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The Lepidoptera of New York and neighboring states. Part II...
By Forbes, W.T.M.
Cornell University Agriculture Experimental Station Memoirs, 274: 1-263, 1948
Cite: 1651685 with citation markup [cite:1651685]
Forbes, W.T.M., 1948. The Lepidoptera of New York and neighboring states. Part II. Geometridae, Sphingidae, Notodontidae, Lymantriidae. Cornell University Agriculture Experimental Station Memoirs, 274: 1-263.

cite:1651685

Wow!
I have the original; far easier to read this digitized version on my 27" monitor.