PHALANGES OF THE UNITED STATES. 



25 



5. Phalangium cinereum Wood (nov. sp.). 



5a, male (natural size); 5b, female (natural size); 5c, penis, lateral and 

 anterior views (magnified). 



Body large. Dorsum with small, acute spinous tubercles on the 

 abdomen arranged in transverse series generally one row to each seg- 

 ment ; the base of these little tubercles are whitish, their acute apices 

 blackish ; color of dorsum grayish with a central darker vase-shaped 

 marking commencing at the head; the flanks more or less mottled. 

 Cephalothorax not distinctly separated from the abdomen. Segmen- 

 tation of the abdominal scutum distinct. JEije eminence not very prom- 

 inent, light-colored, with a row of tubercles similar to those on the 

 dorsum surmounting each of the black eyes. Falpi light brown, mod- 

 erately long, with numerous, short, rigid, black hairs, which are more 

 pronounced in the male than in the female. Legs very long and slen- 

 der, with numerous black spines arranged in rows, which are more 

 pronounced in the male than female, light brown with darker annuli, 

 which are, however, often obsolete especially in the male. Coxce 

 as well as ventral surface smooth, grayish brown, with darker irreg- 

 ular spots. Trochanters grayish, with small spines. Penis broad, 

 rather thick, with distally two lateral oval openings, and immediately 

 contracted into a short, blunt, obtuse process, which is bent at an 



COMMUNICATIONS ESSEX INSTITUTE, VOL. VI. 4 JULY, 1868 



