MEMOIRS OF THE NATIOXxVL ACADEMY OF SCIENCES. 
219 
two thread lines which converge a little to meet the broad single band on the second and third 
thoracic segments, and including the two concolorous tubercles, which are dark at the tip, and are of 
the same size but farther apart than those on the eighth segment. On the tirst abdominal segment 
the red baud breaks up into two siibdorsal lines which i)ass into the blood-red, transverse, broad 
baud on the third abdominal segment, which extends down each side of the segment. On the 
fourth and fifth segments are two parallel red lines, and on the sixth the broad single dorsal band 
passes down on each side, forming a lateral lobe not quite so large or so full and rounded as that 
on the third abdominal segment. This broad median, blood-red baud contracts on the seventh and 
eighth segments, where it ends. The anal legs have a reddish line on each side. A fine irregular 
lateral yellowish line passes along the lower end of the spiracles, and there are faint indications 
of an upper lateral parallel yellowish line, which are most marked in front. 
Piliferous warts: None on the first thoracic segment; two minute dorsal ones, all of the same 
size, on the second and third thoracic segments. Those on the first and eighth abdominal seg- 
ments are largo and ecjual in size: those on the second and third abdcininal segments are a little 
larger than the others. The hairs on the dorsal warts are dark, those on the sides pale. 
Stage lY {?), — Length, 15 mm. About to molt. The head with its dark lateral lines as 
before; the tubercles as before, hut those on the first abdominal segment are rather larger and 
more prominent than those on the eighth segment. The two lateral lines on the second abdominal 
segmeiit are much wider, so that the inclosed S])ace is very narrow, and the broad transverse 
reddish band on the third abdominal segment is interrupted in the middle by a whitish green 
baud which extends back niore or less interrtiptedly to the seventh segment, on which it forms a 
broad, green, oblong spot, the green edged with white and inclosing a median line. The reddish 
band extends on each side of the ninth segment, and on the suraual plate is a lateral reddish, fine, 
broken line and a median whitish line. The anal legs are much as before. Two well-defined 
lateral yellow lines, while the body is more spotted along the whole length than before. The 
spiracles are itale reddish. The thoracic and abdominal legs are green. This larva is much like 
the drawings made by Bridgham (PI. XXXY, fig. .^). It molted, after two days’ rest, July 14; on 
July 20 it began to pupate when 25 mm. long. 
Last stage , — Length, 25 mm. Head xiale greenish, with a single dark purplish curved line on 
each side, not edged with white. Sides of the body greenish, speckled with reddish. (As the 
markings are not yet distinct, a further descri])tion could not be made.) 
Full-fed larva , — One occui'red on the elm August 30, at Providence (Bridgham); length, 27 
mm. Head clear pale pea-green (not mottled with purplish), but the dark purple and white line 
is present on each side. No broad purplish discal band, the space inclosed by the white lines 
being whitish pale pea-green, and with a median white line beginning on the third thoracic segment. 
The dorsal an.d lateral piliferous warts are yellowish. The two subdorsal white lines extend out 
to the tip of the anal legs. 
A full-grown larva received from Miss Caroline G. Soule July 24, from Brookline, Mass., on 
the 26th of July began to form a cocoon on the bottom of the breeding box. Length, 30 mm. 
Head greenish, finely mottled and netted with purplish; a faint dark purple line broadly edged 
behind with white. Two white subdorsal lines, very <listinct on the abdominal segments and 
inclosing a broad purplish dorsal band, the two lines finely and faintly edged with reddish purple, 
and contracting a little on the somewhat humped eighth abdominal segment. The retractile anal 
legs have on each side a reddish purple line. The piliferou.s warts are all white, the hairs pale 
brown. A single yellowish spiracular line, most distinct on the thoracic segments. A second one 
not so distinctly marked and wanting the white edging of the lines on the head. 
I have introduced these descriptions of Seirodonta hilineata and very carefully compared the 
alcoholic larvie with those of Heterocam ga manteo without as yet being able to detect any dilference 
between these, except that in some individuals there are but two segments red on the si<le, where, 
as in H, manteo are three segments thus marked, though the moths differ in generic and 
specific characters. 
On PI. XXXY are represented the earlier larvml stages of what I suppose to bo this species 
rather than any of Heterocampa, as it fed on elm leaves. It will be seen that in the earlier stages 
this genus is a Schizura rather than a Heterocampa, and it is thus a connecting link between the 
