THE YOUNG NATURALIST. 



Aphides and thevr Food Plants. 



FOOD PLANTS. 



APHIDES 



Wild Lettuce 



Lactuca virosa 



142. Troglodytes, 



Mouse-ear Hawkweed 



Sieracium Pilosella 



it 



Rough Hawk's-beard 



Orepis biennis 



11 



Mug wort 



Artemisia vulgaris 



•1 



and in Ants' nests 



Lasius fuliginosus and 

 Myrmica rubra 



DRYOBIUS 



uaK ^124, 125, 139, 144, 159 



Quercus Ho our 



I43. ROBORIS. 



UdK l > 1 ^4> i ''5> I 3yi i 4ji 



uu, 



I44< v^ROAncus. 



Spruce Fir (66, 1341 *3^> ■'■45) 



Abies ecccelsa 



145. ClSTATUS. 



Gr > TJT7r^"M17TTT? A 

 OL/XllZ/VjlN E* U IyA 





■LIJI WO illUll/UiO 



146. Lanigera. 



(' * Axn6riC3.il Blight.") 



Black Currant Roots 





I47. FODIENS. 



Scotch Fir (133, 135, 136, 160, 162, 166), 





148. FULIGINOSA. 



and other pine trees making small 







white cottony tufts 







Elm (cork-barked; 



TJlmus suberosa 



149. Ulmi. 



Elm (common), causing the leaves to 







blister and curl 



TJImus campestris 



1! 



Elm (common), forming gale-like masses 



do. 



150. Lanuginosa. 



at the ends of the twigs 







Dogwood 



Cornus sanguinea 



151. Corni. 



At the roots of 





PEMPHIGUS 



Wall Hawkweed 



Rieracium murorum 



T K? FlJ^riFRONS 



Shrubby Hawkweed 



Sieracium sabaudum 





Wild Lettuce 



Lactuca virosa 



II 



and a variety of other plants, forming 







cavities in the earth which is lined 







with fiocculent matter produced by 







the Aphis 







Black Poplar 



Populus nigra 



153. Bursarius 



forming galls or pear-shaped purses 





on the leaf-stalks 







Black Poplar 



Pojpulus nigra 



154. SPIROTHECiE. 



causing the leaf- stalks to " flatten and 







and curve into an elastic spiral, the 







edges of which press against each 







other, so as to form a chamber." 







Roots of many plants ; common at the 





155. Lactucarius. 



decaying roots of the garden lettuce 







Elm, galls " embedded in the leaves near 





156. Pallidus. 



the base of the mid-rib, not elevated 







on a foot-stalk " 







