36 PECKHAM. [Vol. 3. 



ward so that the cephalothorax is considerably wider below 

 than above. The highest point is at, or just behind, the dorsal 

 eyes. The quadrangle of the eyes is less than one-fourth wider 

 than long, is about equally wide in front and behind, and 

 occupies two-fifths of the cephalothorax. The four anterior 

 eyes are a little separated from each other, the space between 

 the middle eyes being narrower than that between the middle 

 and lateral, and form a straight row. The middle are twice as 

 large as the lateral. The second row is a little nearer the first 

 than the third row, and is narrower than the third, which is 

 itself plainly narrower than the cephalothorax at that place. 



Of this genus we have four species, three of which were 

 described by C. Koch, in Die Arachniden, XII F. These are 

 (Plexippus) mimicus which we make the type of Pardessus, 

 (Plexippus) seledus, and (Phiale) gratiosus. The fourth species, 

 sent to us from Trinidad, by Mr. Broadway, is still undescribed. 



PARDESSUS MIMICUS, C. K. 



Plate III, figs. 1-lb. 



9 . Length, 9 to 10. Length of cephalothorax, 4.5 ; width 

 of cephalothorax, 2.6. 

 Legs, 5 4312 ; first and second pairs a little the stout- 

 est. Third and fourth much the longest. 



The clypeus is a little more than one-fourth as high as the 

 anterior middle eyes. The falces are vertical, and only mod- 

 erately long and stout, with a small fang. At the extremity 

 are three small teeth, two on the upper and one on the under 

 edge, which are visible from the under side. The labium is short 

 and rounded. The maxillse are obliquely truncated. The 

 abdomen is oval, and rather slender and graceful in form. 



The cephalothorax is covered with yellowish red hairs, the 

 cephalic plate being darker than the rest. The abdomen is 

 bright orange red, with two large, black spots on the anterior 

 half and two wide transverse black bands behind. There is 

 sometimes another black band around the anterior end. The 



