32 PECKHAM. [Vol. 3. 



the lateral. The clypeus is about one-third as high as the 

 middle eyes. The falces are moderately long and stout, and 

 are vertical. They are wider at the end than at the inser- 

 tion. The lip is as wide as long. The palpus has the tarsus 

 as long as the tibia and patella together. 



The cephalothorax and the first pair of legs are bright 

 reddish brown. The abdomen, the palpi and the other legs are 

 pale yellow. The cephalothorax has the eyes on black spots, 

 and seems to have been covered, on the cephalic part at least, 

 with yellowish white, slightly iridescent hairs. On the cepha- 

 lic plate, about in a line with the second row of eyes, are tM'O 

 tufts of dark hairs, not always present. The abdomen has 

 sometimes two and sometimes four dark spots on the posterior 

 half. In one of our specimens it is covered with short, green- 

 ish yellow, iridescent hairs. 



We have three males from Panama, sent to us by Count 

 Keyserling. 



PHIDIPPUS (c. KOCH). 



Plate II, figs. 4-4b. 



Spiders above medium size, sometimes very large. 



The cephalothorax is from moderately high to high ; it is 

 massive, and convex above. The sides are usually widely 

 rounded out, especially in the male, so that it is wide in propor- 

 tion to its length. The widest point is behind the dorsal eyes. 

 The cephalic plate is inclined forward. The thoracic part falls 

 from the dorsal eyes at first gradually, and then more steeply. 

 The quadrangle of the eyes is from one-third to two-thirds wider 

 than long ; it is much wider behind than in front, and occupies 

 about two-fifths of the cephalothorax. The anterior eyes usual- 

 ly form a curved row, the middle being less than twice as large 

 as the lateral and a little separated from each other, while the 

 lateral are separated from them by from one-third to two-thirds 

 of their own diameter. The second row is about twice as far 

 from the third as from the first row. The dorsal eyes are as 

 large as the lateral and form a row which is narrower than the 



