Corio) 
IT. Some undescribed Butterflies from Dutch New Guinea. 
By Sire Georce H. Kenrick, FES. 
[Read October 19th, 1910.] 
PEATEs wit VT, 
I HAVE already described some butterflies of the genus 
Delias from New Guinea, and I now add descriptions of 
three more from the Arfak mountains in the north of the 
Island. 
I also describe one species of Ornithoptera, which may 
possibly be a local form of O. chimaera, but as my collector 
did not meet with any intermediate forms between it and 
the type in any part of the country visited by him, I am 
inclined to consider it as a good species. 
It appears that Mr. C. B. Pratt regarded the female of 
O. tithonus as the female of O. chimaera at first, not meeting 
with the male of O. tithonus for some time. When he 
afterwards found 0. tithonus f in company with this female, 
he began to suspect his error, and he subsequently found 
the true female of O. chimaera, 
I have accordingly figured both sexes of both insects. 
Writing of 0. ¢ithonus he says, “'The day after we arrived, 
we each took one specimen of the male—one fortunately 
being perfect. Soon after we noticed a tree overhanging 
a steep precipice, with a sheer drop of 500 ft. to the river 
below. 
“Flying round and round this tree were many males 
and females, more of the former than the latter. We 
offered the natives very good payment if they would go up 
with a net, but the tree was of a soft kind of wood, and 
being in such a dangerous position we could not persuade 
them todo so. We ourselves guarded the ridge every day, 
but the males never once left the tree, so after some time 
we had the tree cut down, thinking that then the males 
would disperse and seek other flowering trees, but after 
the tree had fallen we never saw another male.” 
The first specimen of O. rothschildi, a male, was brought 
to Mr. Pratt by a native, who said that he had taken it on 
TRANS. ENT. SOC. LOND. 1911.—PARTI. (MAY) 
