The Ecology of a Sheltered Clay Banh 207 
the following season, although they were abundant along 
the railroad tracks less than two hundred yards away, 
but instead the blue-tailed lizard or skink appeared in 
their place. The blue-tailed lizard had evidently sup- 
planted its predecessor, but since its habits are the same, 
very probably its function among and relation to the 
inhabitants and visitors at the bank were practically 
the same. This idea was strengthened when on three 
mornings in early June, 1922, a third species Cnemido- 
phorus sexlineatus [D. M. Cockran], was seen coming 
out of a burrow and calmly making the rounds of the 
clay bank, often entering the bee burrows. It would 
enter head first, with the tail protruding, and often it 
would perform the quaint feat of, twisting its tail about 
the turret while its body was inside the tunnel. It 
seemed to find the burrows adequately roomy, for it 
would enter head first and also emerge head first. What 
it got out of the burrows I do not know, but since this 
lizard was seen to snap at Anthophora bees in the open, 
I suppose many of these bees were eaten within the 
burrows. The Chalcid parasites were also in abundance, 
and wild roaches were often seen in the burrows. The 
red-eyed flies, Ganperdea apivora, were numerous 
at just that time, and the skinks were seen successfully 
capturing these, and a few undetermined insects, in the 
open. 
Toads. 
In 1920 a big toad was a familiar figure about the 
bank. Before the end of the season, he had the portly 
figure of a war-time profiteer, and we felt justified in 
Suspecting that the rest of the population had suffered 
accordingly. 
