138 Trans. Acad. Sct. of St. Louis 
Time o0feet Yemile Ymile 3%, mile 1 mile 214 miles 
0-1 hr 35 14 34 0 1 0 
1-2 hr 21 13 19 1 bE 0 
2-3 hr 14 4 6 0 2 1 
3-4 hr 1 0 0 0 - 0 
4-5 hr 0 0 1 0 2 1 
5-6 hr. 0 2 0 0 0 0 
6-7 hr 0 1 0 0 0 0 
7-8 hr. 0 4 0 0 0 1 
2 night 6 5 12 9 0 2 
3 night 0 0 2 1 0 0 
6 night 0 0 0 1 0 0 
77 39 74 12 7 5 
Experiments on Telea polyphemus 
On May 7, I had on hand four polyphemus males, from 1% 
to 4 days old, but no females had yet emerged. The cecropia 
females were on the roof, however, and the wind was blowing 
through their cages toward the east. At 6:30 p. m. these four 
males were liberated in the park 225 yards east, to see if they - 
would respond to a sister species. None of them came to the 
windows. The same test was repeated on May 20, with two 
young male polyphemus. These were taken 1% mile east when 
there was no wind stirring; they too were lost. These two 
preliminary tests can hardly be classified with the experiments 
on polyphemus, since they were only to ascertain if this species 
is attracted by the females of a related species. These individ- 
uals showed no evidence of such a response. 
Exp. 1. May 21. Wind, northwest; station, 14 mile south. 
By this time I had two female polyphemus on the roof. At 
7:30 I liberated 7 males, from 1 to 3 days old. Two days later 
at 11 p. m. one moth, the youngest one, came in 
Exp. 2. May 22. The first native palyphectis male le 
peared at the cages on the roof at dawn. 
Exp. 3. May 22. Wind, northwest; station, 2 miles south- 
west. Seven males, aged from 1 to 24% days, were liberated 
two miles distant. None returned in this favorable win : 
Exp. 4. May 23. With 3 females on the roof, 3 native 
