THE MOUNT DESERT REGION 307 



CoNTARiNiA Eondani 



C. CANADENSIS Felt. Ash-midrib gall. Bar Harbor, June. 



C. viRGiNiANAE Felt. Choke-cherry midge. Salisbury Cove. 

 This midge causes swollen deformed fruit on the choke- 

 cherry. 



C. spiRAEiNA Felt. Spiraea cabbage-gall. S. W. Harbor. A 

 terminal cabbage-like bud-gall. 



Mycodiplosis Riibsaamen 



M. popuLiFOLiA Felt. Salisbury Cove; Bar Harbor, Aug. 

 Bullet-like swelling at the base of poplar leaves. 



Obolodiplosis Felt 



0. ROBiNiAE Hald. Locust-leaf midge. Salisbury Cove, July 

 14. Forming rolled leaf -margins on locust {Robinia pseudo- 

 acacia). 



Retinodiplopsis Kieffer 



R. iNOPis O. S. Bred from Pinus rigida twigs (Br.). 



Cecidomyia Meigen (Itonida Meigen) 



C. NivEipiLA 0. S. 'Oak fold gall.' Salisbury Cove, Aug. An 



irregular white pubescent gall on the under side of the leaf, 



with a fold on the upper side. 

 C. ocELLARis 0. S. 'Maple leaf -spot.' Common. A yellow 



red margined blister leaf-gall. 

 C. PELLEX 0. S. Ash bullet gall. Bar Harbor. Round red 



gall on the midrib. 

 C. sALiciFOLiAE 0. S. Edcu, Aug. Leaves of Spiraea near 



summit of stem are aborted and transformed into pouches 



with a little of blade remaining. 

 C. sp.? Toothed purse gall. Common. A flattened pouch 



gall on the leaves on the shadbush (Amelancliier) . 



Tbishormomyia Kieffer 



T. CANADENSIS Fclt. 'Juiic-berry lipped gall.' S. W. Harbor; 

 Bar Harbor, June. A truncated red-lipped gall on the shad- 

 bush (Amelanchier canadensis). 



