Records from the Harvey County, Kansas study area include a series of 69 food items from 55 stomachs (of living snakes) and 210 food items from 113 scats. There is a relatively high proportion of vertebrates, including some frogs, in the stomachs, and with no frogs but more miscellaneous insect material in the scats. But, for the sake of brevity, the two categories of items are combined in the following list: 55 grasshoppers (12 unspecified, 1 "locustid," 31 "oedipines," 7 "tryxalines," 5 "locustines," 2 _Melanoplus bivittatus_ and one each of _M. femur-rubrum_, _M. scudderi_, _M. differentialis_, and _Arphia simplex_); 48 crickets (31 _Gryllus assimilis_, 17 unspecified); 14 katydids (11 _Daihinia brevipes_, one each of rhadiphorine, conocephaline and _Neoconocephalus_ sp.); 9 noctuid moths and 1 moth larva; 26 miscellaneous insects (including 13 "beetles," 1 elaterid, 1 curculionid, 1 lygaeid bug, 1 ant, 1 wasp); 1 spider, 7 mice (5 _Peromyscus maniculatus_, 2 unspecified), 4 unidentified mammals, 1 vole (_Microtus ochrogaster_), 1 shrew (_Cryptotis parva_), 84 lizards (77 _Cnemidophorus sexlineatus_, 6 _Sceloporus undulatus_, 1 unspecified), 6 snakes (4 "natricines," 1 _Thamnophis_ sp., 1 _Pituophis melanoleucus_), 1 "reptile," 1 "bird," 9 frogs (4 unspecified, 1 _Rana catesbeiana_, 4 _Rana pipiens_, 1 _Rana_ sp., 1 _Pseudacris triseriata_). _Kinds of Prey_ Throughout the range of the racer small mammals make up an important portion of the food, and the bulk of those eaten are voles (_Microtus_ sp.) and white-footed mice (_Peromyscus_ sp.). The voles being diurnal, and having habitat preferences similar to those of the racer, are especially subject to attack, but only large adult racers are capable of swallowing a full grown vole. Probably most of the voles eaten are immature. Of the white-footed mice, _P. maniculatus_ especially prefers a grassland habitat, and is usually found in situations frequented by the racer. Being mainly nocturnal and crepuscular, it is usually in hiding at times when the racer is prowling, but may be flushed from its nest in a shallow burrow or beneath a sheltering object, and overtaken by the snake. Other mammals that are important in the food are harvest mice and other mice, shrews, and young cottontails. The latter are small enough to be eaten by racers only in the early stages of their life in the nest before weaning. Rats (_Rattus_, _Sigmodon_), moles, sciurids, and weasels are less frequent prey, ordinarily too large to be eaten by racers and taken chiefly as defenseless juveniles.