90 Wisconsin Academy of Sciences, Arts, and Letters, 
holci, Aphis Ferrari, 1872. Ann. Mus. Civ. Stor. Nat. Genova, II, 
p. 62. 
Holcus mollus. 
hordei, Aphis Kyber, 1815. Germars Mag. Ent., I, part 2, p. 15 
Hordeum vulgare. 
hordei, Aphis Del Guercio, 1913. Redia, IX, p. 205. 
Hordeum murinum. 
horvathi, Trama Del Guercio, 1909. Redia, V, p. 252, fig. 
Cichorium intyhus, Leontodon taraxaci, Sonchus aspcris, S. olera- 
ceus. 
houtenensis, Aphis Troop, 19 06. Ent. News, XVII, p. 59. 
Rihes rotundifoUum, R, sanguineum. 
howardii, Amphorophora Wilson, 1911. Can, Ent. XLIII, p. 59. 
Dactylis glomerata, Elymus canadensis, E. virginicus, Glyceria ner- 
vata. 
humilis, Aphis Walker, 185 2. List. Homop. Insects Brit. Mu¬ 
seum, part 4, p. 1038. 
No food plant given. 
humuli, Phorodon (Schrank), 18 01, Fauna Boica, II, p. 110. 
Aphis. 
Asparagus officinalis, Humulus lupuius, Prunus domestica, P. in- 
sititia, P. mahalel), P. pissardi, P. spinosa. 
hyalinus, Lachims Koch, 1857. Die Pfianzenlause Aphiden, p. 
238, fig. 
Picea aMes, Pinus sp. 
hyalinus, Myzocallis (Monell), 1879. Bui. U. S, Geol. & Geog. 
Surv. Terr., V, No. 1, p. 30. Callipterus. 
Quercus imdricaria, Q. lamellosa, Q. stellata. 
hyosciami, Aphis Kittel, 18 27. Mem. Soc. Linn. Paris, V, p. 149. 
Hyoscyamus niger. 
hyperici, Callipterus Monell, 1879. Bui. U. S. Geol. & Geog. Surv. 
Terr., V, No. 1, p. 25. 
Hypericum kalmianum, H. prolificum. 
hyperici, Myzocallis Thomas, 1879. Eighth Rept. State Ent. Ill., 
p. 108. 
Hypericum prolificum. 
