734 REPORT OF NEW JERSEY STATE MUSEUM. 



C. viticola O. S. Ft. Lee district; galls on leaves of wild grape (Bt) ; 

 Staten Island (Ds) ; Vincentown (U S Ag). 



Family BIBIONID^E. 



Loose-jointed, ungainly flies of moderate size, with long, stout legs, 

 l>ody often clothed with long hair, antennae many jointed but short and 

 stout, mouth parts a little produced. There is often considerable differ- 

 ence between the sexes, and in some cases the females have a ridicu- 

 lously small head. From the very early appearance of some species 

 they are called "March flies," and sometimes they occur in orchards in 

 numbers so great as to attract attention. 



The larvae are cylindrical, footless grubs, and "feed on excremental or 

 vegetable substances, especially on the roots of grass." They have not 

 been, thus far, injurious in New Jersey. 



PLECIA Wied. 



P. heteroptera Say.' Caldwell (Cr) ; Jamesburg (Sm); Lucaston IX, 4, 

 Manumuskin X, 21 (Dke). 



BIBIO Geoff. 



B. albipennis Say. Caldwell (Cr) ; 



Newark (Sm) ; Westville V, 19, 



Clementon V, 30 (Jn) ; Manu- 

 muskin V, 21 (Dke). 

 B. pallipes Say. Husted V, 21 



(Coll) ; Jamesburg VII, 4, Riv- 



erton V, 1. 

 B. femorata Wied. Caldwell (Cr) ; 



Newark V (Sm); Riverton V, 



1 (Jn); National Park V, 6 



(Dke). 

 B. xanthopus Wied. Caldwell (Cr), 



Riverton IV, 30. 

 B. longipes Loew. Palisades (Lv) ; 



Delair, Riverton, Wenonah, Lu- 

 caston, common X, XI (Dke). 

 B. slossonae Ckll. (gracilis Walk. 



not Unger.) Clementon X, 11 



(Hk). 



DILOPHUS Meig. Fig. 3 oi.Bibio albipennis: a, male; c, its 



head; b, female; d, her head; all en- 



D. brev.ceps Loew. Toms River V, larged Qther references to 



30 (Dke); Westville V, 19, structural details. 



Clementon V, 9, VI, 16. 



