210 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [Bull. 



free tip of S(-2 is carried distad of the level of B2, as is common in 

 the Limoniini. Most of the species in our region are ver}^ similar in 

 general appearance and are most readily separated by characters of 

 the male hypopygiiim. 



The adults are among the best-known of local flies, being found 

 in small dancing groups in darkened shady places, as in shaded spots 

 in woods, beneath culverts and bridges, in outhouses, in crannies and 

 caverns of shaded cliffs, beneath overhanging boulders, in the shade 

 of uprooted shallow tree roots, and numerous other similar situations. 

 When not engaged in a characteristic vertical dance, they hang from 

 the roof of their haunts by the fore legs, the posterior pair hanging 

 pendant. The larvae live in moss cushions, often in dry situations. 



Key to Subgenera 



1. Wings with cell 1st M-2 open by atrophy of basal section of vein Ms (Fig. 



24, A) Dolichopeza: Dolichopeza 



Wings with cell 1st M-, closed (Fig. 24, B) Dolichopeza: Oropeza 



Subgenus Dolichopeza Curtis 



-Dolichopeza (Dolichopeza) americana Ndm. (Fig. 24, A). 

 1908. Dolichopeza americana Needham; 23rd Rept. N. Y. St. Ent. 

 for 1907 : 211. 



Figs.—Needham, Ibid., pi. 16, fig. 5 (ven.). Alexander, Cfls. N. Y., 1, pi. 43. 

 fig. 187 (wing) ; 1919. 



Praescutum wdth three brown stripes, the lateral pair and areas 

 on scutal lobes darker. Pleura yellow, variegated with brown area. 

 Legs brown, the tips of basitarsi and all succeeding tarsal segments 

 snowy white. ' 5 . L. 8 - 9 mm. ; w. 10 - 10.5 mm. 5 . L. 8.5-9 mm. : 

 w. 9.5-10 mm. 



(June, July) Labr.. Ont., Que., N. B., Me., N. H., Vt.. Mass., N. Y., N. J., Pa., 

 Ohio, Ind., Mich., southw. to Tenn., S. C. and Ga. 



Connecticut— E. Hartland, June 8, 1929 (C P. A.): Flartford, June 12, 1931 

 (C. P.A.); Hartland, June 9, 1929 (C.P.A.); Kent Falls, June 12 - 13, 1931 

 (C.P.A.); Norfolk, June 9, 1929 (G. C. C.) ; Riverton, June 12, 1931 (CP.A.): 



Tunxis State Park, June 12, 1931 (C. P.A.); Union, June 14, 1933 (C.P.A.): 



W. Granby, June 8, 1929 (G. C. C). 



Subgenus Oropeza ISTeedham 

 1908. Oropeza Needham; 23rd Kept. N. Y. St. Ent. for 1907: 211. 



Key to Species (based on male charaelcrs) 



1. Tarsi snowy white 9 



Tarsi dark brown, brown or yellowisli 3 



2. Male !iypopygium with the outer dististyle shorlL-V tiian the inner diVtistvle: 



gonapophysis appearing as a flattened blade provided with delicate setulae 



the apex an acute glabrous point. (Fig. 26, A) carol us 



Male liypopygium with the outer dististVle longer than' tiie'innt'r ■" ^ona- 

 pophyses appearmg as divergent lobes that are set with abundant black- 

 ened spuies and setae. (Fig. 26, H) subalbipes 



