J. Davidson 125 



14. 7. 13. A few individuals present. 



24. 7. 13. A few small colonics present on one young leaf, numbers few, four fat, 



healthy apterous females. 

 28. 7. 13. Aphids few in number ; no winged females yet. 



Plant No. 11. Sugar Beet. 



Infected from Uumex No. 2 with eight w. v. $'s. 



Plant has wilted owing to lack of water ; a few young aphids present. 



Reinfected this plant with five w. v,. $'s from Rumex. 



One colony going well beneath one young leaf, the individuals being 



healthy ; a few individuals also present on the older leaves. 

 About 30 individuals present, collected chiefly on the underside of the 



leaves, along the veins. 

 Aphids chiefly collected on one young leaf, which is curled, but a few 



colonies on the older leaves. Winged forms produced, and nymphs 



of winged $'s present. 

 30. 7. 13, Aphids look healthy, but numbers up to the present are small. 



Plant No. 12. Onions. 



27. 6. 13. Infected from Broad Beans No. 4 with five w. v. $'s. 

 8. 7. 13. No aphids present, have left the plants and died. 



Plant No. 13. Red Beet. 



Infected from Broad Beans No. 4 with five w. v. $'s. 



A few aphids produced. 



One winged mother alive, but not many individuals produced, so rein- 

 fected with five w. v. $'s from Broad Beans No. 4. 



A few small colonies formed on the young leaves. 



Several big healthy apterous females present beneath the young leaves ; 

 a few nymphs of winged viviparous females produced. 



Infection heavier than in case of No. 9, but numbers not great ; winged 

 forms produced. 



Plant No. 14. Shirley Poppies. 



27. 6. 13. Infected from Broad Beans No. 4 with eight w. v. $'s. 



28. 6. 13. Several aphids produced. 



8. 7. 1 3. Several colonies going well beneath leaves, on the veins : also a few 



individuals on the flower-stalks. 

 14. 7. 13. Poppies in flower ; several colonies present beneath the leaves, and on the 



flower- stalks. 

 22. 7. 13. Winged viviparous females produced. 



24. 7. 13. A fair number of aphids present, distributed along stems and flower- 

 stalks ; winged viviparous females present. 

 28. 7. 13. Many winged forms produced ; infestation is moderately heavy. 



9—2 



