182 REVISTA CHILENA. DE HISTORIA NATUEAL 
in the male. The epimerum of the metathorax has two rows 
of bristles, containing in the male four and in the female 
five bristles each. The episternura of the metathorax as 
well as the sternum bear each two strong bristles. 
Abdomen: — There are two rows of bristles on the ter- 
gites, the first and second tergites having some additio- 
nal bristles in front of the rows. In the male the first to 
fourth tergites have the bristles very much prolonged, 
these bristles forming a kind of mane. The seventh ter- 
gite has but one apical bristle in both sexes; this bristle 
is on one side of our only male broad, almost blade-like in 
side view. The sternites of the second segment has a ven- 
tral pair of bristles. On the sternites of the segmentsthree to 
seven of the male are three bristles on each side, the sterni- 
tes of segments three to six of the female bearing four 
bristles with two to four smaller ones in front; on the 
seventh segment of the female there are two rows of 
about seven bristles on each side. 
Legs: — The hind coxa is less broad than in the other 
American species of this genus. The hind femur bears 
two ventral and two or three lateral bristles posteriorly 
near the apex, there being no bristles further front ard 
on the sides. The tibiae and tarsi resemble those of S. 
Mars, Eothsch., the long bristles, however, are a little 
shorter than in that species. 
Modified segments:— Male. The main portion of the 
clasping organs is a large clasper which is rounded at 
the apex, and bears along the apical edge a regular row 
of very long bristles. The moveable process F cannot 
clearly be made out in our only male. Itis narrow, and bears 
a peculiar spine as shown in the figure. Above this « fin- 
ger » there is another process which is club-shaped. In 
which way this process is connected with the clasper or 
