1908.] NATURAL SCIENCES OF PHILADELPHIA. 311 



the corresponding joints of the first legs being also a little longer; 

 anterior tibise armed beneath as usual; patella of leg I unarmed, that 

 of leg II with a spine in front; tarsi setose. 



Epigynum presenting two more or less divergent tubercles caudad, 

 upon the ventral face of which the spermatheca open; these tubercles, 

 at first angular, ma}^ become more rounded with age. (PL XXII, 

 fig. 4.) 



Total length, 6.5 mm. Length of cephalothorax, 3.1 nun.; width, 

 2.2 mm. 



Length of leg I, 9.2 mm. ; tib. + pat., 3.3 mm. ; met., 2.2 mm 



Length of leg II, 8.4 mm. 



Length of leg III, 7.7 mnL 



Length of leg IV, 11.6 mm. ; tib. + pat., 3.7 mm. ; met., 3.6 mm. 



Male. — Coloration nearly as in female except that the femora and 

 tibise are indistinctly annulate and the other joints clear yellow; the 

 palpi are brown of reddish tinge. 



For structure of palpus see PL XXII, fig. 3. 



Total length, 4.5 mm. Length of cephalothorax, 2.2 mm. 



Syn.— 1890. Plrata insularis, Marx, Proc. U. S. N. M., 12, p. 564. 

 1892. Pirata insularis, Banks, Proc. Acad. Nat. Sci. Phila., 41, p. 71. 

 1902. Pirata liber Montgomery, op. cil., p. 578, PL 30, figs. 42, 43. 

 1904. Pirata liber, ibid., p. 311. 



I'ype locality. — ^Loiig I^ake, Adirondack Mountains, New York. 



Known localities. — Rhode Island !, New York!, Pennsylvania!. 



This is a common species which is subject to considerable variation, 

 both in some of its structural characters and, more noticeably, in depth 

 of coloration. In some the annulations are very deep and distinct and 

 the body parts are correspondingly dark, while in others the annula- 

 tions may be very indistinct. 



Pirata febriculosa (Beck), 1881. 



(.\nn. Soc. Ent. Belg., 25, PI. 3, figs. 2, 2a.) 

 Female. — Sides of cephalothorax dark brown to blackish of usually 

 greenish tinge; a reddish yellow median band narrow caudally and 

 widening anteriorly to the eye region, where it expands and passes below 

 the eyes of each side and attains the clypeus; in front of dorsal furrow 

 a median black line which bifurcates sending a branch forward to inner 

 side of third eye of each side in the usual manner; on each side a 

 moderately wide yellow or reddish-yellow marginal band which 

 extends forward as far as the cervical furrow; clypeus yellow; eye 

 region black; along each lateral margin in life a distinct hne of white 



