202 SUPPLEMENT TO 



fig. B, PL XV., p. 198 {Ctpniza Calif ormca)jYom this 

 gentleman alive, and still within the remaining portion 

 of her nest, on the 6th of July, 1873. She then had 

 the legs and cephalothorax of a brownish-black, and 

 the abdomen of a dull, uniform, dusky chocolate brown, 

 but with an indistinct median line near the anterior end 

 on the upper side, intersected at right angles by a 

 shorter line. Mr. Treadwell said, however, that when 

 captured, this spider was much darker, and of a pitchy 

 black colour. The hairs all over the body were short, 

 but especially so on the abdomen, which had the ap- 

 pearance of cloth or felt. 



This creature in many ways recalls Cteniza fodiens 

 of Corsica, and in a less degree the Cteniza of Mentone 

 and San Eemo. 



We find not only the same general form of body, 

 but also the same claws furnished with only one 

 tooth, instead of many as in JS'emesia, and other 

 distinctive features ; and it is interesting to observe 

 in the nest that the more semicircular form of the 

 door and the wider hinge also connect it rather with 

 Cteniza than with Nemcsia. 



Here, as in all spiders yet observed in cork nests, 

 we find the habit of resisting any attempt to open the 

 door, and many a time when I have wished to raise 

 the lid in order to drop in flies or other food, I have 

 been obliged to desist because the bending blade of 

 my penknife showed that I should injure the nest if 

 I used greater force. 



No doubt the shallowness of the nest is an advan- 

 tage to its occupant in one way — namely, that it 

 enables the spider to start up at the shortest notice, 

 and cling on to the door. 



