TRAP.DOOR SPIDERS. 89 



FAM. THERAPHO SIDES. 



Gen. Cteniza, Latr. 



Ctexiza fodiens. Plate YII. 



Syn. Mygale fodiens, Walck. Ins. Apt., i. p. 237. 



M. Sauvagei, Ausserer, Beitrage zur Kenntruss der Arachniden 

 Jh''amilie der Territelari(B {Thor.), p. 36. 



Female adiilt length 10 lines. 



Cephalothorax oblong oval, somewhat truncate at each end, and 

 of a dull whitish-yellow brown colour, the normal grooves and 

 furrows are strongly marked, the caput is large and elevated, 

 roimded on the sides and slightly higher near the occiput than at 

 the ocular area, the junction of the thoracic segments is indicated 

 by a strong deep curved indentation, the curve directed backwards ; 

 there are a few strong black bristles of different lengths within the 

 ocular space, and several others run backwards in the central line to 

 the occiput. The height of the Clypeus is equal to rather more than 

 the diameter of one of the foremost eyes. The Eyes are eight, and 

 form a rectangular figure whose transverse diameter is the longest, 

 and whose fore side is a little shorter than the hinder one; the longi- 

 tudinal diameter is about equal to the space between the two fore- 

 most eyes ; these are the largest of the eight, and are separated by 

 an interval of very nearly two eyes' diameters ; the two central 

 eyes are the smallest, and are distant from each other just about 

 one eye's diameter, the eyes of the hinder row are in two pairs 

 forming the hinder corners of the rectangle, those of each pair are 

 nearly contiguous to each other, and the inner one of each is the 

 smallest; these last in the figure appear to be the smallest of the 

 eight, but this arises from the point of view whence the figure was 

 drawn ; the two central eyes occupy as nearly as possible the centre 

 of the figure formed by the two foremost eyes, and the two inner 

 ones of the hinder row, and are seated on a large black spot. The 



for this assistance, wliicli will give to my publication a vahie in the eyes of 

 Arachnologists which it could not otherwise have possessed. To all those 

 who wish to study the true structural relations of the four spiders, the 

 habits of which are recorded in the following pages, these details will prove 

 of the highest importance ; while those who are only interested in the 

 economy of these creatures can readily pass them over. For observers in 

 the field there is a very ready way of knowing these four spiders apart, as it 

 will be seen that w^hen they are somewhat alike the nests are diflerent 

 {Neiiiesia nuridionalis and N. Ekunora), and when the nests are alike 

 {Cteniza fvdiens and Neniaia cwiacntariu) the spiders are markedly dissimilar. 



