IMKMOIKS OF THE NATIONAL ACADEMY OF SCIENCES. 
271 
on the costa, a laint narrow line, curved inwardly aronnd to the first cubital branch, curves inward 
between the first and second cubital branches, outward below the third cubital venule, ending- 
in a black dot at the internal angle. A large, conspicuous, oblique, steel-blue black costal patch 
extending inward and downward to the first cubital venule; a row of intervenular marginal 
black dots. 
riind wings white, with a discal dot, and a dark spot on the inner angle. Fringe white, with 
black dots. Beneath white, the dark patches and band showing tln^oughj the discal dot is 
distinct, especially on the hind wings, and there is a curved extradiscal narrow dusky line. Tarsi 
black, ringed with white. 
In a type specitnen from Plattsburg named by Mr. G. H. Hudson (in United States National 
Museum), another from Providence, B. I., which is more rubbed, the median band is much broader, 
scarcely contracted in the middle. 
In a series of six 8 8 from Colorado in the museum of Brown University, presented by Mr. H. 
L. Clark, one closely approaches 0. cinerea in its white color and in having the black thorax nearly 
overgrown with white hairs, while the median band on the fore wings is nearly obsolete, being 
represented only by a triangular costal dark si)ot and a small round spot near the inner edge of 
the wing; in another specimen the band is very much contracted, only represented by a narrow 
line on the cubital vein. On comparing such specimens it is seen that C, cinerea may have 
originated from this species, and that it is a more recent form than scoloiwndrina. 
Larva . — Although the species is so widely diffused, its larva has not been detected exce])t by 
Mr. Thaxter in Maine, who says that it feeds on Populus, but gives no description of it. 
I copy, however, Dr. Dyar’s description of the egg and different larval stages of what he thinks 
is this species. 
The larva of Ceruva avolopcndnna has not been described, but I believe, that I have observed it.' No moths ■wero- 
bred from the larva? here described; but several considerations render it probable that they arc C. acolopemlrina, so- 
that I venture to present my notes under the name. 
(1) C. 8colopeu(h'ina is connnon throughout California and was taken hy mo in the Vosemito Valley. 
(2) These larva? have not boon described before, and could only bo C. paradoxa ' of the known Califoniiuii forms. 
(3) I am informed by Dr. Thaxter, wlio has bred it, that the larva of C. aqwUonaris {—acolopendrina) is much 
like that of C. dnereaf and tliose hero described recall cinerea in the undulating outline of the dorsal ])atcb. 
(1) Dr. Belir writes in answer to an inquiry: [In the larva of] Cei'ura acolopendrina the dorsal band . 
is three times widened, or I would call it twice constricted, but the degree of the constriction is rather variable, so- 
that sometimes, although rarely, the hand is almost interrupted.^’ 
Ktjg. — Slightly more than hemisi»herical, the base llatteued, smooth, suhlustrous black, under a lens appearing 
minutely punctured. Diameter, 1 mm. Under a half-inch objective it i.s^seen to be covered with Hat, irregularly 
hexagonal and elongated reticulations which become very small at the microi^yle. Between them the surface seems- 
smooth with a few extremely minute punctures. 
Firat larvfll ahige. — Head round, slightly shining, dark red-brown, almost black ; clypeus and month parts paler, 
ocelli black; a few. short hairs; width, 0.5 mm. Body smooth, of even width; a pair of si)inose suhdorsal processes 
on joint 2; the anal feet modilied into spiuoso stemapods, 3 mm. long; cervical shield small, very dark. Color of 
body blackish red-brown, feet and venter whitish; two greenish dorsal patches, one on joints 3-5, the other on joints 
8-10; elliptical, diftuso at their ends; a third patch appears later, on joint 12. On the body .ore a number of minute 
setjc. Tails twice annnlated with yellowish and tipped with white.. JCxtensile threads black, whitish at the base. 
The larva* cat only the p.aronchyma of the leaf during this stage. 
Second stage. — Head rounded, slightly narrowing to the vertex, its sutures deep; color, even red-brown, with a 
few minute yellow dots; >vidth, 0.8 mm. Joint 2 is swollen, its suhdorsal processes conical, thick, spiuose; low, 
rounded, small, setiferous tul)erolos on the body, apparently normal in arrangement; anal plate and stemapods^ 
spiuose. Body misty brown witli two elliptical, ditfuso, dorsal patches of yellowish green, the anterior one on 
joints 2-6, the posterior on joints 8-10; subvontral region and all the feet pale whitish. Tails red-hrowii at bavsal 
half, then blackish, with two sordid white annulations. Length, 3.8 mm. As the stage advances the anterior patch 
becomes larger, Join.s the subveiitral coloration, and is obscurely divided by a browui dorsal line, while the whole 
dorsal region, except joint 11, hecomes pale. 
Third stage. — Head higher than wide, roundly rectangular, llatteued in front; reddish brown, the upper two- 
thirds thickly covered with little roiiud yellowish spcits, hut leaving a narrow line of the ground color on each side 
of the central suture above the clypeus; anteuuie wliito; width, 1.15 mm. Body enlarged at joint 2, bearing a pair 
<tf heavily spined subdorsal processes; tails minutely spiued. The normal piliferous dots on the body consist of 
' There is good reason to believe that C, paradoxa, is only a very i>ale form of C. cinerea, the larva of which is- 
well known. 
