400 GEOLOGICAL SURVEY OF NEW JERSEY. 



Family HETERONEURIDiE. 



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. 



Family SEPSID^. 



SEPSIS, Fallen. 

 S. similis, Macq. 



NBMOPODA, R. Desv. 

 N. cylindrica, Fabr. 



N. minuta, Wied. 



Family PIOPHILDJE. 



PIOPHILA, Fallen. 



P. casei, Linn. 



The common " Cheese Mite." 

 P. nigriceps, Meigen. 

 P. petasionis, L. Duf. 



Family DIOPSIDiE. 



SPHYRA'CBPHALA, Say. 

 S. brevicornis, Say. 



