No. C4J DIPTEHA OF COX X K(TI ( I T : lAXOXOMY 471 



IN. i., 1, pi. 34, fig-. 64 (wing) ; 1919. 



General coloration dark brown, praescutum witli tliicc ^till .laikcr 

 brown strii)es. Antennae dark brown, appio.ximatelv as lon.^ a< l.c.lv 

 {$). Halteres dark brown, paler basally. Wiiijrs witli a faint «rniv 

 tin«ie; stit^ma rll-defined. Male liyi)()|)y<riiiiii (Fi<r. .-,4. A), i^ l". 

 '5-4.5 inni.; w\ 4.5-r).r) mm. 



(June: Sept.) Que., N. B., Me., N. H., Vt., N. Y., Pa. 



O. meigenii ((). S.) (Fig. 54, B). 



i^i:)d. Enoptera meigenii Osten Sackeii : Pi()( 



adelphia, 1859 : 22(). 

 1869. Rhi/pholophm meiqenii Osten Sackei 



4:144-145. 



Fig.— Alexander, Cfls. N. Y., 1, pi. 34, fig. 61 (\vi 



Oeneral coloration gray. Halteres light yellow. Wings with a 

 gray tinge, the stigma brown, well-marked, preceded and followed liy 

 somewhat more whitish areas; cell Jnd Mj nearly truncate at base. 

 .Male hypopygiuni (Fig. 54, B). $. L. 3.6-4.5 mm.: w. 4.5-5.S mm. 

 ? . L. 4.5-5 nan. ; w. 5-5.5 mm. 



(May, early June) Ont., Que., N. B., Me., X. H.. \'t., Mass.. X. \'.. X. J.. Pa., 

 westw. to Ohio and 111., southw. to V^a. and S. C. 



Connecticut.— Kent Falls, May 17, 30, 31, 1931 (C. P. A.); Xurtolk, Mav Id, 1931 

 (C. P. A.): Riverton, May 16, 30, 1931 (C. P. A.); Tyler Lake, June 13. 1931 

 (C. P. A.) ; W. Granby, June 8, 1929 (C. P. A.) ; Winsted. May 16. 1931 (C. P- A.). 



O. mesocera Alex. (Fig. 54, C). 



1917. (Jvniosia mesocera Alexander: Can. Kiit.. 4i»:L;5. 



Fig.— Alexander, Cfls. N. Y., 1, pi. 34, fig. 63 (wing) ; 1919. 



(leneral coloration light to dark brown, heavily gray piuinose; 

 anterior lateral pretergites yellow. Antennae ( 6 ) bhick "throughout, 

 if bent backward extending about to midlength of abdomen. Halteres 

 pale. Wings with a strong grayish tinge, the stigmal region slightly 

 darker. Male hypopygiuni (P'ig. 54, C). i. L. :5. 7-4.5 mm.: w. ;}.s- 

 5.5 mm. $. L. about 4-4.:2 mm.: w. 4.5-5 mm. 



(June, July) Ont., Que., N. B., Me.. X. H., \'t., X. Y. 



O. monticola (O. S.) ( Figs. 23. E : 54, D) . 



1869. Rh^iyholophus monticola Osten Sacken : Mon. Dil't. N. Amer., 

 4:145-146. 



Figs.— Xeedham, 23rd Kept. N. Y. St. Hnt. for 1907, pi. 11. fig. 5 (vcn.) : 1908, 

 (vein 2nd A erroneous). Alexander, Cfls. X. Y., 1, pi. 34. fig. (>1 (wing): l^'l". 

 Crampton, Insec. Inscit. Menst., 13, pi. 2, fig. 7 (thorax) ; 1925. 



General coloration pale brown, the praescutum with a somewhat 

 darker median stripe and sometimes with a bluish gray |)ruiiiosity ; 

 pleura yellow. Knobs of halteres weakly darkened. Ix'gs i)ale brown, 

 the tarsi ])aling to light yellow or vellowish-white. Male hypopyguun 



