MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 
51 
Chelicerae slenderer than in P. flavescens, the fingers rather longer; the movable finger with 
about twelve teeth on the inner edge, the thumb with six obtuse teeth. Pedipalps slender; the 
coxa and basal joints much as in P. flavescens, but the spine on the inner side of the first joint 
twice as long; second joint (female) scarcely thicker than the first, inner edge not so serrulate as 
in P. flavescens, the two large spines twice as long as the joint is thick; the third joint a little 
more than half as long as the second, with two long spines on one side and two unequal much 
smaller ones on the other; fourth joint but slightly longer than the fifth, with two large long . 
spines on each side; fifth and last joint not so thick as the fourth, only two long spines on each 
side, the terminal spine two thirds as long as the joint itself. 
All the legs remarkably long and slender, eight-jointed; the tarsus five-jointed. 
First pair the shortest, not quite so long as third pair; second pair about one-third longer 
than the first, with remarkably attenuated tarsi, with a single weak claw; length, 18 mm ; third 
pair with the coxal joint larger than in any of the other pairs (first and second, and even the 
fourth), and considerably shorter than the fourth; fourth pair of legs very long, but considerably 
shorter than the second pair, with six tarsal joints, the last somewhat swollen, considerably longer 
than the penultimate joint, and bearing two rather large, long, slender claws, and three long, large 
set®. 
The ovipositor* is a very large organ, being 1.5 mm in length, or more than a third as long as 
the body, and is as thick as the chelieerse or the third pair of cox*; it projects forward when fully 
protruded (at least in alcoholic specimens); it is not chitinous, is muscular, not jointed, is slightly 
curved, and ends abruptly, with (as seen in profile, Fig. —) about six fine setse on each side, those 
on the extreme side being nearest together; these are probably tactile hairs (the eggs are prob¬ 
ably laid in crevices). 
The penis differs remarkably from that of P. flavescens ; it is rather thick when extended, and 
slightly over l mtn in length, or about one-third as long as the body; the"basal segment is not much 
longer than broad, the second is over three times as long as the basal segment, of uniform width, 
and divides at the end into two lateral slightly-curved points, and a longer, straight, acute pro¬ 
jection ; the sides are setose, especially towards the end, including the lateral horns. 
Length of body, 3 to 4 mm ; breadth, 2 to 2.5 mm ; of chelieerse, 2 mm ; of pedipalps, 5 mm . Labyrinth 
and Dead Sea, Mammoth Cave (Packard); Dixon’s Gave (Packard); Martha’s Vineyard, Mammoth 
Gave (Hubbard); W hite’s Gave, several (Packard); Diamond Gave, Kentucky (Packard). 
Tellkampfs figure was“ crude and imperfect, as the second pair of legs were wanting in his 
specimens, which were evidently young, while the tarsal joints of the remaining limbs were not 
correctly drawn; hence his description was incorrect as regards the limbs, as he says the length 
of the limbs differs little. Professor Gope, having specimens of this species with all the legs 
present, and basing his comparison with Tellkampf’s genus on the latter’s figure, copied by us in 
the American Naturalist, founded his genus Phrixis on the character of the “ multiartieulate tarsi,” 
although he says the tarsi of the ‘‘longest legs” were “not counted.” His specimens were mature. 
Mr. H. G. Hubbard gives an excellent figure of the female, which he incorrectly considers to be a 
male. 
The following note on this species is copied from Mr. Hubbard’s paper. 
Phrixis longipes Cope (Fig. 2).—In Professor Cope’s description of this species ( l. c. vi., 421) some confusion occurs 
as to the tarsi. In the longest legs the number of joints was not counted, although they are mentioned as “multi- 
articulate,” and this, with the absence of eyes, is made to characterize the genus. 
In the specimens before me the anterior and shortest pair of legs have five-jointed tarsi, ending in a single 
claw, without an opposing bristle, as given by Cope; the second and longest pair have nine tarsal joints, with a 
single claw; the third and fourth pairs are intermediate in length between the first and second, they have each six- 
jointed tarsi and a pair of claws. The first tarsal joints in all the legs equals or exceeds the femora and tibiae; the 
second joint, though shorter than the first, is very long. The palpi (that of the left side is omitted in the figure) 
have five joints and a terminal spine; the basal joint bears a single spine; the second joint has five, three below the 
middle, springing from the outer edge, two above, springing from the inner edge; the third joint has one on the 
outer and two on the inner edges; the fourth joint has two external and three internal; and the fifth, two spines on 
* This organ was mistaken by Mr. Hubbard in his description for the penis and figured as such. Amer. Ent., 
iii, 79, 
