DipU ra 



The radial vein is setose. Costa extends almost to apex of upper fork lia. 



The posterior branch of media runs nearly straighl from fork to wine, margin. 



Length, 3 mm. 



Locality: Teller, Alaska, August 3, 1913 (F. Johansen . 



Sciara, sp. 2. 



Two females in poor condition. These differ from the preceding sp< 

 in having the first vein ending in costa slightly before furcation of media, the 

 latter originating midway from cross-vein to base of radius, and gradually diverg- 

 ing from anterior branch of cubitus, the cell between the anterior branch and 

 radius, and narrowed basally. 



Length, 2-75 mm. 



Locality: Bernard harbour, Dolphin and Union strait, Northwest Terri- 

 tories, August 22, 1915 (F. Johansen). 



Sciara, sp. 3. 



This species differ from the preceding one in having the first vein ending in 

 costa a little over midway from cross-vein to fork of media, the latter originating 

 one-third of the distance from cross-vein to base of winy and the third branch 

 of radius ending closer to apex of wing, nearly in vertical line with apex of in- 

 terior branch of cubitus. 



Length, 3 mm. 



Locality: Nome, Alaska, August 21, 1916 (F. Johansen). < »nr female. 



CHIRONOMID/E. 



There are a number of specimens, representing several species, in the collec- 

 tion, but their condition is very bad so that specific identification i- not possible 

 except in a few cases. A number of larvae and pupa- in alcohol lend themseh 

 more readily to description and to generic classification than do the imagim 

 but so little is known of the immature stages of the many species occurring in 

 the Arctic regions that it is impossible to give specific identifications for the 

 specimens in this collection. 



TANYPIN^. 



There are two species of this subfamily in the collection, neither of which is 

 in very good condition. They apparently represenl distind genera. 



Tanypus Meigen. 



There is one species of this genus in the collection, some specimens of which 

 are in sufncientlv good condition to assure their identification. 



The larvae of this genus are me1 with in both swiftly flowing streams an. I m 

 standing water, such as lakes and pookj or even in water-barrels or other tem- 

 porary receptacles. 



Tanypus alaskensis, n. sp. 



Male.— Black, subopaque. Legs fuscous. Wings slightly greyisl 

 vein infuscated, but not broadly so. Halteres brown. Plumes ol antenna 

 and hairs of body and le<:> fuscous. 



Palpi long, antepenultimate joinl distinctly longer than penultimate, 

 latter longer than ultimate. Dorsum of thorax with numerous long hairs ra the 



Vol. iii— 46963— 3i 



