MEMOIRS OF THE ^'ATIONAL ACADEMY OF SCIENCES. 239 



broad wliite dorsal striix', coiitractiuj;' toward the horns, becoiiiiny narrow behind tliein, but 

 widening- to the tiiird abdominal segment, contracting to a yellowisli point on the hinder edge of 

 the fourth segment, where a second white band begins in a yellowish i)Oint, and is widest on the 

 sixth segment, becoming forked on the last four abdominal segments. The snranal plate is white 

 above; the anal legs white above, lined with red. On the sides of the third thoracic segment is 

 a short curved red line. A large, broad oblicpie stripe, lined with red and wliite, on the side of 

 the fourth abdominal segment. The thoracic legs are stained witii pale red; the middle 

 abdominal legs arc pale green, stained with red above the planta-. The sides of the body are 

 finely dotted with dark bloodred. 



Last .stage. — Described August 11. Length, 24 mm. Head high, conical, ending on the vertex 

 in two rounded tubercles, which are blackish: sides of the head reddish brown, the color of a 

 dead maple leaf; extending nj) and down the front is a white median band, including the labrnm 

 and clypeus, and extending back over to the white dorsal band beginning on the prothoracic 

 segment. Body of a delicate pea-green, with the characteristic white dorsal band, and on the 

 sides of the third thoracic and first abdominal segments the obli(iue sere-brown patch inclosing 

 the tirst abdominal spiracle. A second large sere-brown patch on the side of the third abdominal 

 segment, extending forward upon the second, and backward, forming a larger spot on the fourth 

 segment. A third obliiiue serebrowu patch is situated on the side of the sixth segment, inclosing 

 the spiracle and partly, like those in front, edged irregularly with a darker reddish brown tint. 

 The white dorsal baud is a.s before, but more pronounced, being wider and more continuously 

 edged with reddish brown. There are tine concolorous dots scattered over the sides of the body. 



A larva whicli Dr. Dyar thinks may be a variety of //. hiundala was observed on the red oak 

 at Brunswick, Me., August 27. Length, 35-40 mm. The liead is not so wide as the body, greenish, 

 with a pink stri|>e on each side. The body is thickest in the middle, a double dorsal pinkish 

 brown .stripe inclosing a median white line and extending ui)on tlie first abdominal segment. 

 There are two subdorsal yellowish stripes which are interrupted on the third abdominal segment, 

 whicli is pinkish brown on the sides, but not above, while the succeeding segment is brownish 

 above but not on the sides, being bounded laterally by a yellowish line. On the fifth abdominal 

 segment is a broad dorsal, V-shaped, brown spot, the apex pointed anteriorly. Segments 7 and 8 

 with a dorsal brown patch. On the last segment are two narrow brown lines. The sides of the 

 anal legs are rusty reddish brown ; an oblique reddish brown band extends from the first abdominal 

 upon the third thoracic segment and incloses the first abdominal spiracle; the thii'd spiracle is 

 included in an obli(pie brown band extending from the brown dorsal spot above. An oblique 

 lateral brown band on the sixth abdominal segment, and on the seventh and eighth is a lateral 

 oval concolorous spot connecting the two segments. The ground color of the body is pea-green, 

 siieckled finely and densely with black. 



The rust-red brown spots are of almost exactly the sauie hue as the rusty sere spots on an 

 oak leaf, and it is thus at first difficult to detect the larva when feeding on the edge of a leaf. 



This larva is, I am quite sure, the final stage of II. biunduia ( Fl. XXXII, figs. 2, 2a), as I have 

 found it during the itast season on the ; eil or rock maple. One fi)iind August 28 was without the 

 obli(pie pale brown line on the third thoracic and first abdominal segments, and also -without 

 the brown spot on the side of the sixth abdominal segment. ' 



' The following description is drawn up from a specimen sent me by Dr. Dyar, which proves to be H. hiwndata: 



Length, 35 iiiiu. The he;>d is not so wide as the body. Width. 4 mm. It narrows above more than usual, so 

 that at the vertex it is scarcely more than one-fonrth as wide as below. The sides are iingular. The vertex is 

 bilobcd, ending in two well-marked conical tubercles, which are black at the end, but not )iiliferous. 



The head is whitish, polished greenish, with a faint jiurplish tinge. The region in front and on each sida of 

 the clypeus and from there to the vertex is polished greenish, without the purplish tint. 



The body in general is entirely free from pilifercuis warts or humps. There are four minute piliferous warts on 

 the first thoracic segment, which is normal. The body is spindle shaped, tapering toward each end, posteriorly to 

 the anal legs, which are small, weak, and p(dished faint iiurplish. The suranal plate is small, rounded behind, 

 smooth, with two dark dorsal stripes. The body is pale green. As the example before me is full-fed and about 

 ready to pupate, it is faintly marked with sere and brown, pale raw sienna on tlie sides of the first abdomiual 

 segment, with a small patch, and on tlic sides of the sixth abdominal segment, while the sides of the third and 

 fourth, the whole of tlie third, the spot encroaching a little on the second segment, are washed with the same pale 

 brown or raw sienna tint. (Dr, Dyar suggests that the white dors.al marks must have been lost ou. account of the . 

 approach of pupation.) 



