IN THIS ISSUE
Date of Publication: March 1964
| The effects of pH on the distribution of the Megathymidae | H.A. Freeman | |
| Decapitation - initiated oviposition in Crambid months | C.S.Crawford | |
| Book review - Fox and Fox: Introduction to Comparative Entomology | ||
| Life history studies on Mexican butterflies I. | Gary N. Ross | |
| Book review - Dos Passos: Synonymic list of Nearctic Rhopalocera | ||
| Melanic tendencies in Phalaenid and Geometrid moths in Eastern Pennsylvania | A.M. Shapiro | |
| The genus Lycaeides in the Pacific Northwest | J.H.Shepard | |
| The origin of a sympatric species in Colias through the aid of natural hybridization | W. Hovanitz | |
| The southern limits of the range of Pieris napi and Pieris virginiensis | B.Mather | |
| Life history of Papilio indra and P. oregonius | E.J.Newcomer | |
| Hybrids between Papilio memnon and Papilio protenor | S.A. Ae | |
| New gynandromorph of Colias philodice from Colorado | T.C.Emmel |
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