54 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Phlegmacera* cavicolens Pack. Plate XIV, figs. 5, oa-5g. 



Phlegmacera cavicolens Pack., Amer. Naturalist, xviii, 203, Feb., 1884. 



Generic characters. — la this geuus the body is not spiny, and is slightly compressed, much 

 less flattened than usual, no broader than high, and the tergal as well as ventral surface is unusually 

 convex and rounded. The cephalic plate bearing the eyes is about half as long as broad; behind 

 the cephalic plate are two very short thoracic segments, both together not so long as the cephalic 

 plate. The abdomen forms two-thirds of the length of the body. There are nine well-marked 

 abdominal segments seen from above, and six short well-marked urosternites, besides the basal 

 triangular urosternite. The chelicerse are three -join ted, and the hands are bent inward somewhat 

 as in Xemastoma. Pedipalps six-jointed, considerably longer than the body, the joints simple, not 

 spiny; the fifth joint longer than the others, much swollen; the sixth oval, simple, not spiny. 

 Second pair of legs (probably) ending in multiarticialate whiplash-like tarsi. One pair of legs, 

 either first or third, with undivided tarsi. 



This genus does not approach very near any of the European genera, such as Liobunum, 

 Megabunus, Oligolophus, Acantholophus, etc. It approaches Prosalpia most in the form of the 

 body, especially in the relations of the cephalic plate to the abdomen and the size of the ckelicerae; 

 but differs in the pedipalps being simple, while the first and third pair of legs are probably quite 

 different in the undivided tarsal joint. It appears to belong to Simon's subfamily Phalangiinae, 

 but has no very close affini ties to any of the European genera. 



Specific characters. — Body dark brown; appendages of a pale horn color; cephalic plate 

 between one-third and one-half as long 1 as broad. Eyes large, prominent, contiguous, scarcely 

 situated on an eminence; they are black and well developed. The abdominal segments above with 

 numerous scattered dark granulations, which become larger dorsally ; a series of large, short, but 

 broad, dorsal transverse blackish discolorations ; a broad, dusky, lateral, diffuse band low down on 

 the sides of the tergal sclerites next to the upper edge of the urosternites. Chelicerse pale horn 

 color, black at the tips of the fingers. Second joint moderately long, equal to the hand of the 

 third joint in length; manus rather thick, oval in outline; the outer surface with numerous fine 

 setae ; the fingers very unequal, the outer or movable one about two-thirds as long as the manus, 

 a good deal curved, with a single tooth near the end, and a series of about twenty three or twenty- 

 four separate, stiff, straight, even setae, corresponding to the serrula in Phalangodes ; inner finger 

 (thumb) straight, not much over half as long as the other finger, with two or three teeth near the 

 tip, and along the inner edge a sinuous series of small setae of unequal length, which ends at the 

 innermost tooth. The pedipalps are from one-fourth to one-third longer than the body ; the first 

 joint is as thick as long; second twice as long as thick; third twice as long as second and not so 

 thick; fourth not so long as third but considerably thicker; fifth longer than any of the other 

 joints and much swollen, oval in form ; sixth no longer than fifth is wide, and obtuse at the tip, 

 contracted at the base ; all beyond the basal joints densely and finely setose. 



Of the legs, which were unfortunately detached from the specimen, two were observed ; what 

 were perhaps the first pair are five-jointed, the basal joint minute, the second and fourth of equal 

 length, the third not being much longer than second is thick at base, while the tarsus is long and 

 slender, tapering to the minute claw ; second leg (?) very long, first joint very small and short, 

 second shorter than fourth, the third between one-third and one half as long as the second, the 

 fourth, with joint five, divided at the end into nine minute joints, and the last joint (joint six) sub- 

 divided into twelve joints, the last being equal in length to the four preceding, and bearing a single 

 minute claw. Length of body, 4 mm ; thickness, 2.5 mm ; width, 2 mm . Bat Cave, Carter county, 

 Kentucky. (Packard.) Two specimens. 



Family NEMASTOMATID^}. 

 Nemastoma troglodytes Pack. Plate XI Y, figs. 3, 3a, 3b, 3b'. 



Nemastoma troglodytes Pack., Bull. Hayden U. S. Geol. Surv. Terr., iii, 160, 1877. 



Ten females. Body rather long and slender compared with the European N. dentipalpis Koch, 

 the latter being short aud ovate, while our species is contracted at the base of the abdomen. The 

 eye-tubercle is rather large and prominent; the eyes themselves well developed, black in recently- 



* Nov. genus; QteyncuoZ, inflated; KepaS, horn or feeler. 



