DIPTERA. 75 



C. ocellaris Osten Sacken. Maple Leaf-spot. 



Me. — Mt. Desert. N. H. — Jaffrey, June. Vt. — Bennington, 



June. 

 Mass. — Auburndale; Worcester; Springfield. R. I. — Bristol. 



Conn. — . 



Ocellate, yellow, red-margined blisters on the red maple. 



C. pinirigidae Packard (C. resinicola Aldrich, not Osten Sacken; 



Displosis rigidae Stebbins, 10-7). Pine-needle Gall. 

 Mass. — Springfield (Stebhins). R. I, — . 



Aborted needle-clusters, base globose, on Pinus rigida. 



C. potentillaecaulis Stebbins, 10-37. 

 Mass. — Springfield, Sept. (Stebbins). 



An enlarged internodal stem-gall on Potentilla canadensis. 



C. pudibunda Osten Sacken. 



N. H. — Hanover, July. 



Mass. — Worcester, June (Thofnpson) ; Springfield (Stebbins). 



Folds between the larger veins of the hornbeam, Carpinus 

 caroliniana. 



C. racemi Stebbins, 10-39. 



Mass. — Springfield, July (Stebbins). 



An elliptical swelling of the axis of the raceme of chokecherry. 



C. reniformis Stebbins, 10-36. 

 Mass. — Springfield (Stebbins). 



A reniform gall at the base of the petiole of the wild strawberry. 



C. serotinae Osten Sacken. Wild-cherry Bud-gall. 



Mass.- — ^Springfield (Stebbins); Worcester. R. I. — Providence 



(Thompson) . 



Club-shaped enlargement of terminal bud of Prunus serotina. 



C. squamulicola Stebbins, 10-16. Hazel-catkin Gall. 

 Mass. — -Springfield (Stebbins). 



A gall which deforms the sterile catkin, causing it to be twice 

 or thrice its normal size. 



C. tuba Stebbins, 10-46. 

 Mass. — Springfield (>S^e66ms) . 



A hemispherical gall on the leaves of Cornus amomum. 



C. verrucicola Osten Sacken. Basswood Wart-gall. 



Mass. — Cohasset; Worcester (Thompson); Springfield (Stebbins). 



Conn. — . 



Rounded wart-like gall on the leaves of the linden, Tilia 

 americana. 



