J. Davidson 127 



The following plants were also infested as follows. 



Plant No. 20. Broad Beans. 



2. 6. 13. Iiifected from a Euonymus tree growing in Acton Lodge garden with 



four w. V. $'s. 

 24. 6. 13. Many aphids now going well on the plants, along upper half of stem, 



and some along mid-ribs beneath leaves. 

 26. G. 13. Winged females produced. 

 28. 6. 13. Aphids heavily infesting the plants along the stems. Many winged 



forms present, which are walking over the muslin bag as though 



wanting to escape. 

 8. 7. 13. Plants heavily infested ; very many winged forms crowdmg on the muslin 



cover. 

 14. 7. 13. Bean plants almost dead ; leaves curled and brown ; many aphids 



dead. 

 24. 7. 13. Plants dead ; all the aphids dead. 



Plant No. 21. Shirley Poppies. 



4. C. 13. Infected from Euonymus tree growing in Acton Lodge garden with 



four w. V. $'s. 

 Several apterous forms present beneath the leaves. 

 Several colonies present on the stem and leaves, along the mid-ribs ; 



aphids big and healthy. 

 Aphids fairly numerous, along flower-stalks and beneath the leaves. 

 Winged viviparous females produced. 

 Many winged forms produced ; Poppies in flower ; several colonies 



going well. 

 Infestation moderate ; aphids dying off ; plants sickly. 

 Poppies looking very sickly ; aphids nearly all dead. The soil used was 



poor and plants did not do well. 

 Plants dead. 



Plant No. 22. Onions. 



Infected from Rumex No. 1 with eight w. v. $'s. 

 No aphids present ; have died off. 



Plant No. 23. Red Beet. 



Infected from Rumex No. 1 with eight w. v. $'s. These plants were 

 grown in the open garden, and at the time of infection were covered 

 with a muslin cage. Although I searched carefully and found no 

 aphids on the plants, one could not be absolutely certain that some 

 individuals from the neighbouring infected Beans had not infected 

 them. The plants in the pots did not, generally speaking, grow as 

 healthily as those in the open garden, and I wanted to see the effect 

 on these plants which were growing well. Soon after infecting them 

 the winged forms made their way up to the top of the muslin bag, 

 but a day or so after they seemed to settle on the plants. 



