30 PBOCEEDINGS OF THE NATIONAL MUSEUM vol. GO 



MissouKi: Kansas City, April 8, 1899 (C. F. 

 Adams). 



Montana: Bozeinan, August 7, 1914 ( — ■ -). 



Nevada: Reno, October 8, 1915 (H. G. Dyar). 

 Neav York: Niagara Falls, November. 1896 



( )• 



North Dakota: Minot, July 15, 1921 (H. G. 



Dyar). 

 Oregon: Crater Lake, July 28, 1920 (H. G. Dyar). 

 South Carolina : Spartanburg, June 6-August 14, 



1912 (Jennings and King). Greenville. May 15, 



1912 (Jennings and King). 

 South Dakota: Brookings (J. M. Aldrich). 

 Texas: Sabinal, March 22, 1911 (F. C. Pratt). 

 Washington : Ritzville, July 31, Se])tember 9, 1920 



(R. C. Shannon). Oroville. Julv 21. 1920 (H. G. 



Dyar). 

 Wyoming: ]Mammoth Hot Springs, July 13, 1922 



(H. G. Dyar). 

 Yukon Territory : White Horse, June 29-July 28, 



1919 (H. G. Dvar). Selkirk. June 13. 'l919 



(H. G. Dyar). 



SIMULIUM DECORUM WaJkei 



Sliiuiliitm decoriun Waxkek, Cnt. Brit. Mu.s. Dipt., vol. I, p. 112, 1S4S. 

 Simulium venustoides Hart, 27tli Rept. State Ent. 111., 1912. p. 42. 

 SimuUum piscicidium Malloch (not Riley), U. S. Dept. Agr., Bur. Ent., 

 Tech. Ser. No. 26, 1914, p. 4(5. 



A rather large bluish-gray species with legs largely brownish 

 yellow; fifth to ninth tergites of full width, subshining. bluish 

 gray; bases of wings brownish yellow; stem vein white pilose. 



Female h^-popygium: Much as in vlttatum. Anal lobe rouud- 

 edly full below, chitinized and with small setae. Ovipositor flaps 

 approximate at tip and fimbriate, rather short. Arms of genital rod 

 widely divaricate, simple to half way; a chitinized rod and short 

 tooth at apex with chitinization beyond joining the surface mem- 

 brane (figs. 69 and 70) . 



Male hypop3^gium as in mtfatum, rather darker, the claspers with 

 four teeth. (Figs. 133 and 134.) 



Apparently a rather rare species of wide distribution. Thiee 

 specimens bear the label " biting.*' According to the dates it appears 

 to be a two-brood species. Twenty-one specimens. 



