84 



Indian Economic Entomology. 



[Vol. XL 



From Mr. E. Gieea were received in February 1890 specimens of 



an Aphid which is said to attack young 



Ceylon Tea AphicL ^^^ ^^^^^ .^ Qey\oxi, sometimes doing 



Geyloniaj Thaecolaij 

 considerahle injury. According to Mr. Green*s account, published in the 

 Ceylon Independent newspaper, both the winged and wingless forms 

 are found in great numbers on the young succulent shoots in nurseries, 

 and the irritation which they set up causes the edges of the leaves to 

 curl and become distorted. The life history of the insect has not as 

 yet been completely traced, but Mr. Green has observed that both the 

 winged and wingless forms reproduce themselves parthenogenetieally, 

 the young settling down beside the mother and becoming full grown 

 in about ten or twelve days after they are born. Honeydew is secreted 

 in the usual way by glands on the dorsal surface of the abdomen, and the 

 insect is consequently attended by ants. It is devoured by the larvae of 

 Syrphidse, Hemeiobidae, and Coccinellidse, besides being parasitized by a 

 minute Ichneumonid, and the combined effect of these insects is so consider- 

 able that the Aphid is often completely kept in check by them. Wood 

 ashes, powdei'ed sulphur, and dry carbolic powder, have all been found 



