On EUROPEAN SPIDERS. 65 
us and Dictyna) in the Laterigrade, Citigrade and Saltigrade, as well as 
in the Zerritelarie that I have had the opportunity of examining, namely, 
the presence of accessory claws, together with the (three) ordinary genuine 
claws, at the end of the tarsi’). These accessory claws are perhaps of 
as much importance for the animal's industry and for the determination of 
its systematic position, as the infra-mammillary organ and calamistrum; the 
presence of these claws in Uloborus may surely therefore be considered as 
an additional reason for referring that genus to a family where they al- 
ways occur, and separating it from forms, in which I have never observed 
them. By considering Uloborus as the type of a separate sub-family of 
the Epeiroidæ, sufficient notice is certainly taken of the deviations of that 
genus from the typical Epeiroidæ. — Besides the genera Uloborus, Hyptio- 
tes and Zosis, it is probable that also Cyllopodia Hentz (Aran. of the Uni- 
ted States, in Bost. Journ. of Nat. Hist., V, p. 466), which is reported to 
have only six eyes, belongs to the sub-family Uloborine. 
Genus 9. ULOBORUS Larr. 1806. 
Deriv.: ovAofíógoc, with deadly bite (oddoc, deadly, BBçgwoxw, eat). 
Syn.: 1806. Uloborus LATR., Gen. Crust. et Ins., I, p. 109. 
1841. 3 Warck., H. N. d. Ins. Apt. IT, p. 227 (ad partem). 
+ 1855. Phillyra HENTZ, Aran. of the United States, in Bost. Journ. of Nat. Hist., VI, p. 25. 
1859. Uloborus THor., Till kànned. om Mithras och Uloborus, p. 194. 
1859. Veleda Brackw., Descr. of six recently disc. spec. etc., p. 95. 
1864. 4 ID., Spid. of Gr. Brit., I, p. 150. 
1864. Uloborus Sım., H. N. d. Araignées, p. 244 (ad max. part.). 
Type: Uloborus Walckenaerii LATR. 
1) By accessory claws (wngwes spurii, secundarii), I mean those unguiform or 
peetiniform appendages, which in the spiders here spoken of are to be found at the 
end of the tarsus, and occasionally also near the ordinary claw at the extremity of 
the palpus of the Q. They are posited generally under or immediately beside, 
though occasionally even above, the genuine claws (ungues veri), from which they are 
easily distinguished by not being eurved downwards, but directed straight forward 
(outwards), sometimes slightly upward. Generally they are slightly curved in the 
manner of an c^; often howeveralmost straight. They are in general smaller, espe- 
cially slenderer, than the genuine claws, and, like them, are on the under side 
(though finer) dentated or serrulated, the serrulation being sometimes of extreme fine- 
ness. They are not always equally developed on the tarsi of the different pairs of 
legs. Their number varies greatly: generally there are 2 or 4, sometimes 6 or even 
more (as in the case of Pholcus) on each tarsus, arranged symmetrically near the 
Nova Acta Reg. Soc. Se. Ups. Ser. III. 9 
