PecJcliam — Spiders of the Family Attidae, 299 



In Phidippus the cephalothorax is wider and shorter; the 

 quadrangle of the eyes is plainly wider behind than in front; 

 the second row of eves is twice as far from the third row as it is 

 from the first ; the thoracic part is not so steeply inclined. In 

 Joins the quadrangle of the eyes is only one-fifth wider than 

 long. In Dynamius the quadrangle of the eyes is only one- 

 fourth wider than long, and the legs are nearly equal in length, 

 the third and fourth, however, heing* longer than the first and 

 second. In Dendry pliant es the shape of the cephalothorax is 

 different, being lower and flatter, without the distinctly raised 

 cephalic plate. In Servaea the cephalothorax is not high as it 

 is in Philaeus, and its upper surface is flattened. Simaetha 

 has the lateral eyes of the first row widely separated from the 

 m.iddle eyes. In Tliyene the cephalothorax is more rounded 

 and has its highest point well behind the dorsal eyes. 



Our collection has the following species belonging to the 

 genus Philaeus: clirysops Poda^ Dalmatia; clirysis Wlk., Guate- 

 mala; hicolor Wlk., France; sanguinolatus Wlk., Dalmatia; 

 fartilis Peckham, Mexico ; and mexicanus Peckham, Mexico. 

 PI. oriclialceus C. K., which we formerly put into Phidippus, 

 and Phid. fraternus Banks, are synonyms of Philaeus chrysis, 

 Phid. disjunctus Banks is identical w^ith P. fartilis. 



Zenodorus Peckham, 1885. 

 PI. XXV, fiffs. 1-le. 



In 1881 Thorell formed the genus Ephippus for d'Urvillei 

 Walck. The name vras preoccupied, and Zenodorus was sub- 

 stituted in 1885. It is characterized by the shape of the ceph- 

 alothorax, which is very wide in front and narrow behind, and 

 by the large eyes of the first row. 



The cephalothorax is wide in front, and is high at the third 

 row of eyes, from which it slants steeply in both directions. 

 All of these points are exaggerated in the male. The quad- 

 rangle of the eyes is one-fourth wider than long, is wider in 

 front than behind, and occupies one-third of the cephalothorax. 

 The anterior eyes are in a plainly curved row, and are all large, 

 the lateral being three-fourths as large as the middle. The 



