89 
May 15. A chestnut-sided warbler ate 28 caterpillars in about 12 minutes. 
May 16. A scarlet tanager ate 44 caterpillars in 17 minutes. 
May 19. A redstart ate 11 caterpillars within 5 minutes. 
May 19. Two scarlet tanagers ate, one 9 and the other 16, caterpillars in 4 minutes. 
May 19. A black-and-white warbler ate 28 caterpillars within 10 minutes. 
May 22. A pair of chickadees ate, one 15 and the other 21, caterpillars in7 minutes. 
May 23. A red-eyed vireo ate 43 caterpillars in 10 minutes. 
May 23. A blue jay ate 30 caterpillars in a very brief stay (no time given). 
May 23. A Baltimore oriole ate 34 caterpillars in 6 minutes. 
May 24. A red-eyed vireo ate 29 caterpillars in 6 minutes. 
May 25. A scarlet tanager ate 43 caterpillars in 12 minutes. 
May 26. A yellow-throated vireo ate 14 caterpillars in less than 5 minutes. 
May 26. A male indigo bird ate 16 caterpillars (time could not be accurately 
taken). 
BIRDS THAT FEED ON LARVZ OF CLISIOCAMPA AMERICANA. 
May 9. A golden-winged warbler ate 14 caterpillars very rapidly. 
May 10. A red-winged blackbird ate 22 caterpillars in 25 minutes. 
May 10. A Baltimore oriole ate 14 caterpillars in 6 minutes, 27 in 8 minutes, and 
10 in 3 minutes. 
May 10. A robin ate 30 caterpillars in a trifle over 4 minutes. 
May 10. A black-and-white warbler ate 12 caterpillars in a very short time and fed 
for 9 minutes, though not in plain view. 
May 11. A Nae alle warbler ate 8 caterpillars in 3 minutes. 
May 15. A Baltimore oriole ate 15 caterpillars from a web in a very short time 
and 9 more 20 minutes later. 
It will be noted that two scarlet tanagers ate small gipsy caterpillars 
at the rate of 35 a minute for eighteen minutes. Where these dispar 
larve are plentiful the tanagers feed much on them day after day. 
Should a pair of tanagers feed at the rate of 35 a minute for one hour 
a day, they would destroy 2,100 each day, which would be 12,600 in a 
week, and this number is probably not beyond the range of possibility 
during a week when the caterpillars are small. Should they feed for 
several hours a day they might even exceed this estimate. What 
could be expected of a bird the size of a crow can only be conjectured. 
As the crows, although feeding largely on hairy caterpillars, are so shy, 
it is difficult to obtain accurate data as to the number they eat. 
It is interesting to note that most of the families of birds feeding on 
dispar are also represented in the list of those which destroy other 
hairy caterpillars. It is probable, therefore, that most birds which 
feed on one will feed on another. When one considers the disagreea- 
ble effects attributed to certain hairs of the Huproctis chrysorrhea, 
which certainly produce a very painful irritation when applied to the 
human skin, it would seem that the larve of these insects must be 
quite as well protected against birds as any species, yet the evidence 
shows that they are eaten in quantity by as many species of birds as 
eat the larvee of dispar. 
Among those families of birds most useful in destroying hairy cater- 
pillars in Massachusetts are the cuckoos, crows, orioles, sparrows, 
