MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 227 



for an opportunity of examining the specimens when they were in the collection of the United 

 States Entomologist, Department of Agriculture, Washington. 



Stage II f — Length, 6 mm., probably not long before molting, as the head is as wide as the 

 body; it is rounded, of abnormal shape, not squarish on the sides. The piliferous warts on the 

 head are minute, but bearing long bristles, and connected by broad, dark brown bands. Forming 

 a rude Greek cross on each side of the vertex and on the side below are three dark spots, two on 

 the back side and one near the clypeus; the sides of the latter dark, forming a V. 



On the body the piliferous warts are rather large and high, especially the dorsal ones. The 

 dorsal prothoracic tubercles are conical, rounded, twice as large as those on the second and third 

 thoracic segments, and deep reddish around the base. The two dorsal warts on the first 

 abdominal segment are as large or slightly larger than those on the first thoracic segment, and 

 somewhat forked at the tip, which is dark, giving rise to two bristles. The eighth abdominal 

 segment is gibbous on the back, bearing the dark red tubercles, which are slightly larger than 

 those on the prothoracic segment, and which are simple, not forked, and reddish above the base. 

 The suranal plate is rounded, bearing a few high slender conical setiferous warts. The anal legs 

 are long and slender, reddish, extending well beyond the suranal i^lale. The body is green, with 

 yellow markings, with two interrupted broad yellovr bands, which are in fact broken into a series 

 of irregular spots. From the first thoracic segment two parallel, nearly contiguous, red dorsal 

 lines extend to the dorsal tubercles on the first abdominal segment, and inclosing a fine broken 

 yellowish line. A similar pair of red lines, but broader and more diffuse, ou the last third of the 

 body. The setie are glandular, slightly enlarged at the tips. (The specimen, alcoholic, is not 

 well preserved.) 



Stage HI. — Length, 10 mm. The head is rather large, broader than the body, while the sides- 

 are now somewhat squarish. The origin of the lateral dark and white line is now seen to be thus: 

 The front is rather broad and flattened; on each side is a slightly curved row of about five dark 

 piliferous warts, which are connected by an irregular dark band, which begins on each side of the 

 vertex and curves around to the sides of the labrum. This line is broadly bordered by a whitish 

 band, and outside of this are three black blotches. The sutures of the apex of the clypeus are 

 broadly stained with black-brown, forming a V, as in the second stage. Piliferous tubercle* 

 as in Stage II, but now the bristles taper to a point, though large and coarse, and the bases of 

 those of the first thoracic and first abdominal tubercles are reddish, those of the others yellowish. 

 The twin dorsal reddish lines are more distinct, and now there are two distinct, broad, subdorsal 

 ■white bands, containing on the inner side the dorsal tubercles, whose bases are yellowish. A 

 spiracular, narrow, straw-yellow line, passing just above the spiracles and partly inclosing them. 

 The anal legs are reddish, but no reddish spots or dots yet appear on the sides of the body, as 

 they do in the next stage. Ou the third abdominal segment, is a large, dark, setiferous tubercle, 

 ■which is reddish at base; it is one-half the size of that on the first segment. 



The following description is drawn up from Comstock's type (No. 4455, " From eggs on oak, 

 D. C, June 24, 1889"), var. 6. One or two were in tlie fourth stage and the others fully grown. 

 Length, 32-34 mm. They (the full-grown ones) have the dorsal region between the subdorsal lines 

 deep, continuous carmine or dull blood-red. The six thoracic piliferous warts are yellow, the 

 dorsal lines white, the subdorsal one white, more or less tinged with straw-yellow, two well- 

 marked lateral yellow lines, the supraspiracular being narrower than the lower ones. Below the 

 lower line the sides of the body are more continuously blotched with carmine-red than usual. 

 The lateral lines on the head are as usual black, edged externally with white. The base of the 

 mandibles and of the anteunaj arc tinged with yellow. The bristles are as usual long and stiff. 



In two full-grown H. manteo, 35 mm. long, Department of Agriculture, "No. 359, 0." (pi. 

 XXIX, figs. 3, 3a), kindly lent by Dr. Eiley, the coloratioual characters often, though not always, 

 Been in Stage IV are retained, the red filling up the space between the subdorsal lines, passing far 

 down in great lobes on the sides of the abdominal segments 1, 3, and 6, those on segments 3 and 

 6 being the largest, and partly inclosing the spiracles. T je tubercles are small and normal, i. e,, 

 as in the mature larvre generally. 



In one larva, 359&. 45 mm. long, the space between the two subdorsal lines is filled in solidly 

 with deep, dull blood-red, only interrupted by the dorsal yellow line, while the two lateral yellow 

 lines are distinct. 



