THE INSECTS OF NEW JERSEY. 763 



P. subvirescens Loew. Riverton VI, VII (Jn) ; Delair VIII, 14 (Dke). 



P. nigripes Loew. Newark IX (Wdt) ; Clementon X, 4 (Hk) ; Buena Vista 



VI, 10 (Jn). 



P. nitidiventris Loew. Trenton V, 20 (Hk); Riverton IX, 14 (Jn). 



P. subopacus Loew. Newark VII (Wdt); Riverton VI, 1, VII, 19 (Jn), 

 Clementon V, 30 (Hk). 



P. pallipes Johns. Trenton VIII, 21 (Hk) ; Wildwood VIII, 27. 



P. fuscus Loew. Trenton VII, 7, Wenonah VI, 23 (Hk). 



P. cingulata Loew. Forest Hill (Wdt). 



P. houghi Kertez. Trenton V, 24 (Hk) ; Brown's Mills, V, 13. 



Family SYRPHID^E. 



These are "flower-flies." usually brightly colored and banded with yel- 

 low on a black, bronze or blue ground. They have very short, aristate 

 or stylate three-jointed feelers, barrel-shaped bodies, and somwhat flat- 

 tened abdomen, varying from slender to broadly oval. Sometimes they 

 are almost bare and resemble wasps in appearance and habits; at others 

 they are hairy and resemble bees, even in the droning or buzzing noise 

 that they make. The mouth parts are formed for scraping and lapping 

 only, and they feed upon honey or pollen. 



In larval habits they vary greatly. Some are predatory and feed upon 

 plant lice; these are usually wrinkled, pointed anteriorly, and live among 

 their prey upon leaves of plants. Others feed in 

 plant tissue, being more or less maggot or grub- 

 like; and yet others are scavengers, the larvae 

 feeding in the foulest excrementitious matter; 

 these are usually furnished with a long breathing F - 3 _ A ra t-tailed" 

 tube from the anal end, and are known as rat- larva. 



tailed larvae. Some few species seem to feed 



upon pollen, and at least one form occurs between the leaf and stalk 

 of corn, feeding upon the juices. Yet on the whole the species are 

 beneficial. 



MICRODON Meig. 



M. globosus Fab. Riverton IX, 14, Westville VII, 2, IX, 10, Anglesea IX, 

 4 (Jn) ; Pemberton VII, 8 (Hk) ; DaCosta VII, 1-16 (Dke) ; Cape May 



VII, 31 (Vk). 



M. megaiogaster Snow. Clementon V, 30 (Jn) ; Wenonah VI, 23 (Hk). 



M. tristis Loew. Ft. Lee (Osburn) ; Dover VI, 17, Newark VI, 14, Clem- 

 enton V, 9 (Jn); Brown's Mills VI, 22 (Dke). 



M. aurifex Wied. Forked River Mts. VII, 9 (Fenninger). 

 M. rufipes Macq. Lakehurst VII, 7. 



MIXOGASTER Macq. 

 M. breviventris Kahl. Lucaston VIII, 27, IX, 14 (Dke). 



