THE MOUNT DESERT EEGION 305 



Cecidomyidae. The Gall Midges 



This family is one of general distribution and the best way 

 is to search for the galls and rear them. It is then far easier 

 to make the identifications. 



Lestremia Macquart 



L. ACERiFOLiA Fclt. S. W. Harbor, June 18, 1921. 



L. DYARi Felt. Bar Harbor, July 22, 1912. 



L. soLiDAGiNis Felt. Bar Harbor, July 22, 1919. 



Catocha Haliday 



C. sp. N. E. Harbor, July 8. 



CORDTIX)MYIA Felt 



C. TUMiDA Felt. N. E. Harbor, July 8 (Minot). 



ASTEROMYIA Felt 



A. CARBONiFEEA Fclt. Commou. An oval black, ocellate 

 blister-gall on the leaves of Solidago. 



Lasioptera Meigen 



L. spiRAEAFOLiA Felt. Bar Harbor. A blister-leaf gall on 

 Spiraea latifolia (meadow sweet). 



Neolasioptera Felt 



N. RAMUscuLA Beutm. Aster stem gall. S. W. Harbor. 

 Fusiform stem galls on asters. 



Rhabdophaga Westwood 



R. BATATAS Walsh. Willow potato-gall. S. W. Harbor ; Salis- 

 bury Cove, Aug. 5 (Sanford). 



R. BRAssicoiDES Walsh. Willow cabbage-gall. Bar Harbor; 

 Salisbury Cove, Aug. 5 (Sanford). 



R. SALiciFOLiA Felt. Spiraea pod-gall. Salisbury Cove; Bar 

 Harbor. 



R. sTROBiLoiDES Walsli. Couc willow-gall. Common, a cone- 

 like gall on willow. 



R. TRiTicoiDES Walsli. Wheat-ear willow-gall. Bar Harbor, 

 July 10. 



