1902.] NATUKAL 8CIE>;CK9 OF PHlL.AUJiLjr'HlA. 537 



1. — Submarginal light band of cephalothorax very flis- 

 tinct, generally a dark annular mark on sternum, 



ocreata pulchra. 



2. — Submarginal light band of cephalothorax indistinct, 



no dark markings on sternum, , . . relucens. 



JI. — Sides of cephalothorax blackish or dark-brown, sternum 



darker than legs. 



1. — Sternum without hairs, under surface of coxre and 



abdomen black, sepulchmlis. 



2. — Sternum with hairs, under surface of coxre and abdo- 

 men not black, 

 (a) — Legs comparatively thick, fourth leg not four 

 times the length of the cephalothorax, labium 

 deep black its entire length, . charonoides. 

 (6) — Legs very slender, the fourth leg at least four 

 times the length of the cephalothorax, labium 

 lighter at its distal end. 

 (1) — Legs distinctly banded, dorso-median 

 band of cephalothorax constricted at its 



middle, stonei. 



(2) — Legs not distinctly banded, dorso-median 

 band of cephalothorax not constricted 

 at its middle, .... verisimilis, 

 C. — Length of cephalothorax 5 mm. or more. 



I. — Abdomen with a distinct broad dorso-median dark band 

 along its entire length. 

 1. — First leg thickest, not 2^ times the length of the 



cephalothorax, arenicola. 



'2. — First leg not thicker than the others, more than three 

 times the length of the cephalothorax. 



(a) — Sternum black, pundulata. 



(6) — Sternum yellow, scniulata. 



II. — Abdomen above without a distinct broad dorso-median 

 dark band along its entire length. 

 1. — Venter light without dark markings, middle eyes of 

 first row considerably larger than the lateral, 



cinerea. 



2. — Venter dark or with dark markings, middle eyes of 



first row usually not larger than the lateral. 



(a) — Cephalothorax not distinctly banded, or with a 



median band nuich narrower than the eye 



area. 



(1) — Middle eyes of the first row smaller than 

 the lateral, .... caroliiiensis. 

 (2) — Middle eyes of the first row larger than 

 the lateral. 



