Camellia (Camellia)-Black citrus aphid

Toxoptera aurantii

See:

Pest description and crop damage Small black aphid on new growth or on winter buds. Infestations may be severe in any season and are often a problem on plants growing in protected places.

For more information

Johnson, W.T. and H.H. Lyon (1991), Insects That Feed on Trees and Shrubs, 2nd ed., Cornell University Press (p. 302).