Cecidomyiidae

Cecidomyia

Aristolochia macrophylla

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Massachusetts

Michigan

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Cecidomyia hageni

*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.

Entomological notes

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

Key to American Insect Galls

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). 

The plant-feeding gall midges of North America