[219J ON OUCULLIA INTERMEDIA AND 0. LUCIFUGA. g7 



reniform mark and runs along without quite reaching the margin ; a 

 shorter ray resting on the margin in cell no. 3 ; and, lastly, the short 

 and usually strong and somewhat oblique ray, with a whitish border, in 

 cell 1 b, near the interior angle have the forms and positions as with 

 lutifuga.) but the markings are mostly fainter; in some specimens 

 quite indistinct, but are never wanting. A row of black lines or lu 

 nettes, which, with the female, form nearly an unbroken line, are placed 

 on the extreme terminal margin as with lucifuga, and the gray fringes, 

 divided in the middle by a light line, are identical in both species. 

 The orbicular spot is totally wanting ; the outer border of the reni 

 form spot is more or less completely marked by dark lines ; most con 

 stantly its lower portion, next in frequency the outer, and lastly the 

 upper border. These marks are not discernible in the male. On the 

 discal cross-vein is, in some cases, an indistinct dark spot. The black 

 ish-gray secondaries become lighter toward the base. With the male, 

 the secondaries are always lighter colored, as is the case with all of 

 this genus; in the female they are sometimes uniform black-gray. 

 The white fringes are divided by a hair-like dark line, which latter is 

 in some cases so obscure and imperfect that they seem totally white. 

 Under side of the primaries ashy-gray, bordered along the anterior and 

 interior margins with whitish-gray. The secondaries of the female 

 whitish-gray, with a more or less broad hinder margin of a darker 

 gray ; in the male, almost completely dull white, with dark veins. On 

 the discal cross-vein is a distinct, rounded, dark reniform mark, which 

 is often connected with the base of the wing by a streak of the same 

 color. 



Color and markings of the remaining parts of the body are precisely 

 as in lucifuga, with the exception that intermedia is more bluish-gray 

 on the thorax, corresponding to the color of the wings. The center, 

 between the shoulder covers of intermedia, is also darker, blackish- 

 gray ; on the abdomen are four distinct dark, downy tufts, as is the 

 case with all its allies. The female is remarkable for the pointedness 

 of its abdomen. The downy hair which adorns this part, is on the 

 sides and on the underside of the last segment, in a greater or less 

 degree, of a rust-yellow color. The most distinctly marked females have, 

 on each side of the segment, a rust-yellow spot, the base of which is 

 formed by the last incisure ; and on the flat tuft, which covers the 

 sexual organ from beneath, is a transverse spot of the same color. 

 When I first noticed this singularity of coloring. I supposed it to be a 

 peculiarity exclusively characteristic of intermedia, as I did not observe 

 it in any others of the genus, and has, as far as I know, never been men 

 tioned in any description. It proved, however, to be the same with 

 lucifuga, and, furthermore, that this marking is not constant. Four 



