258 



NORTH AMERICAN DIPTERA 



111 



114 



Syrphidje V. — 91, Cartosyrphus ; 92, Chrysogaster nigrovittata; 93, Neoascia globosa ; 

 94, Sphegina infuscata ; 95, Khingia nasica ; 96, Hammerschmidtia ferruginea ; 97, Brachyopa 

 notata; 9S, Merapioidus villosus ; 99, Ferdinandea croesus; 100, Platycheirus quadratus; 101, 

 Platycheiius peltatus, front tibia and tarsus: 102, Chrysogaster; 103, Pelecocera pergandci; 104, 

 Cartosyrphus; 105, Sphegina infuscata; 106, Neoascia globosa ; 107, Myiolepta nigra; 108, 109, 

 Chalcomyia serea, ? c : HO, Merapioidus villosus; 111, Brachyopa notata; 112, Rhingia nasica; 

 113, Hammerschmidtia; 114, Criorrhina. 



