210 THOMAS SAY FOUNDATION 



Female. Seventh sternite produced into a broadly 

 rounded subgenital plate which covers at least half of the 

 following segment ; eighth sternite notched in middle, the 

 genital opening guarded by two rounded valves. 



Distribution. — Cotypes, No. 11361 9 and two 6 's, 

 Colden, N. Y., July 6, 1895 (Banks Collection Mus. Comp. 

 Zool., Cambridge, Mass.). 



The Banks Collection also contains the following: one 

 female, June 5, Chain Bridge, Va. ; one female, June 25, 

 Great Falls, Va. ; one female, Aug., Aurora, W. Va. 



We have specimens from the following localities : June 

 29, Ringwood, Tompkins Co., N. Y. ; May 21, Enfield Glen, 

 Tompkins Co., N. Y. ; June 2, 1923, McLean, Tompkins 

 Co., N. Y.; June 1, 1905, West Danby, N. Y. (A. D. Mac- 

 Gillivray) ; May 29, 1902, Newport, N. Y.; June 22, 1910, 

 Woolworth Lake, Fulton Co., N. Y. (C. P. Alexander) ; 

 July 1, 1923. Alcohol Brook, Adirondack Lodge, N. Y. (P. 

 W. Claassen) ; June 26, 1905, Old Forge, N. Y. (J. G. Need- 

 ham) ; June 26, 1920, Cranberry Lake, N. Y. (C. J. 

 Drake) ; May 21, 1911, Barton, Ga. (J. C. Bradley) ; May 

 18, 1911, Clayton, Ga. (J. C. Bradley) ; May 29-June 5, 

 Raleigh, N. C; June 28, 1903, Lake Forest, 111. (J. G. 

 Needham) ; June 18, 1888, Waltham, Mass. (S. Henshaw) ; 

 June 14, N. Adams, Mass. ; Sept. 8, 1889, Port Arthur, 

 Ont. ; Penn. 



Nemoura coloradensis Banks. 



(Plate 36, figs. 13-16.) 

 1897. Nemoura coloradensis Banks, Trans. Am. Ent. Soc, 24:2. 

 1907. Nemoura coloradensis Banks, Cat., p. 14. 



Length to tip of wings, male, 8.5-9.5 mm. ; female, 

 10-10.5 mm. Expanse, male, 14-15 mm.; female, 15-16 

 mm. 



General color blackish brown. 



Head not wider than prothorax ; hind ocelli closer to 

 eyes than to each other ; antennae blackish. 



Prothorax slightly wider than long, moderately rugose ; 

 angles narrowly rounded. Legs dark brown, the femora 

 darker toward the tip, but not banded. Wings lightly in- 

 fuscated and somewhat darker at the stigma; anal field 

 of hind wings narrow. Gills present. 



Male. Subanal lobes produced, upcurved and bluntly 

 pointed (side view) ; viewed from below the subanal lobes 

 are divided into two parts, the inner short truncate, the 

 outer longer, upcurved ; cerci large membranous ; above 

 base of cercus is a rounded, membranous, hairy knob ; 

 supra-anal process recurved, slender, finely spinulose 



