174 PROCEEDINGS OF THE ACADEMY OF [May, 



2. Anterior depressed lobe of bulb separated into two furrows by an 



elevated narrow fold extending from above obliquely dow^nward 

 and outward, externally from its lower end being two uncate 

 tenacula and at the corner opposite its upper end a lamellate, 

 inflexed chitinous angle (PI. XI \^, fig. 8), . . lapidicina Em. 

 Not so, 3. 



3. Anterior division of bulb presenting a large, trilobed thickening 



transversely across its upper border from base of embolus out- 

 ward, the ends of lobes recurved over the furrow posteriorly 



from them (PI. XIV, fig. 4), californica (Keys.). 



Not so, 4. 



4. Embolus extending across bulb almost to outer side of alveolus 



(PI. XV, fig. 4, var. brunnea; PI. XV, fig. 2, type form), 



modica (Bl.). 

 Apex of embolus scarcdy extending beyond scopus, 



groenlandica Th. 



7. Scopus extending obliquely forward and outward quite to or some 



distance beyond margin of alveolus, 8. 



Not so, 10. 



8. Scopus curving forward with convexity external and apex directed 



forward, emertoni Chamb. 



Not so, 9. 



9. Embolus strongly bent into an S shape; scopal spur turned forward 



at apex (PI. XIII. fig. 6), sternalis (Th.). 



Embolus but little curved, extending nearly straight transversely; 

 scopal spur turned backward at apex (PI. XIII, fig. 2), 



saxatilis (H.). 



10. Scopus above bent outward and then strongly backward, becom- 



ing nearly parallel with basal part (PI. XV, fis;.9), distincta Bl. 

 Not so, ^ .... 11. 



11. Scopus dentate at apex; the spur nearly straight, subcorneal (PI. 



XV, figs. 6 and 7), mackenziana (Keys.). 



Scopus not dentate at apex, 12. 



12. Spur short and stout, abruptly turned posteriorly at apex into an 



acute hook (PI. XIII, fig. 4), milvina (H.). 



Spur cylindrical, longer, pauxilla Mtg. 



Males of the following species are either unknown or are too 

 imperfectly known to the author to be included in the foregoing key : 

 atra, banksi, lahradorensis, longispinata, moesta, xerampelina. 



Pardosa saxatilis (Hentz), 1844. 



(J. Bost. 8oc. \. Hist., p. 392, PI. XVIII, figs. 9, 10.) 

 Female. — Sides of cephalothorax deep brown to black crossed with 

 lighter radiating lines ; a median reddish yellow band which anteriorly 

 sends a short narrow process between eyes of the third row, behind 

 which it abruptly widens, constricted midway between the eyes and 

 the doi'sal groove, behind which it is strongly narrowed, sides of band 



