d. Cluster of needles webbed together in characteristic fashion by the

Infested apple tree which has lost much foliage from the attacks of the mite.

b. Eggs on calyx end of apple, and on twig, three times enlarged; insert, same from twig, enlarged about ten times.

EUROPEAN RED MITE.

b. Cocoon on under surface of apple leaf, twice natural size.

APPLE AND THORN SKELETONIZER.

b. Adult, known as the black swallow-tail butterfly; female, natural size.

CELERY CATERPILLAR.