258 M^MOIKS OF TUB XATIONAL ACADEMY OF SCIENCES. 



thus colored, while the rest of the thorax is darker cinereous, the alidomeu being a little paler. 

 Tlie larger part of the fore wings is of a pale whitisli ashen, eoneolorons witli the liead and 

 protliorax. Nearly the basal third is of a darker cinereous (usually almost black) than the hinder 

 part of the thorax, and this portion embraces three unequal black linear streaks, one extending 

 ahnig tlie 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 asheu line which 

 begins on the basal third of the costa and runs obliquely inward; it is twice zigzag before Ihe 

 subcostal, is bent more obtusely outward in the discal space, and again bends slowly outward, 

 and turns at a right angle to meet the dark streiik 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 without with black. Beyond this spot are tliree 

 minute dark spots, the inner of wliich is succeeded by a series of four large pale luuules margined 

 ou either side with cinereous, which end on the third median, being in the third interspace replaced 

 by a square conspicuous black spot, whose upper side is continued a little outward, while on the 

 opposite lower side is a supplementary linear dot in tlie next interspace. This spot is continuous 

 with a submarginal oblique subapical zigzag pale line, dusky Mithin and bearing within three 

 dark streaks in the middle of each interspace. Beyond this line the margin is dusky cinereous, 

 with a marginal series of black linear luuules interrupted by the venules. Fringe ashen, with 

 long black streaks, rather than dots, on the ends of tlie venules. 



Ilind wings but little paler thau the abdomen, with a ratlier distinct pale band on the outer 

 third, which is curved suddenly outward in the middle. Base of fringe dark, as are the venules 

 and outer margin of the wings. The only mark on them is a single oblicpie costal streak a little 

 beyond the middle of the wing. 



Expanse of wings, $ 45 mm., 9 .5.5 mm. ; length of body, $ 20 mm., 5 22 mm. 



This fine species is rather above the medium size, and may be recognized by the pale, almost 

 white, fore wings, whose basal third is blackish; also by the obscure linear curved discal mark, 

 and more especially by the sciuarisli black spot near the internal angle, which is isolated from the 

 submargino-apical dusky line, of which it forms a imrt. 



The hind wings are crossed on the outer third by a diffuse whitish sinuous line not present 

 in II. (istarte or obliqua. 



The species is also notable from the six dusky dorsal tufts along the abdomen of both sexes. 

 It is liable at first sight to be confounded with H. pulcerea^ but differs in the clearer, less spotted 

 middle portion of the fore wings. 



The foregoing description applies to those examples, five or six, which I have bred at Provi- 

 dence. In a female expanding 00 mm., received from Mr. Hulst (PI. V, fig. 21), and presumably 

 collected in New York or New Jersey, the fore wings 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 have reared or seen, and 

 forms the outer edge of the blackish basal third of the wing. Beyond this line the wing is almost 

 white, with a very faint yellowish brown shade toward the apex. Extradiscal line composed of 

 three parallel scalloped lines, and in the second or third inedian space is a distinct black irregular 

 lunule; a scalloped subapical black line. 



Hind wings uniformly mouse colored, with a distinct whitish diffuse line, whicli enables one 

 to readily separate this species from H. astarte or ohliqua. 



The form figured by Cramer is probably the present species; it is like a large 9 (Fig- 21) in my 

 collection. Cramer's figure is very poor and is a rude representation of this variety. My specimen 

 is exactly like Grote and Iiobinson's type, which is in the American Museum of Natural Uistory, 

 with which I have compared it. The same specimen also agrees with their colored figure. My 

 example is a 2 expanding 45 mm. It differs from those described above in having a wide, curved, 

 black shade arising from inside of the discal mark and nearly swamping it; it then curves around 

 backward and outward, filling the second cubital space and inclosing two black curved streaks 

 or lines, while the lunule in the first cubital space is large and distinct, and the scalloped 

 subapical black shade beginning ou the first cubital venule is broad and distinct, this shade 

 being distinct in the types of my original descrijitiou of iessella. In this variety the fore wings. 



