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



General coloration gray; praesciitum with a broad median and 

 narrow lateral blackish stripes. Head gray; posterior vertex with a 

 blackish area on either side; rostrum black. Knobs of halteres dark- 

 ened. Legs brownish yellow; tarsi darker. Male hypopygium (Fig. 

 37, H). $. L.. exclud. rostrum. 5-6.5 mm.; w. 5-6.5 mm.; rostrum 

 2.2-2.7 mm. 9. L., exclud. rostrum. 6-7.5 mm.: w. 6.5-7 mm.; ros- 

 trum 2.5-2.8 mm. 



(May-Oct.) Me.. Mass., N. Y., westw. to Ind., Mich., Wise, and AIo., soutliw. to 

 N. C, S. C. and Tenn. 



Connecticut.— Kent Falls. Tune 12-13. 1931. July 23-24, 1931, Aug. 19, 1931 (C. P. 

 A.) ; Middletown, May 30, 1929 (R. C. N.). 



L. {Geranomyia) rostrata (Say). (Fig. 37. 1). 



1823. Limnohia rostrata 8av: Journ. Acad. Nat. Sci. Philadelphia, 



3:22. 

 1869. Geranomyia rostrata Osten Sacken; Mon. Dipt. N. Amer., 



4:79-80. 



Figs. — Alexander, Proc. Acad. Nat. Sci. Philadelphia. 1916, pi. 25, fig. 7 (wing) ; 

 1916. Alexander, Cfls. N. Y., 1, pi. 31, fig. 10 (wing) ; 1919. 



Mesonotum obscure yellow, the i)raescutum with three confluent 

 brownish gray stripes; .scutal lobes darkened. Knobs of halteres dark 

 brown. Male hypopygium (Fig. 37,1). $. L., exclud, rostrum, 

 5-6.5 mm.; w. 5.5-8 mm.; rostrum, 2.5-3 mm. 9 . L., exclud. rostrum, 

 5.5-7.5 mm.; w. 5.5-7 mm.; rostrum, 2.6-3.1 mm. 



(May-Seot.) Que., Me., N. H., Vt., Mass., N. Y., Pa., westw. to Mich., 111. and 

 Mo., southw. to Fla.. Ala. and La. 



Connecticut.— Hamden, July 11, 1932 (N. T.); Manitic Lake. June 8-9, 1929 (C. P. 

 A.); Rowayton, June 16, 1909 (C. W. J.). 



Doubtful species : 



L. {Geranomyia) costomaculata (Dtz.) (Trans. Amer. Ent. Soc, ^7:Zi7-22>%; 

 1921, as Geranomyia). 



Close to diversa. Thorax dark brown, pruinose ; praescutal stripes obsolete. 

 Wing-spotSi as in diversa but larger and more conspicuous, the first area at super- 

 numerary crossvein in cell Sc, the second including both origin of Rs and fork of 

 Sc ; the third, large and rhomboidal in outline, at stigma. 



Hazleton, Pa. ; May 27, a single $ . 



This fly may represent a valid species by the obsolete praescutal stripes, which 

 are clearly defined in all specimens of diversa that I have seen. 



2. Subtribe Heliaria 



Helius St. Fargeau 



1825. Helius St. Fargeau; Encycl. Method., Index, p. 831. 

 1830. Rhamphidia Meigen; Syst. Beschr. Zweifl. Ins., 6: 281. 



An extensive genus, with representatives in all major regions of 

 the World, including New Zealand. The local species are eminently 

 characteristic of open marshy areas where the adults may be swept 

 from reeds and sedges, while the immature stages live in the black 

 organic soil of the habitat. 



