Fig. io. — Labial plates (greatly enlarged) : /, Aides fuscus; 2, 

 OcJiterotatus bimaculatus; 3, Culex pipiens; 4, Melanoconion atratus ; j - , 

 0. sollicitans ; 6, Uranotcenia lowii; 7, 0. sylveslrisj 8, Grabhamia 

 jamaicensis ; g, 0. triscriatus; 10, C. restuans; 11, Psorophora howardii; 

 12, G. discolor. 



59 



