8 
Journal New York Entomological Society. 
[Vol. IV. 
on the short ones. Width of the head 1.4 mm. (calculated 1.47). 
Length of the larva 9.5 to 13 mm. 
Stage VII .—As in the preceding stage. Stage VII differs from 
the last stage (VIII) as follows : The horns are longer (compare figs. 10 
and 9) and their skin spines shorter (Plate I, figs. 22 and 13). The 
purple brown color is less extensive, being absent from the subventral 
area and the posterior end of the body, confined to the regions described 
above, and its tint is rather paler. The patches of “caltrope” spines 
are present, but smaller than in the last stage and there are no tufts of 
detachable spines. The long horns grow from 3.5 mm. to 5.8 mm. 
during the stage and are suddenly shortened to about 2 mm. at the last 
molt. Width of the head 2 mm.; length of the larva 13 to 18 mm. 
Stage VIII .—(Plate I, fig. 16). Head beneath joint 2, but 2 not 
beneath 3 ; joints 3 and 4 somewhat folded. Dorsum rises nearly per¬ 
pendicularly in front, rounds over at joint 5, slopes gently and slightly 
to joint 11, and is then nearly perpendicular to the anus. No subdorsal 
ridge, the body evenly rounded, the sides almost perpendicular. On 
joints 3, 4, 5 and 11 a pair of suborsal fleshy processes, furnished with 
long stiff spines, salmon colored with black tip (Plate I, fig. 4) ; among 
them a very few spatulate setae (Plate I, fig. 14). The processes on 
joints 3 and 4 are short, those on joints 5 and 11 long (2 to 3.5 mui.), 
on joint 12 small and still smaller on joint 13. A similar lateral row on 
joints 3, 4, 6 to 12, all short. On joint 12, above the lateral process, 
and on 13 anterior to it, is an elevated velvety brown spot, composed of 
closely set, detachable spines (Plate I, figs. 7, 23 and 24; fig. 8 shows 
the appearance of the skin after these spines are detached). These 
spines have a pale yellowish shaft and brown-black tip. Body smooth 
to the naked eye, under a lens finely spinulose (Plate I, figs. 11, 12 and 
13) with paired dorsal and two lateral rows of intersegmental shallow 
pale-colored pits. Color dark purplish vinous; a pale yellow, elliptical 
spot dorsally on joints 5 and 11, edged with blackish ; a much larger 
similarly colored one on each side subdorsally behind the large horn on 
joint 11; a large bright green patch covers the back and sides of joints 
6 to 10 like a blanket, extending on joints 11 and 12 laterally, and 
leaving an elliptical patch of the ground color dorsally on joints 7 to 9 
like a hole in the blanket. The blanket patch is narrowly edged with 
black and broadly with white. Head pale greenish, eyes black, mouth 
brown; width 3 mm. The anterior edge of joint 2 bears many setae, 
and there is a group of them before the spiracle. Cervical shield a 
skinny area with a few punctures on its anterior border, square behind, 
