120 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



blackish shading, but is traceable iu some specimens, and is then 

 found to extend obli(|ucly from tlie costa through the i^eniform, then 

 bent inward to form the outer margin of theblackisli shade as far as it 

 extends. It is evident in the form of a lunule on the internal margin. 

 The transverse posterior line is geminate, the inner line even, powdery, 

 and contiiuious; the outer line lunulate, dentate on the veins, and 

 emphasized by the included pale shading. The line is interrupted by 

 the longitudinal shade. There is a pale, irregular, more or less ill- 

 defined subtermiual line, which is interrupted opposite the cell and 

 above the anal angle. Tlie terminal space is marked with blackish 

 between the veins. Tliere is a series of black terminal lunules, beyond 

 which the interlined fringes are cut with smoky. The ordinary spots 

 are traceable; the orbicular round, of the pale ground color, ringed by 

 blackish scales and centered by blackish; the reniform large, kidney- 

 shaped, but obscured by the transverse shading. At the base of the 

 wings there is, interiorly, a contrasting yellow patch, on which is massed 

 a tuft of long scales which give the wing a very characteristic appear- 

 ance. Secondaries smoky in both sexes; in the males a little paler. 

 Beneath, very pale yellowish, powdery, both wings with a very distinct 

 discal <l()t and outer line. 



Expanse, 1.00 to l.SO inches (40 to 45 mm.). 



Habitat. — Canada, southward to Washington, District of Columbia, 

 west to the Mississippi and Central States; Canada and New York, 

 June and July. 



This is a very strongly marked species which can not be easily mis- 

 taken for anything else. It is a large form and broader winged than usual, 

 the primaries being more nearly triangular than in those immediately 

 associated witli it. Tlie peculiar nuirkings give it a blotchy appear- 

 ance. A broad streak running from the base to the outer margin, 

 joined by a broad baud from the middle of the costa, gives us a pale 

 space at the base, another one toward the tip, and a narrow pale line 

 along the iuuer margin, all of these spaces, however, being broken by 

 blackish. Finally, the peculiar ])atch of yellow scales at the inferior 

 base of the wing is (juite characteristic. The fore legs of the male are 

 unusually long and slender; the femur a little dilated just before the 

 middle, the tibia with a very large epiphysis inserted rather close to 

 the base. The harpes of the male are very long, narrow, nearly equal, 

 and round at the tip. The clasper is very well developed, unusually 

 rolled together, the finger-like process from the upper angle very long 

 and not much curved, the process from the upi)er margin toward base 

 short and rather stout. The species seems to be not at all uncommon. 

 The front is bulging and a little iutiated. The palpi rather short and 

 scarcely reaching to its middle. 



