74 Wisconsin Academy of Sciences, Arts, and Letters. 
exsiccator, Lachnus Altum, 1882. Forst Zoologie, III, p. 353, fig. 
Fagus sylvatica. 
exul, Aphis Walker, 1849. The Zool. VII, p. 31, app. 
Pelargonium sp. 
exul, Aphis Walker, 1849. The Zool. VII, p. 48, app. 
Bamhucus nigra. 
*fabae. Aphis Blanchard, 1840. Hist. Nat. Ins., Ill, p. 207. 
Yicia faba. 
fabae. Aphis Scopoli, 1763. Entomologia Carniolica, p. 139. 
Vida faba. 
*fagi, Chermes Altum, Forst Zoologie, III, p. 359, fig. 
Fagus sp. 
fagi, Chermes Linnaeus, 1761. Fauna Suecica, editio altera, p. 
263. 
*fagi, Phyllaphis (Linnaeus), 1767. Systema Naturae, Edition, 
12, p. 735. Aphis. 
Fagus ferruginea, F. grandifolia, F. sylvatica. 
fagifoliae. Pemphigus Del Guercio, 1913. Redia, IX, p. 175, fig. 
Fagus sp. 
familiaris. Aphis Walker, 1848. The Zool., VI, p. 2220. 
Lycopsis arvensis. 
farfarae. Aphis Koch, 1854. Die Pfianzenlause Aphiden, p. 54, fig. 
Adenostyles albida, Tussilago farfara. 
farinosa. Aphis Gmelin, 1788. Systema Naturae, I, part 4, p. 2210. 
Salix sp. 
farinosus, Pterocomma Del Guercio, 1913. Redia, IX, p. 178, fig. 
Lamium sp. 
*farinosus, Lachnus Cholodkovsky, 1891. Rev. Sci. Nat. St. Pe¬ 
tersburg, No. 8, pp. 294-305. 
Picea abies, P. glauca, P. pungens, Pinus sp. 
fasciata, Macrosiphoniella Del Guercio, 1913. Redia, IX, p. 117. 
For description see page 189, fig. 
Artemisia campestris. 
