ent in late summer and early autumn and they continue feeding on
crops until the first killing frost. The greatest damage is caused by
the destruction of the foliage of corn, wheat, and alfalfa (Smith, _et
al._, 1943:126). The consumption of grasshoppers closely followed the
curve of their availability, since they are a preferred food of the
crow. They were picked up in small quantities even in winter. In summer
they made up 6 to 10 per cent of the diet of the crows in eastern Harvey
County. Through the late summer and autumn this percentage rose, until
during the first half of October they made up 59.6 per cent of the
diet. However, in the western part of the study area, they constituted a
smaller part of the diet.

Predation upon grasshoppers, especially in summer and early autumn,
benefits the farmer by helping to stabilize populations of grasshoppers.
However, when grasshopper consumption was highest, in early October,
many of those eaten probably already had completed their breeding cycle,
and their consumption was hence of little significance economically or
ecologically.

Ants were consumed only in September and October when they constituted
as much as 14.9 per cent of the diet. Crows may make an entire meal from
a large colony; at any rate, whenever ants were found in a pellet, they
constituted a large percentage of it.

Miscellaneous insect remains constituted two-tenths of one per cent of
the yearly diet. Hemipteran remains were present only in trace
quantities (.5 per cent of the July 13-26 sample from eastern Harvey
County).

Only a few questionable fragments from insect larvae were found in the
pellets collected in the course of this study. However, as mentioned
earlier, there is evidence that larvae constituted a major food supply
during much of the summer.

Many investigators have found that crows feed on grubs and caterpillars
(Aldous, 1944; Alexander, 1930; Lemaire, 1950; Kalmbach, 1918; Barrows
and Schwarz, 1895). A number of county agents with whom I had
correspondence mentioned that crows aided the farmer in this way. More
investigation is required to determine the significance of crow
predation upon insect larvae in this area. Most of the bone material
recorded was fragmentary. Phalangeal or podial elements of rodents and
various bones of rabbits were identified. The only teeth identified were
those of the genus _Rattus_. Barrows and Schwarz (1895:24-25) found that
small bones of mammals may b