50 
MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 
pair, and one-third shorter than fourth pair; the latter pair 8 mm in length, being of the same 
length as the second pair, but with the basal joint longer, the last tarsal joint being subdivided 
into but three joints. The penis is 1.25““ in length, the basal portion not curved, the smaller distal 
portion a little shorter than the basal, and ending in a corneous short cultriform thin appendage 
with four subacute teeth on the outer edge. 
Leugth of body, not including the chelicerra, 3 mm •, breadth, 2 ram . 
Subvariety Weyerensis. Those from Weyer’s Cave, Virginia, all differ in habit from the 
Wyandotte forms, and are easily distinguishable, as seen in male and female specimens from 
Weyer’s Cave. They are larger and darker, with brown specks, as seen in Plate XII, fig__ The 
second pair of legs, as compared with those from the Wyandotte Cave, are shorter and thicker. 
The penis, however, is a little longer, being 1.5““ in length, rather slenderer, and the cultriform 
appendage differs a little in shape, while the basal half is much more curved at base. It should 
be borne in mind that these differences are such as we would expect to meet with m individuals 
from a smaller cave and one more liable to be reached from the outside world; and the differences, 
moreover, are such as ally this variety to the more robust and out of door forms. 
- One specimen from a cave near Dismal Creek (collected by Messrs. Sanborn and Beckham) 
was like Wyandotte specimens in size, and smaller than the var. weyerensis, but resembled the 
latter in color. 
Variety 2, caecum, (PI. XII) 10 males and females from the Carter Caves (Bat Cave) are 
blind, the cornea being present, but with no retina. In all the specimens the cornea is 
equally colorless, and the individuals must be practically blind. The eye-tubercle is smaller and 
blunter than in Wyandotte examples. The individuals area little smaller and paler than the 
variety weyerensis-, the pedipalps are the same, except that there appear to be two spines on the 
inside ot the second joint instead of one, as iu weyerensis and the typical forms from Wyandotte 
Cave; the length and size of the second leg are identical with those of the typical Wyandotte 
examples, being slenderer and slightly longer than var. weyerensis, but the third joint is setose- 
that ot the Wyandotte specimens, at least in some cases, being without set®. The penis in ceecum 
is at slightly over l mm in leugth; it is shorter and smaller than in the Wyandotte and Weyer 
specimens, the basal joint shorter as well as the second joint, and the teeth on the cultriform 
appendage are shorter and blunter. 
Remarks. While, as observed above, the Weyer’s Cave specimens are a pretty well marked 
variety, and are more like out-of-door forms than the Wyandotte Cave examples, and this would 
be what we should expect to find iu inhabitants of a larger and much deeper cave, it is singular 
to find that the individuals of var. ocecurn from Bat Cave, which is a smaller cave and apparently- 
more open to daylight than Weyer’s Cave, should be a more attenuated and blind form We 
should naturally expect that the Wyandotte individuals would be blind. 
1844. 
Phalangodes armata (Tellkampf). Plate XIII, figs. 1, la-lh. 
~ Phalangodes armata Tellkampf, Archiv fur Naturgeschichte, X Jalirg., Bd. 1, 1120, Taf. viii fio- 8 7 to ’0 
Acanlhoclieir armata Lucas, Ann. Soc. Ent. Prance. 1860. 
Wood, Proc. Essex Institute, 36. 1868. 
Phrixis longipes Cope, Amer. Naturalist, vi, 421, July. 1872. 
Phalangodes armata Simon, Arachnides de France, vii, 156. 1879. 
Phrixis longipes Hubbard, Amer. Ent., iii, 39. Feb. 1880. 
Male and female. Body rather narrow and long compared with P.flavescens, being considerably 
onger than broad; whitish straw-yellow, including the body and appendages, the young being 
white. Cephalothorax considerably longer than broad; the sides widen somewhat towards the 
hinder edge; they are not constricted near the middle; the surface is moderately convex, and the 
posterior edge is nearly straight and free from the abdomen, which is broad and short, but longer 
and more pointed than in P.flavescens, with five segments to be seen from above and six beneath 
the latter being the number of uromeres in the genus Phalangodes; the last segment (seen from 
above is less than half as wide as the last one in P. flavescens, and is narrow and conical in shape. 
le eye tubercle is about half the size of that of P.flavescens, and is conical in shape; there 
are no traces of the eyes, either of a cornea or dark pigment mass. 
