No. 64] DIPTERA OF CONNECTICI^T : TAXONOMY 381 



areas at origin of Rs, along cord, outer end of cell Jsf M-, and wing- 

 tip : cell ^H short-petiolate; m-cu subequal to or longer than the distal 

 section of Ou^. Abdomen ( S ) bicoloroiis, black, the intermediate seg- 

 ments ringed basally with obscure yellow; hypopygiuni yellow; in 

 female, abdomen more uniformly blackened. $. L. T-8 mm.; w. 

 T.5-8 mm. 9 . L. 10-11 mm. ; w. 8.5-9 mm. 



(May-Aug.) Ont., Que., N. B., Mc, N. H., Vt., Mass., R. I., N. Y., Pa., westw. 

 to Mich, and 111., southw to Ga. and Tenn., in s. Ga. and Fla. replaced by the sub- 

 species stiff usa Alex., with more heavily patterned wings. A common species, usually 

 in swampy or marshy places. 



Connecticut.— Granbv, June 8, 1929 (C.P. A.); High Ridee, July 18. 1915 ((..P. 

 E.); Natchaug State Forest. June 14, 1933 (C.P. A.): New Haven, May 26, 1904 

 (H. L.V.); Norfolk, July 24, 1931 (C. P. A.); Phoenixville, June 14. 1933 (C. 

 P. A.). 



L. {Laslomastix) subtenuicornis (Alex.) (Fig. 4:3. K). 



1918. LaMomastid- suhtennicornis Alexander; Can. Ent., 50:61-62. 



General coloration gray to brownish gray, the praescutum with 

 three broad, slightly darker brown stripes. Antennae ( S ) with flagel- 

 lar segments subcylindrical to long-fusiform, the verticils and pubes- 

 * cence short; in 9 antennae shorter, extending about to base of abdo- 

 men. Wings with cell R^ sessile to very short-petiolate. $ . L. 7-7.5 

 mm. ; w. 7.4-8.4 mm. 9 . L. 8.5-9 nnn. ; w\ 8.5-8.8 nnii. 



(June) Ont. and N. Y., westw. to Ind. and Mich., southw. to Tenn. Swampy and 

 boggy woodlands. 



L. {Lasiotndstix) tenuicornis O. S. 



1869. Limnophila tenuicornis Osten Sacken: Mon. Dipt. X. Amer., 

 4 : 208-209. 



Fig.— Alexander, Cfls. N. Y., 1, pi. 38, fig. 117 (wing); 1919. 



General coloration gray, the praescutal disk and scutal lobes more 

 infuscated, pruinose laterally; pleura pruinose. Antennae {$) elon- 

 gate, nearly one-half the entire body, the structure almost as in the last 

 species. Wings with cell Rz sessile to very short-petiolate. Abdo- 

 men relatively long, dark brown; hypopygium blackened. $. L. 

 7-7.5 mm. ; w. 7-7.5 mm. 9 . L. 8-9 m'm. ; w. 7.5-8.5 mm. 



(Late May-July) Ont., Que., Me., N. H., Vt., Mass., N. Y., southw. to Va. and S. C. 



Connecticut.— Norfolk, May 31, 1931, June 9, 1929, June 12, 1931 (C.P. A.): W. 

 Granby, June 8, 1929 (C.P. A.). 



Subgenus Dicranophragma Osten Sacken 



1859. Lhnnophila {Dieranopkragma) Osten Sacken; Proc. Acad. 

 Nat. Sci. Philadelphia, 1859 : 240. 



The subgenus Duranophragma is represented in our fauiui by two 

 common species. The center of distribution for the group lies in the 

 mountains of the Oriental Kegion. The adult flies may be swept from 

 rank herbage in swampy or boggy woods, wliere they rest with the 



