3G0 ON THE TEDIPALPI OF NORTH AMERICA. 



* * * * Lateral eyes arranged in a curved series. Sting icithotit tJie hasal sjmie. 



B. niRSUTUS. — Body and tail very liairy. Cephalotliorax with the anterior margin 

 convex and not emarginate. Length 4^ inches. 



B. EMAEGiNATiCEPS. — Body and tail very hairy. Cephalotliorax with the anterior 

 margin broadly and very deeply emarginate. Length 4| inches. 



B. EUSTHENURA. — Body and tail moderately hairy. Hands very small and slender. 

 Last caudal segment rather large and robust. Sting very short and i-obust, strongly 

 curved. 



B. BOEEUS. — Body and tail scarcely at all pilose. Hand tumid. Superior crests of 

 anterior caudal segments not terminating in a spine. Last article quite large and 

 robust. Sting rather short and robust, but very slightly curved. Length 3 inches. 



B PUNCTIPALPI. — Hand tumid. Superior crests of anterior caudal segments termi- 

 nating in a si^ine. Last article small and slender. Sting very long and slender, 

 strongly curved. 



B. SPINIGERUS. — Hand small, scarcely at all tumid. Suporiorcrest of anterior caudal 

 segments terminating in a spine. Last article large and robust. Sting short, robust, 

 and rather strongly curved. Length 2| inches. 



Gen. in. CENTRURUS, Oculi 10. 



C. PiiAiODACTTLus, Hand very much swollen. 



Species unknown to us. 

 S. PUNCTATUS, De Geer. 

 S. MACULATUS, De Geer. 

 S. TESTACEus, De Geer. 

 S. AuSTRALis, De Geer. 



ViEJOVIS CAROLINUS, Koch. 



Gen. I. SCORPIO. 



Oculi G. Oculi laterales utrin(|uc 2. 



Scorpio, De Geer, Mem. dcs Tusect., vol. vii. p. 337. Haud Scorpio, Linnaeus. 



Scorpius, Ehrenberg, Symbol.T3 Physica). 



" Fain. I. Scorpioniiles." Koch Arachniden, Syst., p. 36. 



S. ALLENii.- — S. saturate brunneo-castaneus, laevis, venuste politus ; cephalothorace antico distincte emar- 

 ginato; palpis modicis; manibus magnis, subquadrangulatis, latis, vix crenatis, sparse punctatis; digitis 

 robustis, modice brevibus, fere rude punctatis, curvatis; oculis lateralibus fcrc a^qualibus ; cauda breve, 

 valde crenulata; spicule brevissimo, subuncinato, siue spiuulo basali; pectinis dcutibus fere 7. 

 S. Allenii, "Wood, Proc. Acad. Nat. Sci. April, 1863. 



The dorsum is beautifully polished, and not at all tuberculate. The palpi are of 



