Leaf blister..."Cecidomyia" hageni Aldrich

This species is known only from a description of its damage and from the larvae being brick red and agile. The circular blisters are about 4 mm in diameter on leaf blades, but are larger on petioles. Full-grown larvae escape through a hole in the upper surface of the blister. Host: A. macrophylla. Distr.: Massachusetts. Ref.: Hagen (1881).

Cecidomyia spec. on Aristolochia sipho [A. macrophylla].
Flat rounded galls on the under side of the leaves, pale, somewhat transparent, pale greenish, 4 mil. diam. On the upper side of the leaf the gall becomes a slightly elevated disk marked with dark red and having in the middle a small pale-bordered hole. The galls grow larger and more globular on the stems of the leaves, to globes of 8 mil. diam., some more elongated, 18 mil. long and 8 mil. broad.

Itonid. Cecidomyia hageni Aldr. Small, woolly capsule on under surface of the leaf, on A. macrophylla