d in general color, being either yellow, brown, grayish, or olivaceous, and some specimens much resembling certain forms of our Polyphe- mus. According to the testimony of those who have had most experience with this species in Europe, coition invariably takes place at night, and lasts but a… … The life of the worm lasts from 50 to 80 days, and it feeds Fig. 4.—RESEMBLANCE OF THE WORM, a, TO THE LEAF. effects of ordinary gas on vegetation. Gas was conducted on all kinds of oak, but prefers those of the white oak group. through pipes to the roots of various trees continuously for of each…
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