198 I\Ir. F. W. Edwaiels on 



Sciara ? pi'cecoa^, Mg. 



Bear Island: Walrus Bay, S.E., 15. vi. 1921 ; c. 20 ft., 

 on bare rock ; 1 c? . 



Spitsbergen : Bruce City, head of Klaas Billeu Bay, 

 22. vii. 1921 ; 0-50 ft., on shingly raised beach M'ith Dry as ; 



1 (?,1 ?. 



The specimens agree with Winnertz's description of this 

 European species. 



Mycetophilidae. 



Exechia frigida (Bohera.) . 



Synonyms : Mycetophila frigida, Boheman, Holmgren ; Parexechia 



' concolor, Becher; ? Exechia casta, Johannsen. Probably also the 



species recorded by Lundbeck from Greenland as Exechia fungorum. 



Bear Island : AYalrus Bay, S.W., 22. vi. 1921 ; c. 20 ft., 

 under walrus-bones on moss; 5 (J, 1 ? . Walrus Bay, S.E., 

 22. vi. 1921; 20-50 ft., shaly slope, \ mile inland, under 

 stones ; 1 (?, 2 ? . 



Spitsbergen: Bruce City, head of Klaas Billen Bay; 

 0-50 ft., flying over shingle with tundra and ponds ', \ $ . 



The structure of the hypopygium agrees more closely with 

 that of E. casta, Joh., than with that of any European 

 species which has been figured, and the two are probably 

 specifically identical, though, according to Johanusen's de- 

 scription, the American form is brown and not black. 



CMronomidsB. 



The great majority of the specimens in the collection 

 belong to this family. All the species represented belong to 

 the sul)family Chironominse, in Avhich (following Thieue- 

 mann, Mallocli, and Goetghebuer) 1 would include Diamesa 

 and its allies. 



Chironomus ? riparius, Mg. 



Synonyms : C. riparius (Mg.), Goetgbebuer ; C. nigroviridis, iVtacquart, 

 of Verrall's collection ; (J. kochianus, Kieffer. 



Spitsbergen : Bruce City, head of Klaas Billen Bay, 

 22. vii.-14. viii. 1921 ; round huts, on window-pane, and on 

 shingle of raised beach ; 4 c?, 8 ? . 



The structure of the hypopygium agrees well with 

 Goetghebuer's and KieflFer's figures. The first segment of 

 the front tarsus of the male has a short and inconspicuous 

 beard, the longest hairs being about twice as long as the 



