Excerpt from The Canadian Entomologist, 1888, Vol. 20

After first moult, in spring Length. II inch 5 color brown-green 5 the spines in number and position as at maturity, and as in'the genus, black, as well as the tubercles from which they spring 5. Beset with many short divergent, black bristles 5 head obovoid, black, with black hairs. Dura tion of this stage about [0 days.

After second moult Length 16 inch 5 color gray-black with a green tint over upper side 5 under side pale green 5 the spines black, With black bristles 5 all the tubercles pale yellow; head as before, black. To next moult about I4 days.' After third moult: Length 32 inch 5 color gray mottled with black° a double dorsal stripe Of gray 5 spines black 5 the bases of dorsal rows black on dorsal side, but yellow on outer side 5 of middle and lower rows dull yellow; head as before, but reddish-yellow, the back less red, more yellow. To next moult about IO days.

After fourth moult Length 5 inch 5 very much as at last previous stage, the dorsal lines same, spines same. To next moult about 6 days.

After fifth moult: Length 74 inch 5 slender 5 color brown-black, with a dorsal band of grayish-brown and not Clearly defined markings else where 5 these markings became distinct as the stage progressed.

Mature larva. - Length I. 5 inch 5 slender, somewhat thickened in middle, the segments well rounded 5 on dorsum a broad greenish - yellow band, with a black line through the middle, edged by a little green 5 a narrow greenish-gray band between the dorsal and middle rows of spines, and a short band between the base of each dorsal spine and the next in advance of the middle row 5 these gray bands are Of irregular width and the edges are whitish 5 the spaces between the bands brown-black; the sides, from middle row to the outside of lower row, gray with a rust-red tint in the middle of this area, and below to feet a darker, or more brown shade of gray 5 the spines are rather slender, swollen next base, above this tapering to a small conical top, from which proceeds a straight bristle a few bristles about the sides, each from a tubercle, and standing at about 45° With the axis of its spine 5 the dorsal row are gray, the middle row gray tipped with rust-yellow, the lower row all rust color of deep Shade 5 feet black, pro - legs gray - brown; head sub-cordate, the vertices rounded 5 color dull dark brown in front, dull yellow at back, with many short black hairs. From fifth moult to pupation 9 days.

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