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 Zebra Swallow-Tail (BB Front wings not crossed)

BB. Front wings not crossed by bands of greenish white. C. The larger part of the disk of the wings yellow. (P. glaucus), p. 51.

THE TIGER SWALLOW-TAIL (Turnus Form).

CC. The larger part of the disk of the wings black.

D. Principal markings of the upper side of the front wings nearly parallel with the costal margin; wings black above, yellow beneath. (P. thoas), p. 56.

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