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 BIBIONIDiE. 



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

 body 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 oi 

 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, 

 Mamimuskin 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. pal li pes 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. slossonas Ckll. (gracilis Walk, 

 not Unger.) Clementon X, 11 

 (Hk). 



DILOPHUS IVIeig. 

 D. breviceps Loew. Toms River V, 



30 (Dke); Westville V, 

 Clementon V, 9, VI, 16. 



Fig. 301. — Bibio albipennis : a, male; c, its 

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

 larged. Other references to 

 19. structural details. 



