01174cam a22002891  4500001001300000003000400013005001700017008004100034010001700075035001900092040004100111042001200152050002300164082001900187100003600206245010000242260002400342300003500366490012800401500005700529500007100586500006100657504002800718505010900746650001400855999001500869agr23000556 DLC20260227110943.0791112s1922    ohuaf    b    000 0 eng c  aagr23000556   a(OCoLC)5685367  aU.S. Dept. of Agr. LibrarycViUdDLC  apremarc00aAS36b.L592 no. 22  a396.8L77 no.221 aMurphy, Helen Elizabeth,d1892-10aNotes on the biology of some of our North American species of May-flies.c[By] Helen E. Murphy.  a[Cincinnati,c1922]  a46 p.billus., plates.c27 cm.0 aBulletin of the Lloyd Library of Botany, Natural History, Pharmacy and Materia Medica,vno. 22. Entomological series, no. 2  aDescriptive letterpress on versos facing the plates.  aContribution from the Limnological Laboratory, Cornell University.  aAlso issued as thesis (PH. D.) Cornell University, 1920.  aBibliography: p. 23-26.0 aI. The metamorphosis of May-fly mouth parts.--II. Notes on the biology of May-flies of the genus Baetis. 0aMayflies.  c8842d8842