same larvae bred during same season. With the 
luna-selene all the $ ? resembled ? luna, all the $ $ fol- 
lowed selene : selene being the mother of the brood. These 
all came out the same summer, from August 30th to 
November of the same season, of course the latter stages 
reared in the house." 
To these remarks of Miss Morton I will simply add that 
one of the most striking points about these hybrids is the 
manner in which certain of their markings are itensified 
