1908.] NATURAL SCIENCES OF PHILADELPHIA. 225 



Not as for lenta or its variety, 24, 



24. All tibiee black at both ends beneath and the-femora black beneath 



at distal end ; large, the cephalothorax 10 mm. or more in length, 



carolinensis W. 

 Tibia and femora not banded thus at ends only beneath ; cephalo- 

 thorax less than 10 mm. long, 25. 



25. Females 26. 



Males, 34. 



26. Lateral depressed areas of epigynum wide, subcircular, not elongate 



in the usual way, 27. 



Epigynum not so, 28. 



27. Guide bearing a short blunt median process posteriorly; ends of 



transverse arms not extending forwards freely to or beyond 

 middle of lateral-depression or fovea (PI. XIX, fig. 2), 



avara (Keys.). 

 No such short median process posteriorly on guide; ends of 

 transverse arms of guide extending forward uncovered to beyond 

 middle of depressed fovea (PI. XIX, fig. 4), 



avara xslt. gosiuta new. 



28. Guide of epigynum inversely T-shaped, the transverse arms 



relatively slender, 29. 



Guide enlarged at posterior end, but not inversely T-shaped or 

 anchor-shaped, 33. 



29. Septum of guide strongly widening from base of transverse arms 



to anterior end, where it extends entirely or nearly across the 



median depression, 30. 



Not so, 31. 



30. Confining walls of epigynum very wide anteriorly (PI. XXI, fig. 3), 



pratensis Em. 

 Not so, the epigynum much like that of helluo (PL XVII, fig. 1), 



floridana Bks, 



31. Transverse piece of guide extending entirely across or almost 



entirely across epigynum behind, some longer than median 

 piece, scarcely confined by side ridges at ends (PL XVIII, fig. 4), 



frond icola Em. 



Transverse piece of guide not so long, distinctly confined by ridges 



at ends, 32. 



32. Septum widest at its anterior end ; lateral walls thick ; epigynum as 



a whole rather wider than long mod esta Keys. 



Not so, septum widest toward middle part of its length, trans- 

 verse arms usually excavated at ends above; epigynum as a 

 whole roughly triangular, being much narrowed anteriorly (PL 

 XVII, fig. 3)^ . erratica H. 



33. Enlarged end portion of guide roughly triangular in shape with the 



apex behind (PL XIX, fig. 8) piciilis Em. 



Expanded end of guide not so shaped, widest behind, where it is 

 truncate (PL XXI, fig. 7), gidosa W. 



34. Anterior row of eyes shorter than the second 35. 



- Anterior row of eyes as long as or longer than the second, . 40. 



