No. 64] DiPTER A OF Connecticut: TAXONOMY 307 



L. {Lirnonia) simulans (AValk.) (Fig. 34, O). 

 1848. Lrmnohki sim.ulam Walker; List Dipt. Brit. Mus.. 1:45. 

 1859. L>'icrar>oviyia defuncta Osten Sackeri; Proc. Acad. Xat Sci 

 Philadelphia. 1859:213. 



Figs.— Osten Sacken. Mon. Dipt. N. Atner., 4, pi. 3. fig. 1 (hyp.) : 1869. 

 Needham, 23fd Rept. N. Y. St. Ent. for 1907, pi. 11, fig. 1 (wing)- 1908 Alexan- 

 der, Cfls. N. Y., 1, pi. 31, fig. 24 (wing) ; 1919. 



General coloration gray, the praescutiim with three blacki.^h 

 stripes, the median more or less divided by a pale line. Knobs of 

 halteres black. Femora dark brown, tips black, preceded by a con- 

 spicuous yellow ring. Wings with four major brown costal areas, in 

 addition to the abundant lesser dotting; Sc^ ending before midlength 

 Rs. Abdomen dark brown ; caudal margins of segments, especially of 

 sternites, paler. Male hypopygium (Fig. 34, O) : dorsal dististjde 

 present ; rostral spines two, pale. $ . L. 6.5-7 mm. ; w. 7.5-8 mm. 

 $ . L. 8 - 9 mm. ; w, 8-10 mm, 



(May-Oct.) Ont., Que.. N. B., Me., N. H., Vt., Mass., N. Y., w. to 111., Mich 

 and Wise, southw. to S. C. and Tenn. ; at margins of fast-flowing streams ; on 

 exposed rock surfaces near waterfalls. 



Connecticut.— Kent Falls, Sept. 11, 1929 (A.J.W.); May 30-31, June 12, 13, Julv 

 23-24, 1931 (C. P. A.); Middletown, June 17, 1909 (C. W.J.): Storrs, Mav 1929 

 (C.J. A.); Winsted, June 9, 1929 (C. P. A.). 



The identity of L. (Z.) pellucidlguttata (Dietz) (Trans. Amer. 

 Ent. Soc, 47:242; 1921) must remain in question and the species may 

 well prove to be distinct. As far as known to me the fly is still 

 represented only by the unique type taken near Hazleton, Pa., July 

 22, in a swampy area. 



L. {Liinonia) sociabilis (O. S.) 



1869. Limn oh la sociahilis Osten Sacken; Mon. Dipt. N. Amer., 

 4:95-96. 



Pronotum and mesonotal praescutum shiny ochre-yellow, with a 

 broad brown median stripe; lateral stripes smaller, more or less 

 coalescent with the median. Head with front and part of vertex 

 brown. Halteres brownish ochreous. Wings yellow, unmarked; /?2 

 beyond midlength of stigmal area. ? . L. about 9 mm. 



The possibility exists that this is an abnormal form of tristigma. 

 As far as known to me, only the unique type, a female, from Illinois, 

 has been discovered. 



L. {Limonia) solitaria (O. S.) 



1859. Limnobia solitcvna Osten Sacken ; Proc. Acad. Nat. Sci. Phila- 

 delphia, 1859 : 215. 



Figs. — Osten Sacken, Mon. Dipt. N. Amer., 4, pi. 3, fig. 6 (hyp.) ; 1869. 

 Alexander, Cfls. N. Y., 1, pi. 32, fig. 31 (wing) ; 1919. Dickinson, Cfls. Wise, p. 

 155, fig. Zl (claw); p. 153. fig. 34 (ant.); p. 152, fig. 30 (head); p. 186, fig. 60 

 (wing); p. 247, fig. 160 (hvp ) ; 1932. 



