258 
MEMOIKS OF THE I^ATIOi^AL ACADEMY OF SCIENCES. 
thus colored, while the rest of the thorax is darker cinereous, the abdomen being a little paler^ 
The larger part of the fore wings is of a pale whitish ashen, concolorous witli the head and 
prothorax. Nearly the basal third is of a darker ciiiereous (usually almost black) than the hinder 
part of the thorax, and this portion embraces three unequal black linear streaks, one extending 
along the subcostal, the middle one the largest and following the cubital, while the shorter one 
runs along the internal nervure. This region is bounded externally by a pale ashen lino which 
begins on the basal third of the costa and runs obliquely inward; it is twice zigzag before the 
subcostal, is bent more obtusely outward in the discal space, and again bejids slowly outward, 
and turns at a right angle to meet the dai*k streak on the internal vein, and usually crosses the 
wing, ending in the middle of the internal edge. The discal mark is a faint curved black line, 
succeeded by a rather oblique, very obscure cinereous lunated line. Upon the costa just beyond 
is a white spot, once zigzag on the costa, edged Avithont Avith black. Beyond this spot are three 
minute dark spots, the inner of which is succeeded by a series of four large pale lunules margined 
on either side AAuth cinereous, which end on the third median, being in the third interspace replaced 
by a squat’o conspicuous black spot, whose upper side is continued a little outward, while on the 
opposite lower side is a supplementary linear dot in the next interspace. This spot is continuous 
with a subinai'ginal oblique subapical zigzag pale line, dusky within and bearing within three 
dark streaks in the middle of each interspace. Beyond this line the margin is duskj’ cinereous, 
Avith a marginal series of black linear lunules interrupted by the Annies. Fringe ashen, with 
long black streaks, rather than dots, on the ends of the venules. 
Hind Aviugs but little paler than the abdomen, AA'ith a rather distinct ])ale band on the outer 
third, which is curved suddenly outward in the middle. Base of Mnge dark, as are the venules, 
and outer margin of the wings. The only mark on them is a single oblique costal streak a little 
beyond the middle of the wing. 
Expanse of AAungs, S 45 mm., $ 55 mm.; length of body, 5 20 mm., $ 22 mm. 
This fine species is rather above the medium size, and may be recognized by the pale, almost, 
white, fore Avings, whose basal third is blackish; also by the obscure linear curA^ed discal mark, 
and more especially by the squarish black spot near the internal angle, which is isolated from the 
submarginO’apical dusky line, of which it forms a part. 
The hind Avings are crossed on the outer third by a diffuse AAdiitish sinuous line not present, 
in H, astarte or ohliqiia. 
The sioecies is also notable from the six dusky dorsal tufts along the abdomen of both sexes. . 
It is liable at first sight to be confounded Avith II, pulvereciy but differs in the clearer, less spotted 
middle portion of the fore wings. 
The foregoing descrijdion applies to those examples, five or six, which I have bred at Provi- 
dence. In a female expanding GO mm., received from Mr. Hulst (PI. Y, fig. 21), and presumably 
collected in New York or Ncav Jersey, the fore Avings are fully as light, but the double zigzag line 
on the basal third of the wing is much more distinct than in the males I liaA^e reared or seen, and 
forms the outer edge of the blackish basal third of the Aving. Beyond this line the wing is almost 
Avhite, Avith a very faint yellowish brown shade toAAmrd the apex. Extradiscal line composed of‘ 
three parallel scalloped lines, and in the second or third median space is a distinct black irregular 
lunule; a scalloped subapical black line. 
Hind Avings uniformly mouse-colored, with a distinct whitish diffuse line, which enables one- 
to readily separate this species from H. astarte or ohliqna. 
The form figured by Cramer is probably the present species ; it is like a large $ (Fig. 21) in my 
collection. Cramer’s figure is very jmor and is a rude representation of this variety. My specimen 
is exactly like Grote and Ilobinson’s type, which is in the Amex’ican Museum of Natural History, 
AAuth Avhich I have compared it. The same specimen also agrees Avith their colored figure. My 
example is a ? expanding 45 mm. It differs from those described above in ha\dug a wide, curA^ed, 
black shade arising from inside of the discal mark and neai'ly swanq>iiig it; it then curves around 
backAvard and outward, filling the second cubital space and inclosing two black cinwed streaks 
or lines, AAdiile the lunule in the first cubital space is large O/ud distinct, and the scalloped 
subapical black shade beginning on the first cubital venule is broad and distinct, this shade 
being distinct in the types of my original description of tessella. In this variety the fore Avings. 
