18 E ' Canadian Arctic Exyedition, 1913-18 
Genus Galerucella Crotch. 
Galerucella decora Say. 
Langton bay (Franklin bay), Northwest Territories, 1910-11, V. Stefansson 
and R. M. Anderson, collectors; Nos. 1700 to 1704 and 1698 to 1699. 
Genus Haltica Geoff. 
Haltica bimarginata Say. 
Langton bay, Northwest Territories, V. Stefansson and R. M. Anderson, 
collectors, 1910-11; No. 1631. 
Family DYTISCIDAE. 
By J. D. Sherman, Jr. 
Genus Hydroporus Clairv. 
Hydroporus humeralis Aube. 
Teller, Alaska, August, 1913, two specimens; Konganevik, Camden bay, 
Alaska, June, 1914, three specimens; Demarcation point, Alaska, May, 1914, 
j&ve specimens; Bernard harbour. Northwest Territories, June, July, six speci- 
mens. All collected by F. Johansen. A common, variable. Pacific coast species. 
Hydroporus tartaricus Lee. 
Collinson point, Alaska, September, 1913, seven specimens; Demarcation 
point, Alaska, May, 1914, five specimens; Bernard harbour, Northwest Terri- 
tories, May to August, five specimens; all collected by F. Johansen. 
Hydroporus sp. (Perhaps tristis Payk.) 
Bernard harbour. Northwest Territories, May, July, F. Johansen; two 
specimens. 
Genus Coelambus Thom. 
Coelambus unguicularis Cr. 
Bernard harbour. Northwest Territories, June, F. Johansen, collector; four 
specimens. 
Genus Ilybius Er. 
Ilybius angustior Gyll. 
Teller, Alaska, August 1913, F. Johansen, collector; two specimens. Ex- 
tremely common in Labrador. 
