24 ACADEMY OF NATURAL SCIENCES 



longer than the body, and with much longer hairs than those of 

 the body. 



Inhabits several species of Tiptda. 



This is readily distinguishable from the 0. rubra Leach, by 

 the elongated hairs of the feet. The specimens in my possession, 

 are so disposed that the trophi cannot be examined, I therefore 

 refer them to this genus by analogy, drawn from habit, &c. 



[Prom Vol. 2, 1821, pp. 102—114.] 

 Descriptions of the MTRIAF0D.3: of the United States. 



Read NoTember 21st, 1820. 



Class MYEIAPODA. 



Order 1. CHILOGNATHA. 



Genus JULUS. 



Body serpentiform, cylindrical ; antennae inserted on the ante- 

 rior margin of the head, second joint longest, terminal one mi- 

 nute ; eyes distinct ; feet many. 



1. J. IMPRESSUS. — Brown, a series of lateral black dots, 

 beneath yellowish-white ; ultimate segment mucronate. 



My Cabinet. 



Body cylindrical, immarginate, above brownish, beneath yel- 

 lowish-white appearing glabrous : segments each with a lateral 

 black spot, whitish lines and dots sometimes obsolete, a trans- 

 verse series of longitudinal abbreviated obsolete impressed lines, 

 and beneath the stigmata with impressed, more distinct ones, ulti- 

 mate segment mucronate, spiracles not prominent; eyes rather 

 large, conspicuous, black ; labrum yellowish white ; Antennae 

 brownish. 



A common species inhabiting under stones, and in humid sit- 

 uations, a variety occurs with a very distinct, acute, longitudinal, 

 dorsal line, and variegated head. 



2. J. PUNCTATUS. — Body brownish, with an impressed dorsal 

 line, impressed white dots and spots, ultimate segment unarmed. 



My Cabinet. [103] 



Vol. 11 



