[Craneiobia] tuba. USA (Iowa, Illinois, Pennsylvania, New York, Massachusetts). Cornus amomum; C. drummondii (Cornaceae).
Cecidomyia tuba Stebbins 1910: 46. USA: Massachusetts, vic. Springfield; T; G; NHSM.

Leaf gall on underside, tubular, with swollen base and cleft tip, not unlike a kettle-spout. Bright red and finely pubescent like underside of leaf. 1-2 x 5-S mm. Very rare.

On leaf of Cornus amomum. Hemispherical above, about 3 mm. in diameter, projecting like a curved tube beneath, about 8 mm., open at end. Light green below, red-brown above. Bright orange larva. Three galls on each leaf.

...produces a tubular leaf gall on Cornus sericea ... which first appears in early June.

Craneiobia tuba

Tubular leaf gall
Green to pinkish, monothalamous galls
Hemispherical on one side of the leaf, tubular on the other
Orange larvae in a spherical cell

Hosts: Cornus amomum, Cornus racemosa

Distr: Massachusetts, New York and Illinois