160 PAPEES ON CEEEAL AND FORAGE INSECTS, 



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Sorghum, bagging heads as protection against sorghum midge 58 



clean harvesting against sorghum midge 58 



destroying heads of first crop as remedy against sorghum midge 58 



food plant of Aphis maidi-radicis 97 



Contarinia sorghicola 44-45 



midge. (See Contarinia sorghicola.) 



sweet, host plant of Contarinia sorghicola, varieties attacked 44-45 



Sorrel. (See Oxalis stricta.) 



Sparrow, Aleutian savanna. (See Passerculus sandwichensis.) 

 chipping. (See Spizella passerina.) 



English, destructive to sorghum seed 39-40 



fox. (See Passerella iliaca.) 

 song. (See Melospiza melodia.) 

 swamp. (See Melospiza georgiana.) 

 white crowned. (See Zonotrichia leucophrys.) 

 throated. (See Zonotrichia albicollis.) 



Sphyrapicus varius, enemy of Tipulidse 129 



Spike-grass, marsh. (See Distichlis spicata.) 



Spizella passerina, enemy of Sitones hispidulus 37 



Sporobolus airoides, abundance of range caterpillars thereon 77 



food plant of Hemileuca olivise 79 



Sporotrichum densum, fungous enemy of Tipula infuscata 130 



Squash, food plant of Aphis maidi-radicis 97 



Stelgidopteryx serripennis, enemy of Tipulidse 130 



Stenopogon picticornis, enemy of Hemileuca olivise 92 



Strawberries, food plants of Aphis maidi-radicis 97, 111 



Sturnella magna, enemy of Sitones hispidulus 37 



Tipuhdae 129 



Swallow, bank. (See Riparia riparia.) 



barn. (See Hirundo erythrog aster .) 

 cliff. (See Petrochelidon lunifrons.) 

 rough-winged. (See Stelgidopteryx serripennis.) 

 tree. (See Iridoprocne bicolor.) 

 Swift, chimney. (See Chxtura pelagica.) 



Tachina nulla, parasite of Hemileuca olivise ■ 88-91 



Tanager, western. (See Piranga ludoviciana.) 



Tel matodytes palustris, enemy of Tipulidse 130 



Temperature as affecting change in color of moths of Hemileuca olivise 86-87 



Tetrastichus sp., parasite of Contarinia sorghicola 55-57 



Teucrium laciniatum, food plant of Aphis maidi-radicis 104 



Thistle, Russian. (See Salsola tragus.) 

 Thrasher, brown. (See Toxostoma rufum.) 



California. (See Toxostoma redivivum.) 

 Thrush, Alaska hermit. (See Hylocichla guttata.) 

 Alice? (See Hylocichla alicise.) 

 russet-backed. (See Hylocichla ustulata.) 

 Swainson. (See Hylocichla ustulata swainsoni.) 

 Wilson. (See Hylocichla fuscesens .) 

 wood. (See Hylocichla mustelina.) 



Thryomanes bewiclcii, enemy of Tipulidae 130 



Timothy, Texan. (See Lycurus phleoides.) 



Tipula abdominalis, aquatic in early stages 120 



flying in August and September 120 



