eae | PROCEEDINGS OF THE NATIONAL MUSEUM. 35 
The abdominal tufts are larger, more dense and more prominent than 
in any other of the species, and are of a rich brown with a carmine 
admixture. 
The balance of the species offer no unique characters, and are separ- 
able into two series, containing quite closely related species. In the 
first of these series the t. p. line is marked in the submedian interspace 
by a lunate pale line, preceded and followed by a dusky or black line 
or shade. In the second series the t. p. line is black or dusky, single, 
toothed in the submedian interspace, and without the pale lunule. In 
none of our species is it at all questionable to which series it is referable. 
The first series contains six species, all with the same type of maca- 
lation, and closely related. The sexual characters are practically alike, 
and offer little aid in separating species. The harpes are long, quite 
narrow beyond the middle, somewhat widening to the oblique tip, which 
is acute at the superior angle, and inwardly fringed with spinules. 
The clasper is single, stout, short, arising from a broad corneous base, 
extending obliquely outward and upward, and rarely exceeding the lat- 
eral margin of the harpe. The exceptions to this type are exceptional 
in other characters, and are aberrant as members of this genus. 
Three of the species are western—Colorado and Montana—and as a 
whole they differ from the three corresponding eastern species by the 
usually more distinct maculation, and by a peculiar roughness in vesti- 
ture, the eastern forms being quite smooth and even. There is a ten- 
dency in all the species to a dotted maculation of the ordinary spots, 
two round dots in the orbicular and four in the reniform being normal. 
Montane is the best marked of all the species. It is gray in color, 
the basal space yellow, a deeper shade extending through the cell and 
beyond it to the outer margin. In the median space the costal region 
is very dark gray. Beyond the lunule the submedian interspace is 
also yellow brown, with a darker, sometimes blackish, curved streak. 
The ordinary spots are large, well defined, paler in color, with the brown 
dots usually distinct. The secondaries are white at base, with a well- 
defined outer dark band, broader in the female. 
Similaris has exactly the same maculation as montane, but lacks 
al] the yellow shadings. The costal region is darker gray, and there 
is a blackish shade along the internal margin. Beyond the lunule in 
submedian interspace there is a distinctly defined curved black streak. 
The ordinary spots are very distinct and the defining iines are broken 
into dots, much as in the European absynthii. The secondaries are 
whitish at base, darkening outwardly to blackish, without having a 
defined band, as in montane. I consider the species a fairly distinct 
one, and have both sexes. 
Obscurior is another species of the same series; but it is very dark 
gray, even in color, with the markings ill defined. The ordinary spots 
are as inthe preceding ; but not at all distinct. The secondaries are 
fuscous, slightly paler only, toward base. I have females only. 
