8 BULLETIX 783, U. S. DEPAETINIEXT OF AGRICULTURE. 
The question has been raised by importers and manufacturers as 
to whether or not it is possible to retard the development of the rice 
moth in order that control measures may be undertaken at desirable 
times. While it was not possible to undertake any experiments 
along this line, it is known from analogy that development could be 
considerably retarded by cold storage. The egg period might be 
extended from the normal length of time, 3 to 10 days, to about a 
month ; the larval period to 6 months or more ; and the pupal period 
from the normal of from 5 to 11 days to 1 weeks or longer, making 
a possible total of about 8 months. 
While complete life-history data of this species would be desirable, 
what has been learned is sufficient to show that such life-history 
studies would not differ essentially from those of related species, 
such as the Mediterranean flour moth and the Indian-meal moth, 
and it has been developed that there is a practical certainty of four 
generations annually and a possibility of as many as six in high 
temperatures. 
ASSOCIATED INSECTS. 
The fig moth (Ephestia cautella Walk.), as previously stated, has 
been associated with this species in infested rice and cocoa products. 
In one rearing jar containing the rice moth breeding in cocoa, 
received June 18, 1915, the larvae of the latter were full grown on 
August 27. The jar was examined again on September 10 and appar- 
ently contained only the fig moth with its larvae. This latter had evi- 
dently " run out " the former, its larvae perhaps feeding on the larvae 
and pupae of the rice moth, which in nature is not an unusual occur- 
rence. 1 Some, however, remained, and in a few days the rice moth 
reappeared. In this particular rearing cage the fig moth must have 
deposited her eggs through the mesh covering the jar, although this 
was decidedly thick and closely woven. Fig-moth females have been 
known to do this in previous instances. 
The Indian-meal moth (Plod la interpunctella Hbn.) developed in 
great numbers in a lot of chocolate in which the rice moth had been 
reproducing abundantly, completely devouring the edible material 
and then perishing. 
It may be noted that when closely confined with edible material 
the three moths mentioned, in common with others which feed upon 
stored products, frequently perish because of the compact webbing 
which prevents escape and the lack of moisture which produces 
excessive drying of their food supply, curtailing the longer repro- 
duction period of the species. 
1 The larvae of the cabbage worm (Pontia rapae L.) have been noted feeding- on the 
«ggs of the cabbage looper {Autographa brassicae Riley). The corn earworm {Chloridea 
obsoleta Fab.) is also well known to be cannibalistic. 
