302 ARACHNIDES. 



band, grey in the middle, runs along its under surface. The 

 legs are annulated with black. This species was discovered by 

 the naturalist to whom I have dedicated it, in the environs of 

 Bourdeaux. M. Dufour has since found it in the most barren 

 mountains of Valencia. It runs with great volocity, the feet 

 being extended laterally. Its unguiculated palettes enable it to 

 cling to the smoothest surface, and in every possible possition. 

 It constructs a cocoon, which in texture resembles that of the 

 Clotlio of Durand, on the under surface of stones, to which it 

 retires for shelter in bad weather, to escape from enemies, and to 

 lay its eggs. It is an oval tent, nearly two inches in diameter, 

 attached to the stone in the manner of a marine Patella. It is 

 formed of an external envelope, consisting of a yellowish taifeta, 

 as fine as the peel of an onion, but rigid, and of an inner lining 

 which is more supple, softer, and open at both ends. It is from 

 these openings, which are furnished with valves, that the animal 

 issues. The cocoon is globular, and placed underneath its 

 dwelling, so that it can brood over it ; it contains about sixty 

 eggs. 



The same naturalist has described and figured another species, 

 the M. a tarses spongieux — Ann. des Sc. Phys., V, Ixix, 6 — 

 which he found on a tree in a garden at Barcelona. From its 

 habits, however, and some of its characters, I presume that it 

 belongs to the genus Philodroma of Walckenaer *. 



Senelops, Duf. 



The Senelops form the transition from the preceding genus to the 

 following one. The jaws are straight or but slightly inclined, with- 

 out any lateral sinus, and taper to a point obliquely truncated on the 

 inner side. The ligula is semicircular like that of the Micrommatae, 

 but the eyes are arranged differently. There are six before forming 

 a transverse line ; the two others are posterior, and situated one on 

 each side, 'behind each extremity of the preceding line. The legs are 

 long ; the second pair, and then the third and fourth, are longer than 

 the first. 



The type of the genus, Senelops omalosoma, Dufour, Ann. des 

 Sc. Phys. V, Ixix, 4, was found by M. Dufour in Valencia, but 

 it is very rare there. The body is about four lines in length 

 and very flat, of a greyish red, with cinereous spots ; the feet 

 are annulated with black. The posterior part of the abdomen 

 seems to exhibit vestiges of annuli, forming on the sides an ap- 

 pearance of teeth. It lives among rocks, and when escaping 

 from pursuit flies Avith the rapidity of an arrow. It is also 

 found in Syria — Collection of M. Labillardiere — and in Egypt. 



* For the other species, see the Tab. des Aran., Walck., and his Hist des Aran., 

 fascic. IV, Sparassus roseus, X, the male ; — lb., fascic. II, viii, the male. I think 

 we should refer to this subgenus the Aranea venatoria, L., — Sloane's Hist, of Jam., 

 CCXXV, 1,2; Nhamdiu, 2 ? Pison ; — and another species from India very analo- 

 gous to the preceding, figured on Chinese drawings and paper-hangings. 



