42 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. G9 



Type loGaUtxj.—K(i(\. Hill, Moiiltonbure:h, N. H. Type in U. S. 



National Museum, Cat. No. 15409, U.S.N.M. 

 Distrihution. — Maryland: Plummers Island, Ma}^ 9, 1914 (R. C. 

 Shannon) ; June 8, 1914 (Schwarzancl Shannon). 

 New Hampshire: Red Hill, August 5, 1902 (H. (1. 



Dyar). White jNIountains (H. K. Morrison). 

 New York: Plattsburo-, August 18, 1904 (H. G. 



Dyar). 

 Virginia: Skyland. July 19, 1912 (H. G. Dyar). 

 Dead Run, May 28, 1915 (R. C. Shannon).' 



SIMULIUM ARCTICUIVI JVIalloch 



Simulium arciicuiu Malloch, U. S. Dtpt. Art., Bur. Eut.. Tech. Ser. No. 



26, 1917, p. 37. 

 Simulium huntcri Malloch (iiart), U. S. Dt'pt. Agr.. Bur. Ent., Ttcli. Ser. 



No. 26, 1914, 1). 59. 

 Simnlium simile Malloch, Canad. Arctic Exp.. 1913-1918, vol. 3, 1919. 



p. 42c. 

 Simulium .simile Camekois, Dom. Canada, Dept. Agr., Bull. No. 5, ii. ser. 



1922. 



A species of variable size with pale pilosity, two large pale polli- 

 liosc spots connected with a median one on anterior mesonotum; 

 shining frons; yellowish coxae; bicolored legs with a very distinct 

 patch of silvery pollen on fore tibia. Hypopygium as in venuHtiun, 

 but anal lobe broadly rounded below and bluntly pointed, finely 

 pilose; chitinized in spots; arms of genital rod with a very large 

 truncate tooth centrally. (Figs. 80 and 81.) 



Male hypopygium as in venustum but head of adminiculum more 

 coarsely spinose, teeth of adminiculum arms feAV, long, and widely 

 spaced, only in the angles; lateral plates large, fimbriate. (Figs. 

 109 and 110.) ' 



An abundant species in the Northwest. Cameron has I'ecentU 

 reported it (as simile) as a severe pest to cattle in the Saskatchewan 

 region and gives an extended account of its morphology and biology 

 with figures. It is also an exceedingly annojdng species to man. 

 Two hundred and forty specimens. 



Type localities. — Of arcticuni, Kaslo, British Columbia. Type in 

 U. S. National Museum, Cat. No. 15410. 

 U.S.N.M. 

 Of simile., Arctic Sound, C^anada. Type in the 

 Canadian National Collection. 

 Distribution. — Alaska : Camp ?>2T, Alaska Eng. Com. July 12, 

 1921 (J. M. Aldrich). Healy, July 7, 1921 ("j. m! 

 Aldrich). 

 Alberta: Banff, July 13. 1918 (H. G. Dyar). 



