INDEX 



Acer (see also Maple). Page. 



dasycarpum—Acer eriocarpum 7 



original food plant of Prociphilus tessellaia 9-14 



Adalia bipundaia, enemy of Prociphilus tessellata 11 



Alder (see also Alnus). 



alternate food plant of Prociphilus tessellata 14-18 



blif^ht aphis. (See Prociphilus tessellata.) 



food plant of Psylla alni 9 



Alnus {see also Alder). 



rubra, food plant of Prociphilus tessellata 6, 7 



rugosa, food plant of Prociphilus tessellata 12 



Ants associated with Prociphilus tessellata 11 



Aphis stamineus, description by Haldeman 7 



= Prociphilus tessellata 6 



Birch, food plant of Hamamelistes spinosus 5 



Hormaphis hamamelidis 5 



Camponotus pennsylvanicus, association with Prociphilus tessellata 11 



Clierines alni. (See Psylla alni.) 



Chrysopa quadripunctata, enemy of Prociphilus tessellata 11 



sicheli=Chrysopa quadripunctata 11 



Oreinastogaster lineolata, association with Prociphilus tessellata 11 , 1 8, 23, 25 



Eriosoma tessellata. (See Prociphilus tessellata.) 



Fe)iiseca tarquinius, enemy of Prociphilus tessellata 11,18 



Hamamelistes spinosus, food plants 5 



Hippodamia convergens, enemy of Prociphilus tessellata 11 



Hop, alternate food plant of Phorodon humuli 5 



aphis. (See Phorodon humuli.) 



Hormaphis hamamelidis, food plants 5 



Kerosene emulsion against alder blight aphis 26 



Lasius alienus, association with Prociphilus tessellata 11 



Maple (see also Acer). 



silver- leaved. (See Acer eriocarpum. ) 



Monomorium minimum, association with Prociphilus tessellata 11 



minutum^Monomorium minimum 11 



Nabis fusca. (See Pagasafusca.) 



Pagasa fusca, enemy of Prociphilus tessellata 11, 13 



Pemphigus acerifolii, description by Riley 7-8 



=Prociphilus tessellata 5, 6 



alni, description by Provancher 8 



^Prociphilus tessellata 6 



stamineus. (See Aphis stamineus.) 



tessellata= Prociphilus tessellata 6 



Phorodon humidi, food plants 5 



Plum, original food plant of Phorodon humuli 5 



27 



