J. Davidson 123 



8. 7. 13. Plants fairly heavily infested ; many winged forms gathered at the top 



of the muslin cover. 

 14. 7. 13. Infestation heavy ; many winged forms crowding in vast numbers on 



the top of the muslin cover. 

 24. 7. 13. Plant smothered with aphids ; many dead ; plants very sickly, leaves 



curled and of a dirty brownish colour. 



Plant No. 4. Broad Beans. 



27. 5. 13. Infected from Rumex No. 1, with four w. v. $'s. 



31. 5. 13. Only a very few aphids produced, winged mothers dead. Reinfected 



with five w. V. $'s from Rumex No. 1. 

 Note, It is possible that the w. v, $'s taken from the Rumex were old, 



and had already laid a number of lice on that plant. 

 24. 6. 13. Many aphids present which are collected along the upper part of the 



stem. Winged viviparous females present. 

 28.6. 13. Aphids numerous along upper part of stem. Many winged forms present, 



some settled beneath the leaves, but many collected in the top of 



the muslin cover as though wanting to migrate. 

 8. 7. 13. Heavily infested, great numbers of winged forms collected in top of 



muslin cover, aphids distributed aU over the stem, and beneath the 



leaves. 

 24. 7. 13. Plants smothered with aphids ; many winged forms dead ; plants look 



sickly. 



Plant No. 5. Rumex sanguineus. 



31. 5. 13. Infected from Rumex No. 1, with four w. v. $'s. 



18. 6. 13. Many colonies going on this plant, but it became diseased, and the leaves 

 died, so the aphids were transferred to another Rumex plant. 



Plant No. 6. Shirley Poppies, 



4. 6. 13. Infected from Euonymus B with four w. v. $'s. 



18. 6. 13. Several apterous viviparous females present, and one fairly large colony. 

 24. 6. 13. Several small colonies produced, but reproduction seems slow in numbers. 

 30. 6. 13. A few small colonies present beneath the leaves and on the stem, but 

 numbers small. 

 8. 7. 13. A faii-ly good number of aphids present, along the mid-rib of leaves and 

 on the stem, and flower stalks. 

 24. 7. 13. A good number of aphids distributed generally over the plants, which 

 look sickly, and flowers almost over ; several winged forms produced. 

 28. 7. 13. Many winged forms present ; plants fairly heavily infested. 



Ann. Biol. I 9 



