^vy.son.anf„,^//^^ 



Insecutor Inscitiac Mens 



Vol. VIII JULY-SEPTEMBER, 1920 Nos. 7-9 



THE CLASSIFICATION OF AMERICAN AEDES 



(Diptera, Culicidce) 

 By HARRISON G. DYAR 



Recently (Ins. Ins. Mens., vi, 75, 1918), I gave a table of 

 American Aedes, dividing the genus into groups on the char- 

 acters of the male hypopygium. These groups may properly be 

 called subgenera, and with recent changes in nomenclature, 

 stand as follows : 



1. Claspette developed, with filamentous seta and columnar base 2 



Claspette rudimentary, a short seta from a conical base, 



H owardina Theobald 



Claspette absent 3 



3. Side-piece with apical and basal lobes, 



Heteronycha Lynch Arribalzaga 

 Side-piece with basal lobe, no apical one, 



Tacniorhynchus Lynch Arribalzaga 

 Side-piece without lobes Finlaya Theobald 



3. A hairy or spinose lobe at base of side-piece 4 



Without this structure ; basal membrane expanded or modified, 



Stegomyia Theobald 



4. Lobe at base of side-piece complex ; clasper modified, furcate 



and with a basal branch Acdes Meigen 



This lobe simple ; clasper without basal branch, though some- 

 times modified at apex Ecculex Felt 



The subgenus Heteronycha (for the use of the name see 

 Ins. Ins. Mens., vii, 88, 1919) may be considered to include 

 groups iv and v of my former paper, as I think canadensis, 

 the only species in Group V, should not properly be separated 

 as a subgenus. So taken, the subgenus may be divided into 

 groups, still using the characters of the male hypopygium. 



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