UNITED STATES. 6i 



animal resembles Phoxichilus in being destitute of 

 palpi, but (lifters from it in having didactyle mandi- 

 bles and simple nails. In the form of the mandibles 

 it resembles Nymphon and Ammothoea but the want 

 of palpi distinguishes it from those genera, its pro- 

 per situation is probably next to the genus Phoxichi- 

 lus. It, unquestionably, is generically the same with 

 Phalanghim aculeatum of Montague, (Trans. Lin. 

 Soc. vol. 9, tab. 5,) which Dr. Leach, in the article 

 Cmstaceology of Brewster's Encyclopaedia, refers to 

 the genus Nymphon, but which, as far as I can dis- 

 cover, he has omitted in his subsequent works. It 

 will of course be a second species of this new genus. 



order II. POLYMEROSOMATA. 



family 3. SCORPIONIDE.E. 



Genus BUTHUS. Leach. Scorpio, Latr. 



Palpi brachiform, didactyle ; eyes eight ; abdomen 

 terminated by a caudal process of six articulations, of 

 which the terminal one is armed with a venomous 

 aculeus. 



Species. — B. *vittatus. Fuscous, with three ful- 

 vous vitta ; sides black. 



Inhabits Georgia and Florida. 



Cabinet of the Academy. 



Body above granulated, granules irregular, distant, 

 three fulvous equal vitta, and an elevated, interrupted 

 vertebral line ; sides black, rugose, beneath white ; 

 thorax reddish brown, more scabrous before and be- 



