178 THE CANADIAN ENTOMOLOGIST. 



Mandibles 3-denlate, the two inner (mesal) teeth, however, shallow, 

 equal, and taken together like a single broad tooth notched at the centre 

 of its apical margin ; the outer (lateral) tooth acute, but very slightly 

 longer. 



(From eight specimens, two-thirds-incli objector, two-inch optic. 

 Bausch and Lomb.) 



Male, — Unknown. 



This beautiful species was described from eight females reared June 

 23 (seven $ s) and July 7th, 1908 (one ? ) from the same lot of Kermes 

 pubescens Bogue. 



Types : Accession Nos. 37,561 (five $ s, tag-mounted) and 37,S93 

 ( 9 head and antenna, one slide, xylol-balsam), Illinois State Laboratory 

 of Natural History, Urbana, Illinois. Co-type : No. 12,166, United States 

 National Museum, Washington, D. C., two $ s, tag-mounted. 



A NEW ALASKAN MOSQUITO. 



BY C. S. LUDLOW, 

 Army Medical Museum, Washing^ton, D. C. 



For several years there appeared in the collections of mosquitoes from 

 Alaska what were evidently two distinct species, but in such bad condition 

 that it was impossible to be sure just what the differences were. Now, 

 after some four years of indicision, specimens have been received that 

 allow of differentiation and description, and I give below the description 

 of what seems to be a new species: 



C?^/ex borealis, n. sp. 



Female. — Head very dark brown, covered with broad, curved ochra- 

 ceous scales in a comparatively narrow median space from vertex to occiput, 

 broad, flat ochraceous scales laterad and extending as lateral scales, a few 

 fork scales, light and dark, at the nape ; brown bristles projecting forward 

 over and between the eyes ; antennae brown, verticels brown, pubescence 

 light, basal joint testaceous, with flat pale ochraceous scales on the median 

 aspect ; palpi dark brown, with a very few light scales, mostly on the 

 ventral side ; proboscis very long (about seven times longer than the 

 palpi), almost black ; eyes reddish-brown ; clypeus dark, and in some 

 specimens the contiguous mouth-parts much distended, rather pouch-like 



on the ventral side. 



Thorax : Prothoracic lobes dark, with pale ochraceous flat scales ; 

 mesothorax very dark, covered with large curved scales, a narrow median 



May, 1911 



