208 THE CANADIAN ENTOMOLOGIST. 



male palpi are quite simple in structure. Our genera may be separated 

 by the following table : 



J M. E. *in front of A. S. E Usofila 



[M. E. not as far front as A., S. E 2 



Jm. E. in front of P. S. E Segestria 



(M. E. as far back as P. S. E 3 



J Three claws to tarsus Ariadne 



[Two claws to tarsus Dysdera 



Usofila gracilis, Keys. 



Marx in Proc. Ent. Soc, Wash., 1890, Vol., II., p. 36, pi. I., fig. 6. 

 Alabaster Cave, Cala. 



This is quite unlike other Dysderidce \n general appearance, but is 

 referred by Keyserling to this family. 



Dysdera interrita, Hentz. 



D. crocata, Koch. Marx Cat. Aranae of temp, of N. Am., 1890. 



D. interrita., Hentz. Proc. Bost. Soc. Nat. Hist., Vol. IV , p. 224, 1842. 



« " " Spid. U. S., ed. Burgess, p. 20, pi. II., fig. I., 1875. 



" " " Emerton, New Engl., Drass., Agal. and Dysd., 



p. 36, pi. VIII., fig. 2, 1890. 



New Engl., N. Y., D. C, Md., Va. 



Ariadne bicolor, Hentz. 



Fylarus bicolor, Hentz. Proc. Bost. Soc. Nat. Hist., Vol. IV , p. 225, 



1842. 



" " " Spid. U. S., ed. Burgess, p. 21, pi. II., fig. 



3. 1875. 



" pumilis, Hentz. Proc. Bost Soc. Nat. Hist, Vol. IV., p. 



226, 1842. 



" " " Spid. U. S., ed., Burgess, p. 22, pi. II., 



fig- .S> 1875. 



*M.E. — median eyes; A.S.E. — anterior side eyes; P.S.E. — posterior side eyes. 



