226 M. Vauthier on a new Species of Epeira. 



is the longest, the second pair next in point of length, the third 

 much shorter, and the fourth pair as long as the second. Abdo- 

 men reddish yellow, triangular, its anterior angle truncated, 

 slightly sinuated and attached to the thorax ; each of the sinuated 

 sides, has, at the posterior part, a small black spine, near which 

 is attached a large rough horn-like process, furnished with blackish 

 hairs, and curved inwards ; its colour is brick red at the base, 

 and blackish at the extremity ; the posterior margin of the abdo- 

 men is slightly curved outwards ; above this margin is a strong 

 fold, at the extremities of which, situated in a cavity, are two 

 black tubercular spots j on two eminences of the same fold, are 

 attached two brown spines longer than those of the lateral parts, 

 and extending beyond the margin. The abdomen is, besides, 

 marginate all round, concave, with a rounded eminence in the 

 middle : it has on the surface, twenty-three shining, black spots, 

 of nearly an oval form, with a projecting margin, and a small 

 raised tubercle in the centre. These spots are disposed as fol- 

 lows : four at the anterior part, three at each side, nine at the pos- 

 terior margin, and four on the eminence in the middle ; they 

 very probably may be the stigmata which admit the air in res- 

 piration. The under part of the abdomen is shaded with brown, 

 red and yellow, is plicate, and has a black projecting anus. 



Explanation of the Figures in Plate X. 



Fig. 1. The insect magnified to twice the natural size. 



Fig. 2. Parts of the mouth, viewed at the under side. A. mandi- 

 bles. B. maxillae (levres). C. labrum (menton). 



Fig. 3. One of the abdominal processes, very much magnified. 



Fig. 4. Mandibles, palpi, thorax, feet, and anterior part of the 

 abdomen, highly magnified, viewed at the upper side. 

 A. mandibles. B. palpi. C. tubercles which support 

 the eyes. D. legs. E. black spots of the abdomen. 



Fig. 5. Posterior part of the abdomen very much magnified, 

 viewed at the under side, shewing the fold which bears 

 the two spines, and the two black spots, situated in its 

 cavity. A. anus. 



