74 INSECUTOR INSCITI^ MENSTRUUS 



adult is larger, with more white scales on the legs, and some- 

 what more hairy body. 



Aedes nearcticus Dyar. 



A'edes nearcticus Dyar, Rep. Can. Arc. Exp., iii, Pt. C, 32. 1919. 

 Aedes (Ochlerotatus) parvulns Edwards, Bull. Ent. Res., xii, 314, 

 1921. 



The male hypopygium is not heavily chitinized, the aedoeagus 

 inconspicuous ; the apical lobe is larger ; the claspette-filament 

 has a broader membranous expansion, roundedly angled in the 

 middle. The basal lobe is as in alpinus, without or more 

 rarely with a marginal spine. The larva has the anal segment 

 with dorsal plate, the air-tube with evenly spaced teeth. The 

 adult is smaller, with less white scales on the legs, and some- 

 what less hairy body. 



My Greenland material consists entirely of alpinus; but both 

 species occurred together in the collections from the Canadian 

 Northwest Territories and arctic Alaska. 



The species of the subgenus F inlay a are rather numerous in 

 Edwards's list on account of the extent given to his faunal 

 region. The species A. gcniculatus Oliv. represents our A. 

 triseriatus Say, and like it, breeds in tree-holes. 



The subgenera Ecculex Felt and Aedes Meig. contam the 

 species vexans Meig. and cinereiis Meig., already known to be 

 common to Europe and America. 



The subgenus Stegomyia contains four species, all of oriental 

 origin. One, A. aegypfi Linn., occurs with us, but by way of 

 tropical importation only. 



Genus Culex Linnaeus 

 Edwards places my subgenus Neoculex as synonymous with 

 Culex proper, stating that intermediate forms occur. Three 

 species are made common to Europe and America, two by com- 

 merce as already well known, the third by way of the holarctic 

 fauna. Edwards calls this species apicalis Adams, but I refer 

 to my previous discussion of testaceus van der Wulp (Ins. Ins. 

 Mens., vii, 36, 1919). I am since informed that the male type 

 has lost the abdomen. It therefore becomes indefinite and I 



