THE MOUNT DESERT REGION 1)7)7) 



Oligothrophus Latreillc 



0. sp. Long Pond, June 20. 



Rhopalomyia Riibsaamen 



R. lanceolata Felt. Bred ex Solidago gall (Br.), Sept. 18, 



Asphondylia Loew 



A. antennariae Wheeler. Everlasting-bud gall. Bar Harbor, 

 Aug. 15. Corn-shaped bud gall on everlasting (Antennaria 

 plant agini folia). 



ClNCTICOBNIA Felt 



C. magalis 0. S. Oak-vein gall. Bar Harbor. A vein gall 



on the leaves of the red oak. 

 C. piluioAe Walsh. Oak-pill gall. Bar Harbor; Penikese. 



Round, hard, rough galls on the leaves of the red oak. 



Contarinia Rondani 



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



C. virginianiae 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.). 



