1908-] NATURAL SCIENCES OF PHILADELPHIA. 209 



presents lateral plates along transverse arms in front and externally ; 

 the ends of arms extending into excavations in side walls. (PI. XV, 

 fig. 5.) 



Total length, 6.5 mm. Length of cephalothorax, 3 mm.; width, 

 2 mm. 



Length of leg I, 9.2 nmi. ; tib. + pat., 3.1 nnn. ; met., 2 mm. 



Length of leg TI, 8.7 mm. 



Length of leg III, 8.6 mm. 



Length of leg IV, 12.2 mm. ; tib. + pat., 4 mm. ; met., 3.7 mm. 



Male. — Color of cephalothorax and abdomen as in female. Mandibles 

 blackish with dusky brownish-yellow streaks. Labium and endites 

 also blackish. The female joint of the palpi is brownish yellow with 

 black spots and streaks especially toward the base; patella joint yellow- 

 ish brown, the tibia? black on sides and pale brownish above, covered 

 with black hair; tarsal joint black and black-haired, pale at apex. 

 Legs brownish yellow, the thighs black beneath, except at apex, and 

 with distinct blackish rings above; the following joints less distinctly 

 ringed. (Thorell.) 



The tibial joint is a little broader and, at least when seen from the 

 side, slightly longer than the patellar joint, gradually but very slightly 

 thickened toward the apex; the tarsal joint is fully as long as the two 

 preceding joints together, about double as broad as the tibial joint, 

 nearly ovate, but strongly narrowing toward apex, very convex. For 

 structure of bulb see PI. XV, figs. 6 and 7. 



Total length, 6 mm. Length of cephalothorax, 3 mm. ; width, 2.5 

 mm. (nearly). 



Length of leg I, 10 mm. 



Length of leg II, 9.5 mm. 

 -Length of leg III, 9.5 mm. 



Length of leg IV, 14 mm. ; tib. + pat., 3.5 muL 



Syn.— 1877. Lycosa uncata Thorell, Bull. U. S. G. S. of Terr., 3, p. SOS. 

 1894. Pardosa dorsalis Banks, J. N. Y. Ent. Soc, 2, p. 51. 

 1894. Pardosa uncata, Eiwrtoa, Trans. Conn. Ar-ad. Sci., 9, p. 425, PI. 3, 

 figs. S to 8/. 



Type locality. — Mackenzie River. 



Known localities. — Colorado!, Utah!, Idaho, Canada. 



Pardosa longispinata Tullgren, 1901. 



(Bill, till sv. Vet.-Akad. Handl., Band 27; Old. IV, No. 1, p. 23.) 

 Female. — Cephalothorax dark brown, clothed with short adpressed 

 and long black upturned bristly hairs, with a white middle-band, 



