372 ON THE PEDIPALPI OF NORTH AMEPtlCA. 



G. PHAIODACTYLUS. — (J. brunneo-fulvus ; cephalothorace sparse punctato, medio Icviter canaliculato, 

 antico et abbreviato et rotundato et nonnihil emarginato, postico transverse sulcato; manibus cau- 

 daque venuste politis et pedibus nonnihil pilosis ; palpis robustis, angulis vel valde crenulatis vel 

 denticulatis, articuli tertii superficie antica spinulo unico (interduni duobus) ; manibus valdissime 

 tumidis, longis, indistincte octoplicatis ; digitis. latis, robustissimis, modice brevibus, curvatis, mar- 

 ginibus opponentibus acute denticulatis ; pedibus flavis ; abdomine laeve ; cauda breve, cristis 

 superioribus obsoletis, superficie superiore nonnihil minute granulata ; articulo quarto haud carinato ; 

 articulo ultimo maximo, spiculo parvo sine spinulo basali ; pectinis dentibus 7 — 9. PI. 40, 

 fig. 3, 3a, 36. 

 O. phaiodacti/lus, Wood. Proc. Acad. Nat. Sci., April, 1863. 



The cephalothorax is not produced as far anteriorly as is commonly the case. 

 It is impressed with a faint transverse groove at the position of the median ocelli, 

 and with another, more distinctly defined, on its posterior third. These channels 

 separate three pairs of slightly pronounced elevations, which successively decrease 

 in size from the first. The first joint of the palpi has all of its margiilfe armed with 

 distinct obtuse denticules, excepting only the postero-inferior, which is rounded and 

 concave, and crenate only on its proximal third. The third article is much larger 

 than the second, and has only its anterior margins crenate. Its posterior surface 

 as well as that of the hand, is sparsely and irregularly punctate. The anterior 

 aspect of the hand is minutely tuberculate. The first joint of the mandibles is 

 very long, almost always extending as far forward as the cephalothorax, and often 

 much beyond it. The distal portion of these organs, with the " jiincers," is black. 

 The median eyes are placed upon a single black elevation in the middle third of the 

 cephalothorax. The first two lateral ocelli are somewhat smaller than the median ; 

 the third is much smaller ; the fourth is at right angles to the third, and is still less. 

 The three anterior joints of the tail are short and rather broad. Their superior 

 crests are entirely, and their supero-lateral almost, obsolete ; their inferior and infero- 

 lateral are well marked and broadly crenate. All of the ridges of the fourth 

 segment are obsolete. The penultimate joint is elongate and slender. Its lower 

 surface is rough, and has two strongly, but obtusely denticulate, infero-lateral, and 

 a single median inferior crest. The last segment is immensely swollen. Its distal 

 poi'tion is suddenly and very strongly contracted, and then inflated slightly again, so 

 as to form a knob, as it were, on the base of the sting. 



Length of body, li^ inches ; of tail, li inches. 



Hah. — Utah Territory. Smithsonian Museum. M. McCarthy, Esq. 



Vaejovis cakolinus. — " Gelbraun, dunkelbraun gefleckt; die Taster rostfarbig mit rundrippigen 

 HVinden ; der Schwanz ziemlich dick, oben und unten mit gezilhnten Kiclen. 

 " Liiug des Vorder-und Hinterleibes 4J"', des schwanzes GJ'". 



"Der Vorderleib hinten breit, im Ganzeu nieder, oben etwas flach uud schwielig, fast glanzlos; die 

 Mittelfurche voni Vordcrrande bis zuni Tlinterrando durehziehend, ziemlich tief. die zwei Kiclc auf dem 



