ON TRACT! E AN ARACIIN IDA- 
527 
of the posterior feet ; these stigmata are concealed by the 
haunches. 
The feet, eight in number, are very long, very slender, 
cylindrical, composed of the haunch, of the thigh, of the leg 
formed of two articulations, and of the tarsus, whose length at 
least equals that of the leg and thigh taken together, and 
which is composed of a great number of articulations, the first 
of which is very long, and the last provided with a small hook, 
which appears simple, and arched. 
The naturalists who have treated of the phalangia, with the 
exception of Lister and the younger Hermann, whose obser- 
vations, however, were not published until after those of M. 
Latreille, were not acquainted with the sexual organs of these 
insects. These organs have a singular form, especially those 
of the males, and in the two sexes their position is curious : 
the male organ is a sort of elongated dart, composed of two 
pieces, the first of which, forming the base, is short, thick, and 
of a soft consistence ; it serves as a case to the second, which 
is a little longer, more narrow, almost scaly, terminated in 
Ph. cornutum by a triangular membranaceous piece, hooked 
at the internal side, with a small setaceous point, black, and 
arched, which proceeds from the superior angle of this piece. 
In a state of inaction, this part is concealed in a sheath, situ- 
ated immediately under the mouth. The sexual part of the 
female is placed similarly to that of the male. We discover 
there a membranaceous tube, compressed, and very flexible, 
which serves as an oviduct. By pressing a small eminence 
called lip , which is found between the last two pairs of feet, at 
the base of the abdomen, these parts may be made to protrude 
in both sexes. 
These arachnida do notspin, as some authors have pretended. 
Many species have a strong odour of the walnut-tree, and all 
are carnivorous. They feed on little insects, which they seize 
