30 OF PHILADELPHIA. 



Length about two inches and a half. [U-l] 



I have not known this species to inhabit so far north as Penn- 

 sylvania. 



Genus CRYPTOPS Leach. 



Anterior edge of the labium not denticulated, hardly emar- 

 ginate; eyes obsolete; posterior pair of feet longest; basal joint 

 unarmed. 



1. C. HYALINA. — Body much depressed, white, with a double 

 blackish internal line ; hind feet with third joint five toothed. 



Inhabits Georgia and East Florida. 



My Cabinet. 



Head reddish-brown, polished, impunctured, with scattered 

 hairs, no impressed clypeal line ; antennas reddish-brown hirsute, 

 joints sessile, cylindric, terminal ones rounded : body white, 

 polished, two black internal lines, a few sparse hairs, impunc- 

 tured ; feet with a few hairs ; posterior feet reddish-brown, first 

 joint not so long as double its breadth, and with the second joint 

 armed with numerous short, rigid setae, with an indented line 

 above ; third joint four or five toothed within, fourth joint about 

 two toothed. 



Length three-fifths of an inch. 



Numerous specimens of this species occurred beneath the de- 

 caying bark of a live oak (Q. virens) on the River St. John, East 

 Florida. The appearance of the posterior feet approximates it 

 to Scolopendra ; [112] but the eyes exclude it from that genus, 

 as the number of the feet does from Lithohius. 



2. C. SEXSPINOSA. — First joint of the posterior feet two spined. 

 My Cabinet. 



Body reddish-ferruginous, punctured ; second segment shortest, 

 then the fourth and sixth, terminal one indented at tip, and 

 armed beneath with a double, prominent, robust spine ; antennae 

 with very short dense hair, joints oval, separated by a very short 

 peduncle ; feet, two moveable short spines at the exterior tip of 

 the fourth joint; fifth joint with one beyond the middle and one 

 at tip ; posterior feet, the base beneath a conspicuous, elevated, 

 compressed, acute, sub-triangular spine, and a smaller one on 

 the inner side above, near the middle. 



Not uncommon in decaying wood. It varies in being impune- 



[Vol. II. 



