400 GEOLOGICAL SURVEY OF NEW JERSEY. 



Family HETZRONEURID^. 



HETBRONBURA, Fallen. 

 H. albimana, Meigen. 



Also common to Europe and North America. 



Family OPOMYZID^. 



OPOMYZA, Fallen. 

 O. signicosta, Walk. 



SOYPHBLLA, R. Desv. 

 S. flava, Linn. 



S. similis, Macq. 



N. cylindrica, Fabr. 

 N. minuta, Wied. 



Family SFPSID^. 



SEPSIS, Fallen. 



NBMOPODA, R. Desv. 



Family PIOPHILDiE. 



PIOPHILA, Fallen. 



P. casei, Linn. 



The common " Cheese Mite.' 

 P. nigriceps, Meigen. 

 P. petasionis, L. Duf. 



Family DIOPSIDiE. 



SPHYRACEPHALA, Say. 



S. brevicornis, Say. 



