I 



#ccas!ional ^aper£f 



OF THE 



pos^ton ^ocietp of i^atural Higtorp. 



VII. 



ERNEST PAUL DU BOiS 



FAUNA OF NEW ENGLAND. 



15. 



LIST OF THE DIPTERA OR TWO-WINGED FLIES. 



By Charles w. johnson. 



BOSTON: 



PRINTED FOR THE SOCIETY FROM THE 



GURDON SALTONSTALL FUND, 



FEBRUARY, 1925 



