536 PROCEEDINGS OF THE ACADEMY OF [Oct., 



sisted of the dominant palmetto (Sabal Palmetto (Walt) R. & S.), 

 live oak, Quercus virginiana, heavily draped with Spanish moss, 

 Tillandsia, and the coast white cedar, Chamcecyparis thuyoides. The 

 shrubbery consisted of a mixed growth of Myrica carolinensis> 

 common; Ilex vomitoria, several; Callicarpa americana, abundant, 

 and two shrubby Composites, Iva frutescens and Borrichia frutescens r 

 common. The undergrowth from which the Tipulids were swept 

 consisted of great beds of Polygonum punctatum, with a more sparse 

 admixture of spike grass, Distichlis spicata; Hydrocotyle umbellata; 

 and the Verbenaceous plants, Lippia nodiflora and Verbena 

 caroliniana. u 



The Tipulidse of the above floral association showed a strong 

 Floridian tendency, the associates of Polymera being as follows: 



Dicranomyia distans, abundant; D. floridana, rare; Teucholabis 

 carolinensis, rare; Gonomyia (Leiponeura) puer, rare; G. (Gonomyella) 

 slossonce, several; Erioptera {Mesocyphona) parva, abundant, and 

 Brachypremna dispellens, common. 



Tribe Pedicini. 



TRICYPHONA Zetterstedt. 



1838. Tricyphona Zetterstedt; Insecta Lapponica, Dittera, p. Sol. 

 This genus, like the tribe Pedicini in general, has a northern 

 distribution throughout the world. There are seven species now 

 known in the eastern United States which may be summarized as 

 follows : 



Tricyphona inconstans Osten Sacken. (Plate XXVIII. fig. 47.) 



Canadian and Transitional-Canadian zones of the eastern United 

 States and Canada. One of our commonest and best-known crane- 

 flies, ranging from Ontario, Quebec and Newfoundland south (in the 

 mountains) to Georgia and west to Michigan. It is also recorded 

 from Europe, but a very careful comparison with abundant material 

 and a critical study of the male hypopygium must be made before 

 these records can.be finally accepted. The fly is abundant in swamps 

 and low swales. In New York and New England it is on the wing 

 from May 12 to September 28, while in the vicinity of Washington 

 it appears even earlier (Great Falls, Virginia, April 20, 1913 (Knab)). 



Tricyphona calcar Osten Sacken. (Plate XXVIII, fig. 48.) 



Canadian life-zone of northeastern America, ranging from the 

 Hudsons Bay region, Ontario and Quebec south (in the mountains) 



14 I am indebted to Mr. W. L. McAtee, of the United States Biological Survey,, 

 for his kindness in determining many of the above-listed plants. 



