CATALOGUE OF INSECTS. 579 



BCETHUS Forst. 

 B. schizoceri How. Parasite on sweet potato saw-fly (Ashtn). 



MESOLEIUS Holm. 



M. submarginatus Cress. New York (Davis). 

 M. mellipes Prov. New York (Davis). 



Tribe V Bassini. 



BASSUS G-rav. 



B. lsetatorius Fabr. " New Jersey," common (Ashm), Riverton, V, 7 (Jn). 

 B. orbitalis Cress. New York (Davis). 



PROMETHUS Forst. 

 P. costalis Prov. New York (Ashm). 



SYRPHOCTONUS Forst. 



B. agilis Cress. " New Jersey " (Davis). 



Tribe VI Exochini. 



ALCOCERAS Forst. 

 A. trifasciatus Cress. " United States " (Cress). 



CHORIN^US Holm. 



C. carinatus Cress. New Jersey, probably. 



TRICHISTUS Forst. 

 T. curvator Fabr. New Brunswick (Sm). 



METACCELUS Forst. 

 M. lsevis Cress. New Brunswick, VIII, 17 (Sm). 



EXOCHUS Grav. 

 E. dorsalis Cress. " New Jersey " (Cress). 



Tribe X Metopiini. 



METOPIUS Grav. 

 M. pollinctorius Say. " United States " (Cress). 



