The largest sample, based on 1008 food items, was obtained from 479 scats collected from the Reservation and Rockefeller Tract over the period 1949 through 1961. Items recorded were: 183 gryllid crickets (144 _Gryllus assimilis_, 36 _Gryllus_ sp., 3 unspecified); 353 locustid grasshoppers (41 unspecified, 73 _Arphia simplex_, 67 _Melanoplus femur-rubrum_, 66 _M. bivittatus_, 39 _M. differentialis_, 17 _Melanoplus_ sp., 15 _Dissosteira carolina_, 8 _Chortophaga viridifasciata_, 6 _Syrbula admirabilis_, 6 _Sphargemon equale_, 2 _Melanoplus scudderi_, 2 _Schistocerca obscura_, 1 _S. americana_); 94 camel crickets (_Ceuthophilus_ sp.), 93 katydids (36 _Neoconocephalus robustus_, 15 _Orchelimum vulgare_, 15 _O. nigripes_, 6 _Conocephalus_ sp., 4 _Orchelimum_ sp., 2 _Amblycorypha inasteca_, 1 _Neoconocephalus_ sp., 1 _Daihinia brevipes_); 7 cicadas (5 _Tibicen_ sp., 1 _T. pruinosa_, 1 _T. lyrica_); 45 unidentified insects; 17 beetles (including 1 _Phyllophaga_, 1 _Calosoma scrutator_, and 2 other carabids); 2 noctuid moths (_Mocis latipes_) and 1 caterpillar; 2 homopterans, 1 bee, 1 ant, 1 spider; 69 voles (59 _Microtus ochrogaster_, 9 _Microtus_ sp., 1 _M. pinetorum_); 31 white-footed mice (15 _Peromyscus leucopus_, 14 _Peromyscus_ sp., 1 _P. maniculatus_); 36 miscellaneous small mammals (6 _Cryptotis parva_, 4 _Sigmodon hispidus_, 4 _Reithrodontomys megalotis_, 3 _Blarina brevicauda_, 2 each of _Scalopus aquaticus_, _Sylvilagus floridanus_, and 1 unspecified shrew); 50 snakes (16 _Coluber constrictor_, 15 _Diadophis punctatus_, 14 _Thamnophis sirtalis_, 4 _Elaphe obsoleta_, 1 _Natrix sipedon_); 7 lizards (5 _Eumeces fasciatus_, 1 _E._ _obsoletus_, 1 _Cnemidophorus sexlineatus_); 3 unspecified "reptiles"; 5 birds (none identified to genus); 3 bird eggs, 1 narrow-mouthed toad (_Gastrophryne olivacea_). [Illustration: Fig. 14. Diagram showing estimated percentage by weight of various categories of prey in a sample of 1351 items, including all those represented in Fig. 13 and others from various parts of Kansas. Since the vertebrate items are on the average much bulkier than the insects eaten, vertebrates comprise most of the food, even though insects are eaten in much larger numbers.] [Illustration: Fig. 15. Diagram showing estimated percentages by weight of various categories of prey in a sample of 69 food items squeezed out of stomachs of the blue racers captured at Harvey County Park. Most of the items were vertebrates, and lizards (_Cnemidophorus_) were especially prominent in the food at this locality. Samples of prey from scats (included in Figs. 13 and 14) and from stomachs show somewhat different trends, and neither is entirely representative of the actual feeding. Also, local differences in food sources are important.]