J. Davidson 



188 



13. 6. 13. Scarlet Runner Beans 



13. 6. 13. 

 13. 6. 13. 



Spinach. 

 Red Beet 



13. 6. 13. Onions 



23. a. 13. Red Beet 



3. 7. 13. Scarlet Runner Beans 



4. 7. 13. Asparagus 



4. 7. 13. Capsella bnrsa-pastoris 



4. 7. 13. Chenopodium album . . 



Aphis rnmicis forming colonies on the tips of the 

 young .shoot.s, and a few colonics beneath the 

 young leaves. 

 A few plants near the infested Broad Beans are now 



fairly heavily infested. 

 A plot of Red Beet plants near the Broad Beans have 

 now several colonies on them, and some of the 

 leaves are crinkled along the veins which is pro- 

 bably due to tlie presence of the aphis. The 

 colonies are ft)rming along the veins beneath the 

 leaves, but only a few leaves infected. Another 

 plot of Red Beet at some distance from the Broad 

 Beans is not infected. 

 A few individuals are present on a few plants ; they 

 seem to wander to the top of the leaves. Found a 

 few lice produced on the.se plants, but in a few 

 days the aphids disappeared from the plants. 

 Several plants infected. The aphids have collected 

 chiefly on tlie very young leaves, near tlie base 

 of the mid-rib, and along the veins. These plants 

 are however only slightly infected. 

 Only a few aphids present on these plants. 

 A very few leaves with one or two small colonies 



present. 

 These plants are now growing tall, and .several 

 colonies of aphids are present along the young 

 parts of the stems. 

 A few small colonies present on the young terminal 



shoots. 

 A few of the plants in a large plot of thistles are 



heavily infested along the stems. 

 A few individuals generally distributed over these 

 plants, but the aphids do not seem to be forming 

 colonies. 

 Several plants fairly heavily infected, the aphids 

 forming colonies on the young terminal shoots, 

 and some along the mid -ribs beneath the leaves. 

 There are several small colonies present on the 

 leaves of the Dwarf French Beans. 

 The.se plants have now grown big and bushy, and 

 many colonies of Aphis rumicis are present on 

 them ; nymphs of winged females are produced. 

 Several Shepheid's purse plants are infected, the 

 colonies forming along the apex of the stems at 

 the base of the flower-stalks. 

 There are many small Chenopodium plants fairly 

 heavily infested. The colonies are present chiefly 

 along the veins of the leaves, which make the 

 leaves curl. Several nymphs of winged females 

 produced. 



