ART. 10 THE FAMILY SIMUIJIDAK DYAR AND SHANlSTOISr 43 



British Columbia : Kaslo, July 4, 1903 (K. P. Cur- 

 rie). Lake Atlin, July 27, 1919 (H. G. Dyar). 

 Kokanee Mountain, August 10, 190o (H. G. 

 Dyar). London Hill Mine, July 21, 1903 (R. P. 

 Currie). Lilloet (vi3()2). Hazelton, September 

 5, 1919 (H. G. Dyar). 



California: Clio, July 9, 191G (H. G. Dyar). 

 Fallen Leaf, June 4, 1916 (H. G. Dyar). Gold 

 Lake, July 19, 191G (H. G. Dyar). ' 



Colorado: Virginia Dale, September 31,1912 (F. C. 

 Bishopp). Fraser River, June 26, 1923 (H. G. 

 Dyar). Peetz, July 13, 1921 (G. A. Sandhoiise). 



Idaho: Moscow, April 8, 1913 (J. M. Aldrich). 

 Marsh (J. M. Aldrich) . Albion (J. M. Aldrich) . 

 Lahwai, March 27, 1909 (J. M. Aldrich). Gos- 

 pel Mountain, July 12, 1907 (J. M. Aldrich). 



Montana: Great Falls, July 7, 1921 (H. G. Dyar). 

 Rainbow Falls, July 9, 1921 (H. G. Dyar). Bel- 

 ton, June 19, 1921 (H. G. Dyar). Cut Bank, 

 July 5, 1921 (H. G. Dyar). 



Nevada: Reno, October 8, 1915 (W. R. Munroe). 



Oregon: Detroit, May 20, 1924 (H. G. Dyar). 



Saskatchewan: Rothern, June 1, 1915, (W. R. 

 Munroe). 



Washington: Glacier, June 4, 1917 (H. G. Dyar), 

 Longmire Springs, August 2, 1905 (J. M. Aid- 

 rich). Ritzville, July, 1920 (R. C. Shannon). 

 Yakima, December, 1919, larvae and pupae (J. M. 

 Aldrich). 



Wyoming: Old Faithful, June 29, 1922 (H. G. 

 Dyar). 



Yukon TERRrroRv: Selkirk, June 13, 1919 (H. G. 

 Dyar). Dawson, September 8, 1912 (J. M. 

 Jessup). 



SIMULIUM PERISSUM, new species 



8i)»ulii(ni j('>iiii)if/t<i, Malloch (pavt), U. S. Dept. Agr.. Bur. Ent., Tecli. 

 Scr. N(.. 26. 1914, p. 42. 



A medium sized species, very clo.se to revustu)ii and very difficult 

 to sejiarate from the typical form. It is somewhat darker, with evi- 

 dence of three mesonotal vittae; the stem vein is black pilose. Cerci 

 rounded quadrate, infuscated, .setose, anal lobe unmodified, setose, 

 with rather broad median chitinized area. Ovipositor flaps weak, 

 remote at tips, slightly embrowned in inner margins. Forks of 



