XO. G4] DIPTEI5A OF COXXECTICUT : TAXONOMY 293 



more rediicod venation of the reniainini;" Jiiembers of the subfamily. 

 In all of these, vein ^1 + 2 is completel^^ atrophied and vein J?i merges 

 jjradiially into R2, effecting the illusion of a long backward fusion 

 of the anterior branches of R (Fig. 33, F). The missing branch of 

 M is J/3. The free tip of vein Sc2 is preserved in all local species 

 but the actual tip of Sci is atrophied. The antennae (Fig. 83, A) are 

 16-segmented, with a structure and appearance that is much as in 

 Tipida^ the segments being relatively short, with conspicuous basal 

 verticils. 



The adult flies are very sluggish in their habits. The larvae 

 are aquatic or nearly so. living and feeding on submerged mosses 

 and seed plants in bogs or similar places. 



Key to Species 



1. Ru2 entirely preserved (Fig. 33, E) neoxena 



Ru2 atrophied (Fig. 33, F) . . . / tipulina 



Phalacrocera neoxena Alex. (Fig. 33, E). 



191:t. Phalacrocera neoxena Alexander: Proc. Acad. Nat. Sci. Phila- 

 delphia, 1914: 603-604. 



Figs.— Alexander, Ih'id., pi. 25, fig. 10 (wing) ; 1914. Alexander, Cfls. N. Y., 

 1, pi. 30. fig. 9 (wing) : 1919. Alexander, Gen. Ins., Fasc. 187, pi. 2, fig. 6 (wing) ; 

 1927. 



General coloration dark brown, heavily pruinose, the three prae- 

 scutal stripes darker gray. Femoral tips insensibly darkened. Wings 

 very strongly suffused with brown; venation (Fig. 33. E) variable, 

 ■r-iii present or lost bv fusion of adjoining veins. 5 . Tj. 11.8 - 12 mm. ; 

 w. 10 . 4 - 11 mm. 2 '. L. 11 . 8 mm. ; w. 10 .9-11.9 mm. 



(AIa3^, June) Ont., Que., N. Y., Pa., westw. to Mich. 



P. tipulina O. S. (Fig. 33, A, F). 



1865. Phalacrocera fqmllna Osten Sacken; Proc. Ent. Soc. Phila- 

 delphia, 4:241. 



Figs.— Needham, 23rd Rept. N. Y. St. Ent. for 1907, pi. 11, fig. 2 (wing) 

 1908. Alexander, Proc. Acad. Nat. Sci. Philadelpln'a, 1914, pi. 25, fig. 11 (wing) 

 1914. Alexander, Cfls. N. Y.. 1, pi. 30, fig. 8 (wmg), text-fig. 125, J (ant. $) 

 1919. Dickinson, Cfls. Wise, p. 210, fig. 112 (wing) ; 1932. 



Praescutal stripes not well-defined against the dark ground of 

 the notum. Antennae dark, only the base of scape pale. Femoral 

 tips abruptly blackened. Wings " grayish broAvn, the stigma distinct; 

 venation (Fig. 33, F) variable, in cases the element closing cell 1st .¥0 

 (i.e., m plus basal section of J/3) lies distad, connecting vein M>. 

 beyond the fork of i/1+2; .^2+3 angulated and almost invariably 

 spurred at proximal end of stigma. Abdominal tergites brown, 

 broadly margined with brownish black. $. L. 11-13 mm.; w. 

 8.5-10 mm. 2. L. 14-15 mm.; w. 10-11.5 mm. 



(Late May-early Aug.) Ont., Que., Me., N. H.. Yt., Mass., N. Y., Pa., westw. to 



Mich, and Wise; (in sphagnum bogs). 



Connecticut.— Manitic Lake, June 8-9, 1929 (C. P. A.); Putnam, June 15. 1933 



(C.P.A.). 



