432 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Subfamily Cylindrotominae. 



Genus LIOGMA Osten Sacken. 



*L10GMA NODICORNIS Osten Sacken, var. FLAVEOLA Alexander. 



Great Falls, Virginia, May 22, Nathan Banks; May 23, 1918, in 

 copula, McAtee; Falls Church, Virginia, June 7, Nathan Banks; 

 Glencarlyn, Virginia, June 11, 1911, F. Knab; June 1, 1919, Mary- 

 land; near Plummers Island, June 2, 1916; Beltsville, Maryland, 

 June 18, 1916, McAtee. The present species is the only member of 

 the interesting group Cylindrotominae as yet found in the region 

 under consideration. The local specimens represent a variety which 

 is much more yellow than the typical northern L. nodicomis. The 

 immature stages of species of this genus are terrestrial, living in 

 cushions of mosses of the genus Hypnum and related forms. 



RECENT SYNONYMY. 



Certain names applied to species of crane-flies that have been re- 

 corded from the District of Columbia region are omitted from this 

 paper. In each case, however, these names are synonyms of others 

 which are here recorded. Synonyms that have been known for many 

 years may be consulted in Aldrich's Catalogue.' The more recent 

 synonymy is herewith listed : 



*Dicranomyia curvivena Coquillett =Gonomyia manca Osten Sacken. 

 Erioptera dulcis Osten Sacken=jK. needhami Alexander. 



(eastern records only) 

 Erioptera chlorophylla Osten Sacken=J?. furcifer Alexander, 

 (in part) 



' J. M. Aldrich, A catalogue of the North American Diptera, 1905. 



