Mr. F. Walker's Descriptions of Aphides. 



19 



Arctium Lappa. 

 Solatium. 

 Scabiosa. 

 Inula dysenterica. 

 Carduus lanceolatus. 

 Eryngium campestre. 

 Fumaria officinalis. 

 Cochlearia Armoracia. 

 Capsella bursa-pastoris. 

 Lycopersicum esculentum. 

 Brassica Rapa. 

 Erodium cicutarium. 

 Lotus corniculatus. 

 Faba vulgaris. 

 Pisum sativum. 

 Phaseolus vulgaris. 



coccineus. 

 Ononis. 



Spinacia oleracea. 

 Vicia. 



Mentha hirsuta. 

 Cracca. 



Lamium purpureum. 

 Digitalis purpurea. 

 Cnicus arvensis. 



palustris. 

 Anthriscus. 

 iEgopodium. 

 jEthusa. 

 Galium Aparine. 



verum. 



Mollugo. 

 Achillaea Ptarmica. 

 Nerium Oleander. 

 Atriplex hastata. 



Chenopodium album. 

 Senecio vulgaris. 

 Arctium minus. 

 Valeriana officinalis. 

 Hypericum perforatum. 



hirsutum. 



quadrangulare. 

 Scorzonera. 

 Datura Stramonium. 

 Cichorium Endivia. 

 Lactuca. 



Matricai'ia Chamomilla. 

 Chrysanthemum segetum. 



leucanthemum. 

 Helichrysum chrysanthemum. 

 Beta vulgaris. 

 Cytisus Laburnum. 

 Genista tinctoria. 



anglica. 

 Ulex europaeus. 

 Asparagus officinalis. 

 Sium latifolium. 

 Dahlia superflua. 



frustrania. 

 Polygonum Persicaria. 

 Myosotis scorpioides. 

 Solidago virgaurea. 

 Pastinaca sativa. 

 Daucus Carota. 

 Anagallis arvensis. 

 Angelica sylvestris. 

 Verbena. 

 Persicaria. 

 Urtica urens. 

 Viburnum Opulus, &c. &c. 



The winged race migrate to the bean in May, and then bring 

 forth their offspring, which at the end of June leave the withered 

 flowers, and fix themselves along the sutures of the pods where 

 their mouths can find an entrance. 



The viviparous wingless female. When young it is linear, and 

 dark red : the limbs are paler : when full-grown it is oval, con- 

 vex, plump, and dull black, and has a row of punctures on each 

 side : the feelers are white with black tips, and much shorter than 

 the body j the fourth joint is much shorter than the third ; the 

 fifth is hardly shorter than the fourth ; the sixth is about half the 

 length of the fifth ; the seventh is full as long as the third ; the 

 mouth is white with a black tip : the nectaries are as long as one- 

 eighth of the body : the legs are white j the hind-thighs excepting 

 the base, the knees, the feet, and the tips of the shanks, are 

 black. 



1st var. The body is dark green. 



2nd var. The body is purplish black. 



2* 



