THE STATE ENTOMOLOGIST. 81 



obsolete on the thoracic segments, and most conspicuous on 10 and 

 11 — running just below the spiracles, and interrupted by the trans- 

 verse orange band. 



I quote here Harris's full description of this larva (Correspondence, p. 286), as it agrees with 

 mine, except in giving the number of transverse black lines as 6 on each segment, instead of 8, 

 from the fact that he does not include the two which border the orange band, on account of 

 their being interrupted. I have preferred to consider each segment of this worm as 8-banded, to 

 distinguish it more readily from the other two species, which have respectively only six and four. 

 " Length, when at rest, one inch and two-tenths, very pale blue, transversely banded with orange 

 on the middle of each segment, the bands dotted with small black points, producing hairs, and 

 surmounted by black lines, and between each of the bands six transverse black lines. A large, 

 irregular, white spot on the side of the tenth and eleventh segments, and a series of smaller white 

 spots on each of the other segments except the first three. Head orange dotted with black. Legs 

 tlackish externally. The full-grown, have a decidedly bluish tinge, entirely owing, however, to 

 an optical phenomenon from the contrast of the white with the transverse black lines. The head 

 is of a pale dirty orange or rusty yellow, with about eight black dots on each side ; [about 10 

 large and 14 small dots in all,] a semicircular plate on the top of the first segment and the anal 

 valves are pale orange dotted with black. There is a transverse series of black dots on the second 

 and third segments, without an orange band. Each of the other segments is transversely banded 

 with orange and dotted with black ; the dots being in two alternate rows, and all of them emitting 

 distinct, long whitish hairs. [The anterior dots on the back of segments 4, 5 and 6 and the pos- 

 terior ones on 11, are considerably larger than the rest]. Between each of the bands there are six 

 slender, continuous, black transverse lines. The points are also connected by interrupted black 

 lines. Legs at base orange, black externally and at tip, except the anal pair which are orange, 

 dotted with black. The large white lateral spot is common to the side of the tenth and 

 eleventh segments. The other lateral white spots are situated immediately behind the bands on 

 the fourth, fifth, sixth, seventh, eighth and ninth segments, the anterior spots being largest ; and 

 thence they diminish to the ninth, while again the posterior spot is very large and very distinct. The 

 orange bands are interrupted on the top of the seventh, eighth and ninth segments." 



This larva transforms to chysalis within a very slight cocoon 

 formed without silk, upon, or just below the surface of the earth, and 

 issues soon after, as a very beautiful moth of a deep blue-black color, 

 with orange shanks, yellow shoulder-pieces, each of the front wings 

 with two large light yellow spots, and each of the hind wings with 

 two white ones. The illustration (Fig. 55, c) represents the female, 

 and the male differs from her in having the wing spots larger, and in 

 having a conspicuous white mark along the top of his narrower ab- 

 domen. 



I have on one or two occasions known vines to be partly defoli- 

 ated by this species, but never knew it to be quite so destructive as it 

 is represented in the following communication from Mr. W. V. An- 

 drews, of New York city, which I take from the February (1869) num- 

 mer of the American Naturalist : 



"That a man should desire to raise his own Isabellas is laudable 

 and praiseworthy ; and I see no reason why such desire should exist 

 exclusively in the breasts of our bucolic friends. The inhabitants ot 

 New York, as a general thing, clearly are of the same opinion, as is 

 evidenced by the number of grape-vines ornamenting the doors and 

 trellis-work of the houses of our citizens ; not, of course, in the be- 

 nighted regions of Wall street, but up-town ; say from Sixteenth 

 street northward. A friend of mine residing on Thirty-fourth street, 

 showed me, in March last, a very fine vine, which he calculated would 

 produce him sundry pounds of choice grapes, and in the pride of his 



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