WiUon-Yickery—List of Aphidddae. 
169 
tribulis, Aphis Walker, 1849. The Zool. VII, p. 34, app. 
Vida sepium. 
tricolor, Chaitophorus Koch, 1854. Die Pflanzenlause Aphiden, p. 
9, fig. 
Betula alba, B. nigra, 
tridentatae, Aphis Wilson, 1915. Trans. Amer. Ent. Soc. XLI, p. 
94; fig. 
Artemisia tridentata. 
tridentatae, Chaitophorus Wilson, 1915. Trans. Amer. Ent. Soc. 
XLI, p. 89, fig. 
Artemisia tridentata. 
trifolii, Aphis Oestlund, 1887. Aphididae of Minnesota, p. 56. 
Trifolium pratense, T. repens. 
trifolii, Macroslphum Pergande, 1904. U. S. Bureau of Ento 
mology, Bui. 44, p. 21. 
Avena sativa, Fragaria sp., Sonchus oleraceus, Taraxacum oMdnale, 
Trifolium pratense, Triticum vulgare. 
trifoUi, Macroslphum Theobald, 1912. Tran. Second Ent. Con¬ 
gress, p. 384, also 1913, Jour. Econ. Biology, VIII, No. 3, 
p. 139. 
Trifolium procumbens. 
trifolii, Myzocallls (Monell), 1882, Can Ent. XIV, p. 14. Callip- 
terus. 
, . Trifolium pratense, T. repens. 
triphaga. Aphis Walker, 1852. List Homop. Insects Brit. Museum, 
part 4, p. 1041. 
Epilobium sp. 
trirhoda, Hyalopterus (Walker), 1849. Ann. Mag. Nat. Hist., 
(2),IV, p, 45. Aphis. , 
Aquilegia vulgaris, Rosa canina, R. gallica, Rubus ulmifoUus. 
tritici, Brachycolus Gillette, 1911. Ent. News, XXII, p. 441, fig. 
Agropyron glaucum, A. occidentale, Bromus secalinus, Phleum 
pratense, Stipa comata, Triticum vulgare. 
trivialis, Tychea Passerini, 1860. Gli Afidi, p. 40. 
Agropyron repens, Bromus arvensis, B. mollis, B. sterilis, Cynodon 
dactylon, Digitaria filiformis, Fostuca elatior, F. ovina-durius- 
cula, Poa annua, P. pratensis, P. trivialis, Betaria sp., Triticum 
spelta, T. vulgare. 
