208 TRANSACTIONS OF THE ILLINOIS 



A LIST OF THE SPECIES OF PLANT-LICE MENTIONED, WITH THE NAMES OF THE 

 PLANTS THEY INFEST. THE GENERA ARE ARRANGED SYSTEMATICALLY, BUT 

 THE SPECIES ALPHABETICALLY, UNDER THEIR RESPECTIVE GENERA. 



9 

 lo 

 II 



12 



13 

 14 



15 

 16 



17 



18 

 19 

 20 

 21 



22 



23 

 24 



25 

 26 

 27 

 28 



29 

 '30 

 31 



32 



33 

 34 

 35 

 36 

 37 

 38 



39 

 40 



41 



42 

 43 

 44 



45 

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47 

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49 

 50 



Diraphia calamorum. Calamus (Sweet-flag), 

 feinoralis. Pine leaves, 

 maculipennis. Calamus (Sweet-flag), 

 veinalis. Pine leaves. 

 Psylla ? Alder. 



annulata. Sugar maple 



? Birch. 



carpini. Hornbeam. 



? Hackberry, forming galls. 



pyri. Pear, leaves and twigs. 



quadrelineata. Unknown. 



quadrisignata. " 



rubi. Blackberry, suckers and shoots. 

 . trilineata. Unknown. 



urticjecolens. Nettle. 

 Aphis aceris. (Aceris pennsylvanica). 



amygdali. Peach and Almond, leaves. 



asclepiadis. Silkweed, leaves. 



berberidis. Berberry, leaves. 



betuiascolens. Birch. 



brassicas. Cabbage, Kale and Turnip. 



candicans. Balm of Gilead, leaves. 



caryella. Hickory, leaves. 



cerasi. Cherry, leaves and twigs. 



cerasicolens. Black cherry. 



circezandis. Galium. 



cornifoli?e. Dogwood, leaves. 



crata;gifolipe. Thorn, leaves. 



dauci. Carrot, umbels. 



fumipennella. Hickory, leaves. 



maculella. Hickory, leaves. 



maidis. Corn, ear stalks and roots. 



mali. Apple, leaves and twigs. 



malifolire. Apple, leaves. 



marginella. Hickory, leaves. 



pastinacefe. Parsnip. 



persicae. Peach, leaves. 



pinicolens. Pine. 



polygoni. Knotweed. 



populifolia\ (Populus grandidentata,) leaves. 



prunifolise. Plum, leaves. 



punctatella. Hickory, leaves. 



rudbeckioe. Golden-rod and Rudbeckia, stalks. 



rumicis. Bean, Sorrel, Burning-bush, Poppy, Pig-weed, Shepherd's-purse, 

 Dahlia. 



sambucifolise. Elder, leaves. 



viburni. High cranberry, fruit stalks. 

 Phopalosiphum ribis. Currant, leaves. 

 Siphonophora absinthii. Tansy and other aromatic herbs. 

 avenK. Wheat, Oats, Rye, Barley. 

 fragariK. Strawberry plants. 



