204 PROCEEDINGS OP THE ACADEMY OF [May, 



diameter from front margin of clypeus; eyes of second row their diam- 

 eter apart; quadrangle of posterior eyes one-fourth the length of the 

 cephalothorax, as wide in front as long. 



Teeth of the margins of the furrow of the chelicercB of the typical 

 arrangement and form. Labium of the same width as length or 

 nearly so; labium about four and a half times longer than its basal 

 excavation; attenuated as usual; sides above straight; front margin 

 straight. 



Legs with the tibia + patella of the fourth pair a little longer than 

 the metatarsus or sometimes of the same length ; tibia + patella of the 

 first legs evidently shorter than the cephalothorax; spines of tibiae 

 and clothing of tarsi as usual. 



The epigynum in its general form resembles that of groenlandica ; 

 the septal piece of guide is more abruptly depressed anteriorly, usually 

 widened into a quadrangular form at front of the wide foveas and then 

 clavately widening caudally ; transverse arms of guide more conspicu- 

 ous, strongly bent forward at their ends; posterior ends of lateral 

 ridges more widely separated. (PI. XV, figs. 1 and 3.) 



Total length, 9 mm. Length of cephalothorax, 4 mm. ; width, 3 mm. 



Length of leg I, 9.5 mm. ; tib. + pat., 3.3 mm. ; met., 1.7 mm, 



liength of leg II, 9.2 mm. 



Length of leg III, 9.2 mm. 



Length of leg IV, 13.7 mm. ; tib. + pat., 4.2 mm. ; met., 4 mm. 



Male. — Coloration similar to that in female but darker; the median 

 band of cephalothorax obscured in front of the dorsal groove; lateral 

 light stripes narrow and indistinct or obscured; light markings of the 

 abdomen indistinct. 



Tibia of palpus of about the same length as the patella but evidently 

 stouter, enlarged distad; sides of patella, seen from above, parallel; 

 tarsus very broad, one and three-fourth times as broad as the tibia, 

 ovate, acutely pointed. Palpal organ very similar to that of groen- 

 landica, but the embolus is relatively longer and there are differences 

 in the conductor, etc. (PI. XV, figs. 2 and 4.) 



Total length, 8 mm. Length of cephalothorax, 4 mm.; width, 

 3.2 mm. 



Length of leg I, 10.4 mm. ; tib. + pat., 3.G mm. ; met., 2.1 mm. 



Length of leg II, 10.5 mm. 



Length of leg III, 10.1 mm. 



Length of leg IV, 12 nnn. ; tib. + pat., 4.2 mm. ; met., 43 mm, 



Syn. . Lycosa glacialis Thorell. Ofvers. af. Vet. Akad. Forh., 29. 



1875. ? Lycom furcifera Thorell Proc. Bost. Soc. N. Hist., 17, p. 499. 



