1818.] OF THE UNITED STATES. 39I 



Head obtuse before, beneath gibbous, anterior seg- 

 ments of the body gibbous beneath, subcyhndrical, three 

 last segments shorter, convex above, terminal one small- 

 est, and truncate at tip; second pair of feet with dilated, 

 oval, compressed hands, armed with teeth, one of which 

 is near the base, hnear and almost parallel with the palm, 

 the other large, obtuse, little elevated, placed near the base 

 of the claw; thumb curved, suddenly attenuated within at 

 tip, where it closes on the posterior tooth; branchia short, 

 oval; three posterior pairs of feet armed with curved, 

 acute claws, nearly as long as the preceding joint; termi. 

 nal pair longest. 



Length three tenths of an inch. 



Found on Fuci, &c.; motion moderate, walks like the 

 larvae of the Geometrica, and, like many of them, attaches 

 itself when at rest in an oblique position by means of the 

 three posterior pairs of feet. When recent the eyes are 

 red; antenna and feet annulate with reddish-brown, these 

 annuli resemble spots of short opposite lines. Body with 

 a few scattering reddish-brown spots. 



2. equilibra^. Body, first and second segments equal 

 to one half of the whole length; Jeet^ second pair placed 

 in the middle of the body. 



Inhabits South Carolina. 



Cabinet of the Academy. 



//e^c/ rather small; clypeus rectanfi^'alar, not project- 

 ing into an acute spine; antenncs^ superiores attainir^g the 

 tip of the third thoracic segment, inferiores not attaining 

 the tip of the second joint of the superiores, and ciliatc 

 beneath; body, first and second segments, subequal, cy* 

 Tindric, the latter rather bngcr, and one spined before thc^ 



