TY  - BOOK
AU  - Murphy,Helen Elizabeth
TI  - Notes on the biology of some of our North American species of May-flies
T2  - Bulletin of the Lloyd Library of Botany, Natural History, Pharmacy and Materia Medica,
AV  - AS36 .L592 no. 22
U1  - 396.8L77 no.22 
PY  - 1922///]
CY  - [Cincinnati
KW  - Mayflies
N1  - Descriptive letterpress on versos facing the plates; Contribution from the Limnological Laboratory, Cornell University; Also issued as thesis (PH. D.) Cornell University, 1920; Bibliography: p. 23-26; I. The metamorphosis of May-fly mouth parts.--II. Notes on the biology of May-flies of the genus Baetis
ER  -