PULMONARI^. 193 



without any lateral sinus, and taper to a point obliquely truncated 

 on the inner side. The ligula is semicircular like that of the Mi- 

 crommatae, 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 arnong rocks, and when escaping 

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

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

 Other species inhabit Senegal, the Cape of Good Hope and the 

 Isle of France. 



Philodromus, Walck.(l) 



The Philodromi diff'er from the two preceding subgenera in their 

 jaws, which are inclined on the ligula, which is also higher than it 

 is wide. The almost equal eyes always form a crescent or semi- 

 circle. The lateral ones are never placed on tubercles or eminences. 

 The chelicerE are elongated and cylindrical; the four or two last 

 legs do not materially diff'er in length from the others. 



According to Walckenaer these animals run with great swiftness, 

 their legs extended laterally, lie in wait for their prey, throw out 

 solitary threads to entrap it, and conceal themselves in crevices or 

 among leaves. 



In some the body is broad and flat, the abdomen short and 

 widened posteriorly, and the four intermediate legs the longest. 

 Such is the Philoclrome tigree; Thomise tigre, Lat.; Araneus 

 marguritarius, Clerck, VI, iii; Schseff*., Icon;, Ixxi, 8; Frisch, 

 Ins., Centur., II, xiv; Arcinea levipes, L. ? It is about three 

 lines in length. Its two anterior intermediate eyes and the 

 four lateral ones are situated on a slight elevation, and the lat- 

 ter, according to the same naturalist, are somewhat the largest, 

 or at least are more apparent. The thorax is very wide, flat- 

 tened, of a reddish fawn colour, brown laterally and posteriorly, 



(1) In the first edition of this work, this subgenus formed our first division of 

 the Thomisi. 



Vol. III.— Z 



