564 Ri:V. O. P. CAMBRIDGE ON EGYPTIAN SPIDERS. [June 20, 



yellow mottled colour of which the colour of the Spider so admirably 

 agrees that it requires a practised eye to detect it ; and in fact its 

 movement is generally the first cause of its detection. Its specific 

 name is conferred in compliment to M. H. Lucas, of the Jardin 

 des Plantes, Paris, to whom we are indebted for descriptions and 

 figures of so many North-African Spiders. 



Fam. Scytodides. 

 Gen. Loxoscelis, Heinek. et Lowe. 



LoXOSCELIS RTJFESCENS. 



Lo.coscelis rvfescens, Duf. An. Sc. Phys. t. v. p. 203, pi. 76. 



Scytodes rufescens, Sav. Egypte, pi. v. fig. 2. 



Adult and immature females of this Spider were found among the 

 ruins of an old mud wall near Cairo, and an immature male in a 

 similar situation at Alexandria. 



Gen. Scytodes. 



Scytodes thoracica. 



Scytodes thoracica, Walck. Ins. Apt. i. p. 2/1. 



An immature female of a Spider which is probably only a variety 

 of this species, was found in an old building at Cairo. The only ap- 

 parent difference between this example and the typical S. thoracica 

 consists in the very faintly marked cephalothorax, the abdomen 

 marked only with two converging rows of black spots on the hinder 

 half, and the legs wholly immaculate. The discovery, however, of 

 adult examples may possibly prove it to be of a distinct though 

 closely allied species ; at present it would scarcely be justifiable to 

 found a new species upon a single immature example. 



Dr. L. Koch (iEgyptische und Abyssinische Arachniden, Niirn- 

 berg, 1875, p. 27, Taf. hi. fig. 2) describes and figures a new species 

 from Cairo (S. immaculata) ; from this, however, the present Spider 

 differs quite as much as from the typical thoracica, though possibly 

 it may eventually prove to be a variety of Koch's Spider instead of 

 *S. thoracica. 



Scytodes kochii, sp. n. 



Female, immature, rather over 1| line in length. 



Although the cephalothorax of this Spider is but little higher at 

 its posterior than at its anterior extremity, it is, I believe, a true 

 Scytodes. The clypeus is broad, truncate, and a little upturned at 

 its lower edge, its height being about equal to the dimensions of one 

 of the fore central pair of eyes ; the colour of the cephalothorax is a 

 rather bright orange-yellow, with a deep-brown band running back- 

 wards from each lateral pair of eyes nearly, if not quite, to the 

 hinder margin ; these bands are broadest about the middle, and each 

 is marked with a slightly oblique longitudinal stripe of orange-yellow 

 near the fore extremity ; and between them is a deep-brown tapering 

 line running a little way backwards from the central pair of eyes. The 



