312 



white stripe on each side of the back, longitudinally divided by a slender 

 dusky or grayish line. The whole stripe is indented on the upper side on 

 each segment by the transverse, dorsal lozenges, of which there is one of 

 a deep velvety black color on every segment except the first three and 

 last two; there being seven of these lozenges, each one with two rust 

 red spots on it, forming a longitudinal row, and lour polished, whitish 

 tubercles, two and two. Eleventh segment with a somewhat pyramidal, 

 opaque, black, wart-like prominence, having four minute, black, pilifei-ous 

 tubercles on it. First three segments each with four blackish, piliferous 

 tubercles. Head black, polished, indented on the top, the hairs of fore 

 part of the body curved over it, a row of minute, piliferous tubercles on 

 each side of the body, one above and one below each spiracle; the latter 

 are black. Hair cojjIous at sides of body. Legs black, prolegs grayish 

 black. Cocoon covered with a leaf, Sept. 30, 1847. 



Abridged description. Bluish gray, with a white stripe on each side of 

 the back, a dorsal series of seven black lozenges, each having two rust red 

 spots and four whitish, piliferous tubercles. A pyramidal black wart on the 

 top of the eleventh segment. Head and prolegs of polished black. Sides 

 of the body hairy. 



Aeronycta ulmi Harr. mss. [PI. iii, fig. 10.] 



Sept. 13, 1841. Found resting extended on the trunk of an elm. 



Greenish yellow, variegated with dusky on the sides, with yellowish lat- 

 eral warts, two zigzag, dorsal, black lines inclosing a paler, dorsal line, and a 

 series of dusky, oval spaces; a tubercle surmounted by four little black 

 warts on the fourth ring, another on the seventh ring, and a third on the 

 eleventh ring. Head black; legs black; body beneath and prolegs greenish 

 yellow. 



On each ring three warts on each side; those on the first ring are 

 dii'ected forwards, and produce long hairs also curving forwards ; the 

 .tubercles arc pale yellow and large, one above, and two below the spiracles, 

 which are black. On the first four rings a dusky, lateral, broad stripe be- 

 tween the two upper tubercles; behind the fourth ring the dusky stripe 

 becomes spread and broken into little spots or lines between the tubercles; 

 moreover, the sides are sprinkled with minute yellow warts, which produce 

 very short, gray, truncated hairs; the yellow warts furnish bunches of much 

 longer, tapering hairs; on the top of the back is a grayish line caused by a 

 continuous I'ow of short, truncated hairs of tjiis color behind the fourth ring; 

 before it the line is distinct and not so hairy. The whole back is marked 

 by a dusky row of ovals, externally bhu'k, internally brownish; and on the 

 fourth, seventh and eleventh rings, as before said, there is a hump sur- 

 mounted by four black warts, In a transverse line on the fii-st two humps, 



