1916.] NATURAL SCIENCES OF PHILADELPHIA. 497 



tains, to North Carolina. In New York and New England it flies 

 from June 21 to August 8, being quite common in late June and 

 throughout July on vegetation in cool wooded places, usually along 

 streams. 



Dicranoptyoha nigripes Osten Sacken. 



Known only from the type-locality, Dalton, Georgia. 



Dicranoptycha sobrina Osten Sacken. (Plate XXV, fig. 11.) 



Transitional and Austral life-zones, wide-ranging throughout 

 the northern portions of the United States, from Ontario and 

 New York, south to North Carolina, west to British Columbia, 

 California and New Mexico. In the vicinity of Washington it flies 

 from April 20 to August 31, while in the northeastern part of its 

 range (New York and Ontario) it appears even later, August 30 to 

 September 20. 



Dicranoptycha winnemana sp. n. (Plate XXV, fig. 12.) 



Transitional life-zone, ranging from Maryland to Georgia. 



Elephantomyia westwoodi Osten Sacken. 



Canadian and Canadian-Transitional life-zones of northeastern 

 United States and eastern Canada, ranging from Ontario, Quebec, 

 and Nova Scotia, south to North Carolina, west to Wisconsin. In 

 New York and New England it flies from June 5 to August 13, being 

 ■common throughout late June and July. 



Rhamphidia albitarsis Osten Sacken. 



Tropical life-zone, ranging from Santo Domingo, through the 

 Antilles to St. Vincent and British Guiana; also in Central America. 

 It may possibly occur in the Miami section of Florida. 



Rhamphidia flavipes Macquart. (Plate XXV, fig. 13.) 



Wide-ranging throughout the eastern parts of North America, 

 from Ontario, and Quebec south to Georgia and Florida, west to 

 Manitoba, Wisconsin, Missouri and Texas. In New York and 

 New England, it flies from May 29 to August 29; in the southern 

 parts of its range much earlier (Florida, March 14; Texas, March 18). 



Rhamphidia mainensis sp. n. (Plate XXV, fig. 14.) 



Canadian-Transitional life-zone of the northeastern United States, 

 ranging from Maine to Maryland, west to Illinois. 



Teucholabis carolinensis Alexander. 



Lower Austral life-zone, known only from the type-locality, 

 Georgetown, South Carolina, August 19, 1915. 



