i22 OHIO EXPERIMENT STATION. 
angusii) and one common brown caterpillar (Pyrrharctia isabella) which 
- is sometimes injurious to garden vegetables. 
The summary for the month is as follows: 
Fruit, 54 per cent. in 44 stomachs. 
Mollusca, 2.94 per cent in 5 stomachs. 
Insects, 43.06 per cent. in 46 stomachs. 
Beneficial species, 66.97 per cent. 
Injurious species, 10.86 per cent. 
Neutral species, 22.17 per cent. 
Ju'y.—Forty-five robins were shot during this month, 25 on the Station 
grounds, 12 at Westerville, in the same county, and 8 at Sugar Grove, in 
Fairfield county. The percentage of vegetal food reaches its maximum 
during this month (61.75 per cent), The ratio of insect food is in con- 
sequence proportionately reduced, the Diptera and Hemiptera showing the 
greatest decrease. The Curabidx are, in proportion to the number of 
Coleoptera, a8 important an element of food as they were in June. The 
proportion of Lepidoptera remains about the same, while perhaps the most 
striking feature is the great increase of ants, which furnished 9.21 per cent. 
of the entire food for the month and were found in 15 stomachs. Prof. 
Forbes, in his work on the feeding habits of the robin, records a similar 
incresse of ants for the month of June. ; 
The general summary for July is: 
Vegetable food, 61.75 per cent. in 38 stomachs. 
Mollusea, 5 per cent. in 1 stomach. 
Vermes, 1 per cent. in 2 stomachs. 
Crustacea, 5 per cent in 1 stomach. 
Myriapoda, 5 per cent. in 1 stomach. 
Arachnida, 5 per cent. in 1 stomach. 
Insecta, 35 25 per cent. in 42 stomachs, 
Beneficial species, 71.77 per cent. 
Injurious species, 14.23 per cent. 
Neutral species, 14.00 per cent. 
August.—- During this month the vegetal food drops away nearly 
one-half. There is a perceptible increase in worms, spiders, myriapods 
and crustaceans. The percentage of insects is considerably increased. 
Beetles are more than doubled; Carabidz are doubled and Scarabzidz 
quadrupled ; Diptera and Heteroptera are present in slightly larger propor- 
tions; Lepidoptera were a little on the decrease, and ants were about half 
as numerous as during July. During August Urthopiera came into some 
importance and make up 6.875 per cent of the robin’s food for the month. 
This percentage is mostly of the common species, Melanoplus femur-rubrum, 
the red-legged grasshopper, and Dissosteia carolina, a large grasshopper 
with yellow hind wings. 
