MEMOIRS OF THE iSATlOXAL ACADEMY OF SCIENCES. 
255 
Underside uiiiforiuly ijale, body and both wings almost white, and in some examples crossed 
by a dusky line. 
Expanse of wings, S 48 mm., 9 43 mm.; length of body, 6 19 mm., 9 IS mm. 
In the straight costa, rather oblique outer edge, and lack of any definite markings, including 
a discal mark, this species, with its pale, faded look, differs from any others of the genus. 
Specimens of the extremes of variation in a brood reared by Professor Popenoe, and which 
he sent me, included both nnicolor and marina of my Synopsis. 
Ugff, — Diametei’, about 0.7 mm. Regularly hemispherical, though rather fiat, not being more 
than half as high as broad. Shell, when empty, thin, white, ornamented with dense, more or less 
regular, well-defined polygonal areas, the edges or mai'gins of which ai^e very finely beaded ; toward 
the apex they become more or less elongated and the micropyle at the apex is surrounded by a double 
rosette of elongated oval areas, the sharper end pointing inward, those of the inner row one-third 
to one half as largo as those forming the outer series. The larva in escaping eats, as usual, an 
irregular, kidney-shaped hole near the top. 
The eggs were received from Mr. Tallant of Columbus, Ohio, August 21, having been sent on 
the ISth, all hatching on the way. 
Larvcty Stage J. — Freshly hatched larva. Length, including the tails (stemapoda), G-7 mm. The 
head is almost as wide as the body, somewhat heart-shaped, bilobed, dark chestnut, paler along 
the middle. The body is long and slender, especially elongated behind the eighth abdominal 
segment. The prothoracic segment in all the examples is full, as if it were about to molt, though 
it seems too soon after hatching. The prothoracic segment bears two diverging, rather thick 
appendages, which are cylindrical and rounded at tip ; the segment at base and behind pale reddish 
and cherry-red above; the appendages are cherry-red at base, paler above, but toward the end 
on the distal two-thirds blackish. In front are two reddish parallel stripes. The body is pale 
beneath, above pale greenish yellow, the third and seventh .abdominal segments cherry-red, 
including the sides, low down, of the sixth segment. From the first thoracic to the end of the 
body are three parallel lateral, linear, reddish lines, the lowermost being obsolete posteriorly. ‘ 
The eighth abdominal segment is convex above, but not humped. The suranal lilate is small, 
narrow, hut distinct, rough on the surface and dark, almost blackish. Behind, at the base of the 
tails, are two piliferous warts; tlie tails themselves are as long as the three last segments (8-10) 
taken to together, and are of uniform thickness, ringed with dark red, densely, microscopically, 
spiniilose, with sparse fine hairs and with two or three hairs at the end. The legs each end in a 
cylindrical swollen flagellum, somewhat barrel shai>ed, with a deep red riug in the middle, the end 
being clear and transparent. All over the body the piliferous warts and hairs are minute. The- 
glandular setm are short, slender, widening at the square end, and not being regularly bulbous. 
It rests with the body curved around so that the head nearly touches the tails, the last three 
segments and tails being held up in the air, the latter being extended and then gracefully thrown 
into the air. 
Stage IL — Length, 0 mm. The anal legs are still longer than before, but the prothoracic 
Sicilies are much less than one-half shorter tlian before, while the back of the body is now 
reddish. (Popenoe). 
Dr. Dyar has contributed the following descriptions as the proofs are passing through my 
hands : 
Stage III . — “ Head whitish green, a broad diffuse brown band on each lobe to vertex; width,. 
1.35 mm. Cervical horns represented by two short black tubercles; tails 2 mm. long, faintly 
reddish, the crimson tixis a little swollen. Body green, with three to five faint white lines each 
side of the reddish brown dorsal band, which is distinct, covering cervical shield and anal plate, 
retracted at each suture and widening on joints 7 and 11. 
Stage IV . — Head about as high as wide, narrowing toward the vertex; width, 2.2 mm., 
.marked as before, the inner white border of the brown baud very broad, covmriug a large part of 
the face. Cervical horns reduced to mere points. Dorsal baud as before, but of nearly uniform 
width, though widened on joint 11. The band is mottled with and bordered by white, becoming 
yellow in the segmental sutures. There is a trace of a yellow stigmatal line, and the sides have a. 
few black specks toward the extremities.^^ 
