106 PEGKHAM. [Vol.2, 



and it also differs from Menemerus in general shape, being 

 flatter and longer, both in cephalothorax and abdomen. From 

 above it looks like Menemerus, but from the side it looks more 

 like Marptusa. It is not so heavy as Breda. 



MENEMERUS SIMON. 

 Plate X., Fig. 5—56. 



Spiders of medium size. 



The cephalothorax is moderately high, is slightly convex, 

 and is two-thirds as wide as long. It is widest behind the 

 dorsal eyes, growing sensibly narrower from this point to the 

 front. 



The quadrangle of the eyes is one-third wider than long ; 

 it occupies two-fifths of the length of the cephalothorax and is 

 equally wide in front and behind, or wider behind. The 

 thoracic part begins to slant just behind the dorsal eyes. 



The first row of eyes is straight. The middle eyes are 

 sub-touching, the lateral a little separated. The middle are 

 less than twice as large as the lateral eyes. The second row 

 is usually a little nearer the third than the first row. The 

 third row is a little narrower than the cephalothorax at that 

 place, the eyes being about as far from each other as from the 

 lateral borders. 



Menemerus is most closely related to Marptusa, but the 

 spiders are usually smaller, the upper surface of the cephalo- 

 thorax is not so flat, the cephalic part being plainly inclined 

 forward ; there is a more decided dilatation behind the dorsal 

 eyes ; the cephalic part is relatively longer (two-fifths instead of 

 about one-third of the cephalothorax), and the dorsal eyes are 

 placed on the sides of the head, not on the upper surface. 



The relations of Menemerus to Icius and Epiblemum are 

 given under those genera. It is not so low and flat as Balma- 

 ceda. The cephalothorax is not so flat as in Breda, and does 

 not widen out so much, the second row of eyes being about as 

 wide as the cephalothorax at that place, while in Breda it is 

 much narrower. 



