Insecutor Inscitiae Menstruus 



Vol. VII OCTOBER-DECEMBER, 1919 Nos. 10-12 



NEW SIBERIAN CULICID^ 



(Diptera) 



By C. S. LUDLOW ' 



Among the specimens of mosquitoes sent by the Surgeons of 

 the American Expeditionary Force in Siberia are some which, 

 though closely allied to forms found in Alaska and the north- 

 western United States, are apparently new, and are described 

 below. 



Culiseta siberiensis, new species. 



Female : Head dark brown with large greyish white curved 

 scales, a line of more slender ones around the eyes, brown 

 forked scales on the occiput, and a few brown, and more white 

 flat scales on the sides, brown bristles ; antennae dark brown, 

 pubescence white, verticels dark brown, basal joint brown with 

 a well formed crown of brown and dirty white rather slender 

 flat scales, second and third joints with a few of the whitish 

 scales ; proboscis dark, covered with dark brown scales with 

 a few whitish ones intermixed, especially on the more proximal 

 portion, the apical third dark, labellas dark ; palpi dark covered 

 with dark brown scales and some admixture of the whitish 

 scales, especially at joints; clypeus dark brown, pruinose ; eyes 

 reddish brown. 



Thorax : prothoracic lobes widely separated, dark, thickly 

 covered with large greyish white curved scales and brown 

 bristles ; mesonotum very dark brown heavily covered with 

 almost black and some yellowish and greyish white large 

 curved scales, the latter tending to form a vague pattern, a 



' Contribution from the Army Medical Museum, Washington, D. C. 



151 



