How to Know the Butterflies

The Cornell classic that taught America to name what it saw: every eastern butterfly described from life, with its caterpillar, its food-plants, its habits — and how to pronounce its Latin.

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The Tiger Swallow-Tail (Glaucus Form)

(Glaucus Form).

FF. The yellow spot in cell R₁ on the upper surface, if present, of the same color as the submarginal row of spots. (P. polyxenes), p. 62.

THE BLACK SWALLOW-TAIL (Female).

AA. Without a red or orange-colored spot on the upper side of the hind wings near the anal angle; club of antennæ not curved upward. (L. philenor), p. 66.

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