IN THIS ISSUE
Date of Publication: September 1967
| Origin of autumnal 'false broods' in common Pierid butterflies | A.M. Shapiro | |
| The Lepidoptera Research Foundation, Inc. | ||
| Polyctor polyctor in Mexico | H.A.Freeman | |
| Ecological color variation in some Argynnis of the Western United States | W. Hovanitz | |
| Natural habitats | W. Hovanitz | |
| Estimating the density of an animal population | William R. Hanson |
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