92 BULLETIN 48, UNITED STATES NATIONAL MUSEUM. 



bristly lashes. Antenna^ bristlelike, in the male with short, even cilife. 

 Thorax woolly, densely clothed, rather more convex and stouter than 

 in its allies. Abdomen closely scaled, with hairy dorsal tuftings. 

 Breast and femora with dense, long, woolly clothing. Tibia* closely 

 hairy or scaly. 



With the above characterization oar species agree fairly well, save 

 that there is a very great variation in the degree of the "lashing" of 

 the eyes, this being never prominent, and usually practically wanting. 

 The primaries are large and broad, proportionate to the secondaries, 

 which are not usually developed, and this character is really all that 

 separates the genus from Hypena. In all the other essential characters 

 the genus agrees with Hypena, including therein the absence of sexual 

 modifications in the male, except the somewhat more robust body, 

 more woolly clothing, more evident dorsal tufts, and somewhat shorter 

 and more oblique palpi. The palpi vary in length quite consider- 

 ably, but are not excessively long in any instance; longest in the 

 largest and smallest of the species, which are most aberrant from the 

 others referred to here. 



A very distinct sexual difference which has not been heretofore 

 a])preciated is that the males are larger, darker, and decidedly more 

 robust or woolly than the females. This feature unites species that 

 have been heretofore considered as undcmbtediy distinct l)v all students, 

 including myself, and I desire to credit Mr. Butler witli the suggestion 

 thatlirst induced me to examine the specimens as to sex and the rela- 

 tion of the so-called species to each other. The venation is normal in 

 both wings. The primaries are trigonate; the costa a little sinuate, 

 depressed centrally; the a]>ex a little produced; outer margin quite 

 strongly outcurved, only moderately obliijue, a little excavated below 

 the apex; fringes sometimes feebly scalloped. 



We have in our fauna two quite distinct series. 



In the first the median lines are irregular, particularly the trans- 

 verse posterior, and the median space is decidedly darker, contrasting 

 as against the pale, often whitish, subterminal si)ace. 



In the second the transverse posterior line is much more even, at most 

 a little angulated, and there is no sharp contrast between the spaces. 

 These features are not to be too strictly construed, for there is quite a 

 difference in shading, not only between specimens of the same sex but 

 yet more bet^veen the sexes. However, by contrasting 7>. Jxilfimoralis, 

 of the first series, with female B. <(eh((tin((1is,ot' the second, the differ- 

 ence attempted to be indicated will be readily appreciated. 



At the head of the first series 1 place 7>. nutiiaUs, in which neither 

 transverse anterior nor transverse jK^sterior line reach the hind nnirgin, 

 but unite so as to inclose a rhomboidal dark-brown median space, all the 

 rest of the wing being decidedly paler. 



Following tliis come two species in which tlic transverse anterior 

 line apparently does not reach the costa, but starts from the base on 



