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Psyche 6:94, 1891.

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94 PSYCHE. [June I 891.
DESCRIPTION OF THE PREPARATORY STAGES OF CALLOSAMIA PROMETHEA DRURY.
BY WM. BEUTENMULLER, NEW YORK.
Egg-- Oval, slightly flattened above and below, sordid white. Height 1.20 mm. Width r.p mm. Laid June 14. Emerged June 24.
Larva : First stage.-Head dull black with a sordid white transverse band across the middle. Body greenish yellow with a trans- verse black band on the anterior and posterior portions of each segment, running to the sides.
Along the dorsum are two rows of tuber-
cles, and a row along the subdorsal and
another row along the sides below the spira- cles. All the tubercles are yellow, except those on the first segment and the two dorsal pairs on the second and third segments and those on eleventh and twelfth segments,
black. Each of the tubercles are also fur- nished with about five bristle-like hairs, which are black. Length 3 mm. Duration of this stage seven days.
After first moult.-No change except that the larvae are more conspicuous. In some individuals of the brood the two tubercles on dorsal region on the second and third segments are yellow instead of black as in the previous moult. Length 10 mm. Dura-
tion of this stage five days.
After second moult.-The body is now
whitish green, with the tubercles black, ex- cept the two dorsal pair on the second and third segments and the one on the eleventh segment bright yellow, with their bases
black; these six tubercles remain present in all the subsequent stages, while all the re- maining tubercles gradually become reduced into mere piliferous spots. Anal plates yel- low margined with black.
Head yellow, with
a black transverse band and a black spot on each side of the top. All the feet yellow, abdominal ones with a black spot on the
outer side of each. The transverse bands across the segments are now quite faint, and in some specimens they are broken or ab- sent. Length 20 mm. Duration of this
stage four days.
After third moult. -The body color is
the same as in the previous moult. The
four tubercles on the second and third seg- ments are now bright orange yellow and
the one on top of the eleventh segment
lemon yellow; all other tubercles black and much smaller than the ones just mentioned. Thoracic feet and anal legs yellow, abdominal legs same as in the last stage. Head yellow with two black spots on each side. Length 24 mm. Duration of this stage three days. After fourth moult.-Body entirely green, with a whitish hue. The transverse bands have now disappeared. The four tubercles on the second and third segments are now quite prominent, coral red, and the one on the eleventh segment lemon yellow. All the other tubercles are reduced to mere pilifer- ous spots. Head and legs yellowish green. Length 30 mm. Duration of this stage five days.
After fifth or last moult.-Same in all re- spects as the preceding moult, except that the larva becomes stouter and more prominent in appearance. Length 39 mm. The full
grown larva meahures about 55 mm. Dura-
tion of this stage five days.
Food-plants.- Sassafras, tulip-tree, linden, spicebush, sweet-gum, choke-cherry, plum, pear, ash, Magnolia, Halesia, etc.
The early stages of this species were made first known by Dr. C. V. Riley, (4th Mo. rep. p. 121) who gives only four moults, while the brood I raised moulted five times. The mature larva was first figured by Abbot and Smith (Ins. Ga., v. I, p. 91, pi. 46) and again subsequently by various writers.




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