194 ARACHNIDES. 



and white anteriorly. The abdomen, which forms a kind of 

 pentagon, is speckled by the red, brown and white hairs which 

 cover it, and edged laterally with brown; there are four or six 

 impressed points on the middle of the back. The belly is 

 whitish, and the legs are long, slender and reddish, with brown 

 spots. 



This species is very common on trees, wooden partitions, 

 walls, &c, where it remains as if glued, with the feet extended. 

 If touched, it runs with astonishing rapidity, or falls to the 

 ground supported by a thread. The cocoon is of a beautiful 

 white, and contains about a hundred eggs, which are yellow 

 and free. The female places it in hollows of trees or clefts of 

 posts, Sec, exposed to the north, and carefully watches it. 

 The other Philodromi, which, according to the method of M. 

 Walckenaer, form several small groups, have the body, and some- 

 times the chelicerae, proportionably longer. The abdomen is some- 

 times pyriform or ovoid, and sometimes cylindrical. The second 

 pair of legs and then the first or the fourth are the longest. 



Philodromus rombiferus, Walck., Faun. Franc, Aran., VI, 

 8, the male. Its body is three lines and a half in length and 

 reddish; the second legs and then the two last are the longest; 

 sides of the thorax brown; the abdomen ovoid, with a black or 

 brown lozenge-shaped spot above, bordered with white. 



Philodromus oblongus, Walck., lb., tab. ead., fig. 9. This 

 species, as respects the relative proportion of the legs, and the 

 disposition of the eyes, belongs to the same division; but the 

 abdomen is longer and almost cylindrical or forming an elon- 

 gated cone, with three brown longitudinal streaks and points 

 on a yellowish ground, which is also the colour of the thorax. 

 In the middle of the latter are two brown streaks forming an 

 elongated V. 



Th.ese two species inhabit the environs of Paris. For the 

 other, see the Faune Franeaise, from which we have extracted 

 the preceding descriptions. 



Thomisus, Walck. 



The Thomisi differ from the Philodromi in their chelicerae, which 

 are smaller in proportion and cuneiform, and in their four posterior 

 legs, which are evidently and even suddenly shorter than the pre- 

 ceding ones. The lateral eyes are frequently situated on eminences, 

 while those of the Philodromi are always sessile. Here also the two 

 posterior lateral ones are further behind than the two that are inter- 

 mediate on the same line, while in the Thomisi these four eyes are 

 nearly on a level. 



