MKMOIKS OF THE is'ATlOXAL ACADEMY OF SCIENCES. 
269 
■white ; extrahimlar line of five elone^ large hlaelc (lofn^ the line iuterrupted as if a dot on the 
subcubital fold had dropped out. The black median hand imimiallg broad and straight on each 
side^ with a distinct, firm, black edge on each side, especially within, and the band is thickly dusted 
with white scales. A heavy outer liarallel line close to the band, slightly sinuous, beginning on 
the inner edge and ending on the first cubital venule. A distinct scallo])ed white extradiscal 
line, edged with black on each side, and an inner faint dusky line between it and the discal si)ot, 
the latter being elongated and distinct. The usual subapical triangular patch extends backward 
farther than usual, being continuous with the outer of the extradiscal lines. Marginal black dots 
distinct. 
Hind wings white, a large difiiise discal dot, marginal black dots distinct; a small dark patch 
on internal angle. Underside of fore wings dusky, the outer edge of the wings a little whiter; the 
white extradiscal line api)ears through. Hind wings white, with a large diffuse discal oval mark 
and distinct dots. 
Exi)anse of wings, S 30 nun. ; length of body, S 14 mm. 
This fine species is known by the broad black band, dusted with white, and distinctly edged 
with black within and without; by the extrabasilar lijie of five large crowded dots, and by the 
distinct white scalloped broad extradiscal line. Lintner says that in resi)ect to the extrabasilar 
row of five dots it does not iliffer from agnilonarifi, but thus far I have not seen an examiile of the 
latter with more than four dots, the row not being so crowded. 
Larva^ Biage II. — Length of body, 11 mm.; of stemapods, 8 mm. It differs from the foregoing 
species of the same stage in wanting the frontal tubercles of the he-ad, which is paler, and in the 
longer and slenderer prothoracic horns, the latter having smaller spines; it is also yellow 
beneath. The spines on the stemapods are finer. There is more j^ellow on the sides of the body, 
the yellow extending along the sides of the stemapods. 
Stage III. — Length of body, 15 mm.; of stemapods, 4 mm. It differs from the third stage of 
Cerura borealis in the longer cervical shield and the shorter horns, so that the shield is more 
normal in shape, being as usual in many catei'xiillars. The piliferous warts over the body are a 
little larger, while the dorsal reddish saddle-like spots are more definitely line<l with deep red. 
Larva. — Length when .fully grown, 1,25 to the fork of the tail. Body slightly enlarged in 
front and somewhat compressed. In about the middle of the prothoracic segment is a prominent 
l>rojection on each side, the body sloping from these down to the rather small head; there is but 
little sloping from the back to segment 9; from this there is a rapid sloping to the anal segment, 
this ending in the two usual caudal filaments; when withdrawn these are a little more than a 
quarter of an inch long, but may be extended to three-quarters. Clear bright green, sides spotted 
with clear piirple brown, the spots round the stigmata and at the base of the thoracic and abdom- 
inal legs the largest. The baidc is marked with lilac, varying in shade, and arranged as follows: 
From the two small contiguous tubercles on the back of joint 2 to Ihe head is a somewhat 
diamond-shaped space, the broadest i)art at the subdorsal tubercles on the i>rothoracic segment. 
From the tubercles on this segment to those on the next the lilac is bordered by bright brownish 
])iu‘ple with a white line; outside of thivS, in the middle of this diamond, is a little green shading. 
From the tubercles on the second joint from the head to the end of the body is another i>arti- 
colored space, lighter than the anterior one. This gradually expands so as to include the 
stigmata on segment 7, then decreases in width to the anterior part of the anal segment, 
expanding a little in the middle of this, but contracting again at its posterior part. The lilac of 
this is like the first, considerably suffused with green on the back, and is bordei^ed with brownish 
purple and Avhite, though the colors are a little lighter posteriorly. These two dorsal patches are 
not continuous, but are separated on the second segment by a distinct though small patch of 
green. The x>osterior x>rojections are mostly brownish i)urple, though with somewhat greenish 
annulations, and when extended a ring of white near the extremity. Head dark lilac. Previous 
to the last molt the tubercles on the prothoracic segment (“joint 1’^) were covered with little 
si)ines (French, Can. Eut., xiii, 144.) 
Tood plant. — Willow. 
Habits. — The caterpillars of this moth were found feeding on willows {Salix nigra) by Frof. 
G. II. French, at Carboiulale, 111., from September 9 to October 5. The moths began to appear the 
following season from Ax)ril 30 to June 3. In Maine it occurred on the willow throughout August. 
