ENCLOSURE TO PART 1V. 7) 
Perhaps the only economic justification for the study of this 
insect is to endeavour to ascertain if its natural enemies are likely to 
prove of any value against the true cotton feeding Platyedra 
gossypiella, Saund, and some time is being devoted to this object. 
Further work, however, is still needed before it will be possible to 
determine whether or no its insect enemies are of sufficient importance 
to export to countries where the pink boll-worm seriously damages the 
cotton crop. As the true cotton feeding Platyedra gossypiella does 
not occur in Uganda, any experiments to test the efficacy of parasites 
of the Hibiscus-feeding race must of necessity be made elsewhere. 
It will suffice at present to state that parasites belonging to three 
genera Microbracon, ? Chelonus, and ? Apanteles have been bred from 
the seed capsules of Hibiscus diversifolius and the foremost species has 
been observed to feed as an external parasite on the Platyedra larva. 
The whole life cycle of the Microbracon qeeupies not more than 20 
days, but it has not been found possible to induce it to oviposit in 
captivity, a difficulty which has been reported from America with 
Microbracon mellitor, Say, a parasite of P. gossypiella on that 
continent. * 
It is hoped that sufficient data will have been collected to publish 
a short account of this insect next year. Specimens of the parasites 
mentioned above are exhibited here and any information which you 
may be able to give concerning the species of parasites which attack 
Platyedra in your countries will be very welcome. 
(Nore.—Subsequent to the reading of the above paper, informa- 
tion was received to the effect that Mr. Meyrick had agreed to separate 
the Platyedra on Hibiscus from that occurring in cotton as a distinet 
and new species for which he proposed the name P. erebodoza.) 
Mr. RITCHIE stated that he had not as yet had an opportunity 
of visiting the Tanganyika area bordering on Uganda, in the neighbour- 
hood of the Kagera River, near which Mr. Hancock found the 
Platyedra which formed the subject of his paper, but that he proposed 
in the near [uture to make a survey of all that country. There was 
one interesting point in this connection in Tanganyika, namely, that 
one of the most important of the parasites of Platyedra was not found 
on cotton but on okra (Hibiscus esculentis). 
Mr. HARGREAVES thought that possibly that form of Platyedra 
was the one which had been described as being found on Hibiscus. 
Mr. RITCHIE said that as far as he knew, cotton and okra were 
the only hosts for Platyedra in Tanganyika Territory. In okra 
pupation takes place nearly always in the pod, but in cotton it seems 
to take place only in the soil. 
Some discussion then took place as to the possibility of the new 
Platyedra found in Uganda becoming a cotton pest, and Mr. 
Hargreaves stated that in Queensland both the Hibiscus and the cotton 
forms are found, and that the Hibiscus form does not attack cotton. 
He also stated that cotton was growing in the vicinity of the 
place in which the Platyedra was found in Uganda, and that it was 
not being attacked by it. 
After further discussion it was agreed that the following conclusion 
should be presented to the general Conference on this subject: — 
That the Platyedra erebodoxa discovered by Mr. Hancock 
shows no indication of becoming a pest of cotton in Uganda. 
* U.S. Dept. Ag. Bull. 1874 (March. 1926). 
JOC