00638nam a2200181Ia 4500001001000000003000500010008004100015010001100056040000900067082001900076100001900095245008100114260005400195300002700249440001700276500010100293650006200394Para_3270CHAP220125s1917    xx            000 0 und d  a201758  cCHAP  aPA-C 595.77 D5  aMetcalf, C. L.  aSytphidae of Maine second report :b life history studies  /c C. L. Metcalf  aOrono, Maine  :b Agricultural Experiment Station  ap. 153-176 + 5 láms.  aDíptera; 5  aEncuadernado con: Notes on american two-winged flies of the family sapromizidae/by J. R. Malloch  aDípteros x Colecciones de escritos  Syrphidae x Maine