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Jomb scales with lateral spinules as long as the apical one. An early spring 
SPECIES meee ts SS hie! sts ek eee Aédes grossbeckt Dyar and Knab.! 
Comb scales with the lateral spinules very short. An early spring species. 
Ochlerotatus pretans Grossbeck. 
Apical spinule of the comb scale sharp and distinct An early species in the 
Northwest's. 5302 = s S82 ae eee Ochlerotatus astivalis Dyar. 
Apical spinule of comb scale not sharply distinct. An early spring species 
imyphesNonrtheast.].2 == ase. ==. eee See eee Ochlerotatus subcantans Felt. 
Anal gills moderately long. An early spring species in the Northeast. 
Ochlerotatus lazarensis Felt. 
Anal gills very short, bud-shaped. The Pacific coast salt-marsh mosquito. 
Aédes quaylei Dyar and Knab.* 
1 Lepidoplatys squamiger (in part). 
2 Ochlerotatus lativittatus. 
Approved : 
JAMES WILSON, 
Secretary of Agriculture. 
WASHINGTON, D. C., April 27, 1906. 
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