elders and is starting to dig. Greenie disappeared again, reappearing at the glade about 10 o'clock without bringing food. When I showed him worms he came and took them to No.4, although this one had just been fed a few minutes before by Brownie, who incidentally on this occasion, picked up and dropped a number of large twigs. Greenie then spent a full half hour in going over himself thoroughly and was still at it when I left about 10:30. Both adults, especially Brownie seem to have something that causes them to scratch almost incessantly, whether it is lice or the beginning of the moult I do not know. Brownie is evidently very uncomfortable and I should judge spends now as much time in working on herself with her bill and scratching as in doing anything else. In the middle of a feeding or digging op- eration she may suddenly stop and either scratch violently or select some particular spot and work on it with her bill. The more I observe their sunning habits, the more it seems to me that it is associated with their skin and feather parasites. On cool days they do not sun-fit at all. On uncomfortably hot days they do it the most. It certainly appears xx the application of the highest possible degree of available radiant heat to the skin is the object sought. When the day is so warm that they like to lie on the ground in the shade with their bills open and, when walking about droop their wings and carry them set out from their bodies, then is the time they select a good hot spot in full sun and let its rays penetrate between the fluffed-out feathers and under the upraised wings. They do not look as if they enjoyed it, quite the contrary, but I know of no way to determine what their sensations are. It is known, of course, that moderately high temperatures destroy some forms of insect life. Thus, if my memory serves me, there is a U.S. depart- mental bulletin on the clothes moth, in which I think the statement only is made that the larvae are killed by a temperature of 125 degrees F., acting over a certain period of time. This takes no account of the