Mr. J. Blackwall on newly discovered species q/" Araneidea. 93 



History. — Discovered by the author in the Isle of Wight in 

 1850, and by M. Cotteau in France in 1851, but first described by 

 the latter in his ' Catalogue Methodique des Echinides recueillis 

 dans Petage Neocomien/ and which brochure I received since 

 I read this communication. As there is no figure of this Urchin 

 extant, I intend giving one of the beautiful specimen before 

 me, along with some other new forms of that group which I hope 

 shortly to publish in the ' Annals of Natural History.' 



X. — Descriptions of some newly discovered species o/ Araneidea. 

 By John Blackwall, F.L.S. 



In November 1850, Francis Walker, Esq., of Arno's Grove, 

 Southgate, afibrded me an opportunity of inspecting an exten- 

 sive collection of spiders made by him in England and Switzer- 

 land in the " summer of the same year ; and a request that I 

 might be permitted to describe the following species comprised 

 in the collection, which appear to be new to science, was most 

 obligingly complied with by Mr. Walker. 



Tribe OCTONOCULINA. 



Family LYCosiDiE. 



Genus Lycosa, Latr. 



1. Lycosa calida. 



Length of the male ^th of an inch; length of the cephalo- 

 thorax J^ ; breadth -^^^ ; breadth of the abdomen -^-j. ; length of a 

 posterior leg /^ ; length of a leg of the third pair y^^j. 



Cephalo-thorax large, convex, glossy, compressed before, with 

 a slight longitudinal indentation in the medial line of the pos- 

 terior region ; its colour is dark brown, approaching to black at 

 the anterior part ; a broad band of reddish brown extends along 

 the middle, another occurs on each side, and a narrow one of the 

 same hue is situated immediately above each lateral margin. 

 Four of the eight eyes are minute and form a transverse line in 

 front, the two intermediate ones being somewhat larger than the 

 lateral ones ; the other four are large, and are situated on the 

 sides and in front of the cephalo-thorax, constituting a quadri- 

 lateral figure, whose anterior side is rather the shortest ; the 

 anterior eyes of the quadrilateral are the largest of the eight. 

 Falces conical, perpendicular, armed with a few teeth on the 

 inner surface, and of a pale reddish brown colour, with two ob- 

 scure, longitudinal streaks of dark brown in front. Maxillae 

 strong, short, straight, somewhat enlarged and rounded at the 



