364 



tion as in Figures 2, 5, 8, 11, Plate XXVII, the medio-cubital cross- 

 vein present ; surface hairs present on wings in some genera. 



Key to Genera* (Imagines) 



1. AVings with distinct surface hairs 2 



— Wings bare 4 



2. Cubitus forking slightly before the cross vein. . .T any pus (p. 366). 



— Cubitus forking distinctly beyond the cross vein. 3 



3. Anterior branch of radius (RJ forked at its apex 



Protentlies (p. 381). 



— Anterior branch of radius not forked Tridiotanypust 



4. Fork of cubitus petiolate 5 



— Cubitus forking proximad of the cross vein 6 



5. Anterior branch of radius (RJ forked at apex 



Procladius (p. 390) . 



— Anterior branch of radius unforked Psilofanypus (p. 395). 



6. Anterior branch of radius forked at apex. . .Ccclofanypus (p. 396). 



— Anterior branch of radius unforked AnatopyniaX. 



Key to Larv^ 



1. Labium with 4 teeth (PI. XXV, Fig. 1) . .Tanypus dyari (p. 379). 



— Labium with at least 5 teeth 2 



2. Outer labial tooth divided, making in all 7 teeth (PL XXV, Fig. 6) 



Procladius concinnus (p. 394) . 



— Outer labial tooth not divided, only 5 teeth present 3 



3. Anterior branch of radius (RJ forked at its apex 



Tanypus sp. A (p. 397). 



— All labial teeth rounded, or sharp at apices 4 



4. Labial plate very much elongated and narrow, the teeth long and 



finger-like (PI.' XXV, Fig. 5) Tayiypus sp. B (p. 398). 



— Labium not noticeably elongated, the teeth broad 5 



5. Middle tooth longest 6 



— Middle tooth not as long as outer tooth 7 



6. Teeth of labium forming a regularly rounded convex outline (PL 



XXV, Fig. 3) Tanypus carneus (p. 378). 



— Second tooth distinctly shorter than central tooth (PL XXV, 



Fig. 11) Tanypus pilosellusf (p. 373) . 



7. Lateral process of labium with its outer side fringed (PL XXV, 



Fig. 8) ProtenfJies culiciformis (p. 385). 



— Lateral process of labium bifid 8 



*My present material does not permit my giving generic keys for the larval or 

 pupal stages. 



tl have not seen this genus from Illinois. 



tThis genus has not been found in North America. 



