CATALOGUE OF INSECTS. 



635 



Family BIBIONIM3. 



Loose-jointed, ungainly flies of 

 moderate size, with long, stout legs, 

 body often clothed with long hair, 

 antenme 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 ridiculously 

 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 larvse 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. 



BIBIO Geoff. 



Fig. 296. — Bibio albipennis : a, male; c, iti head; b, 



female ; d, her head ; all enlarged. Other 



references to structural details. 



B. albipennis Say. Westville, V, 19, 



Clementon, V, 30 (Jn), Caldwell (Cr), Newark (Sm). 



B. pallipes Say. Riverton, V, 1, Jamesburg, VII, 4. 



B. femorata Wied. Riverton, V, 1 (Jn), Newark, V (Sm), Caldwell (Cr). 



B. xanthopus Wied. Caldwell (Cr), Riverton, IV, 30. 



B. longipes Loew. Palisades (Love). 



DILOPHUS Meig. 



D. breviceps Loew. Clementon, V, 9, VI, 16, Westville, V, 19. 



D. dimidiatus Loew. Anglesea, V, 28 (W), V, 30 (Sm), Avalon, VI, 



PLECIA Wied. 

 P. heteroptera Say. Jamesburg (Sm), Caldwell (Cr). 



SCATOPSE Geoffroy. 



S. notata Linn. Clementon, V, 9. 



S. pygmaea Loew. Riverton, VII, 31, IX, 9. 



S. atrata Say. Riverton, IV, 23. 



