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Show Knowlton: 1937] Utah Birds in the Control of Insect Pests 165 English Sparrow.-Passer domesticus (Linnaeus). Stomachs of 13 speci all contained wheat, totaling 70 kernels; 44 weed seeds in 4 stomachs; At Goshen, August 7, 1936, an all stomachs contained plant fragments. to be actively pursuing a Carolina locust, in observed was sparrow English flight. House Finch.-Carpodacus mexicanus frontalis (Say). Twenty-one stomachs were examined, nearly all of the contents being plant fragments. mens Other food consisted of 2 leafhoppers; 12 sunflower seeds; and 4 other weed seeds. Pine Siskin.-Spintts pinus pinus (Wilson). One specimen, collected at Torrey, September 20, 1935, contained 7 aphids, 1 mealy bug, 1 alfalfa weevil; plant seeds and insect fragments. Arkansas Goldfinch.-Astragalinus psaltria psaltria (Say). One speci men, taken near Flux, September 22, 1934, contained only plant fragments. Nevada Savannah Sparrow.-Passerculus sandwichensis nevadensis Grin nell. Eight stomachs contained 1 Orthoptera; 1 Hemiptera; 12 Homoptera, 5 being E. tenellus in 2 stomachs; 6 Coleoptera; 1 Lepidoptera : 184 weed seeds; plant fragments. Brewer's Sparrow.-Spizella breweri breweri Cassin. One bird collected thistle at Flux, September 22, 1934, contained 5 adult and 21 among Russian nymphal beet leafhoppers; 13 seeds; numerous plant and insect fragments. Western Vesper Sparrow.-Pooecetes gramineus confinis Baird. Nine teen stomachs contained 34 Hemiptera in 10 stomachs, including 28 N ysius ericae, the false chinch bug; 239 Homoptera, including 214 nymphs and 16 adult E. tenellus in 7 stomachs; 15 Coleoptera, including 3 alfalfa weevils; 13 lepidopterous caterpilarls; 2 Diptera, mosquitoes; 5 ants; 1246 weed seeds, a number of which were sunflower seeds; 17 grains of wheat; and plant fragments. One specimen, collected one mile north of Kelton among Rus sian thistle, September 28, 1935, contained 192 nymphs and 10 adults of beet leafhoppers in good recognizable condition besides numerous fragments of this pest; 11 Hemiptera, 9 being false chinch bugs. Such heavy feeding upon the beet leafhopper helps to materially reduce the numbers which otherwise might be available to reproduce and to migrate to beet and tomato growing districts during the following spring. Weste'rn Lark Sparrow.-Chondestes qrommacus strigatus Swainson. One specimen taken south of Nephi, May 13, 1936, among wheat, contained 2 grasshoppers and 1 beetle. Sage Sparrow.-Amphispiza belli nevadensis (Ridgway). Fifteen stom achs held 4 grasshoppers; 18 Hemiptera, 13 being false chinch bugs; 68 Homoptera, made up of 64 nymphal and 4 adult beet leafhoppers in 3 birds; 6 Coleoptera in 4, stomachs; 1 lepidopterous caterpillar; 14 Hymenoptera, 9 being ants; 2 spiders; 301 weed seeds; plant fragments. Shufeldt Junco.-funco hyemalis hyemalis (Linnaeus). Twenty-five stomachs contained 180 Homoptera in 18 stomachs, composed entirely of 13 adult and 167 nymphal beet leafhoppers in 12 stomachs; 3 Hemiptera in 3 stomachs; 9 adult and 11 larval Coleoptera in 4 stomachs; 2 adult and 36 larval Lepidoptera; 1 Diptera ; 4 Hymenoptera, all being ants; 1 spider; 134 weed seeds, a number of which were from sunflowers; numerous plant frag . ments. Clay Colored Sparrow.-Spizella pallida (Swainson). One specimen Dolomite, September 21, 1934, among Bassia hyssopifolia, con tamed 2 beet leafhoppers and 6 false chinch bugs, besides numerous insect fragments. Western Chipping Sparrow.Spizella passerine arizonae Coues. One hundred forty stomachs were examined, which contained 3 Orthoptera, grass hoppers, in 3 stomachs; 1 Collembola; 1 Trichoptera; 1 Odonata; 445 Hemip- colected at |
