A NEW JUMPING SPIDER. 



BY JOHN L. CURTIS. 



The subject of the following description is a spider which has been 

 carefully studied by the writer for some time past. It was recently 

 submitted to Prof. G. W. Peckham, who has pronounced it a new 

 species of the genus Dendryphantes. Accordingly, I have thought 

 it timely to publish a short description of the spider, together with 

 such notes on habits, etc., as I have collected. The following will, I 

 think, sufficiently identify it. 



Dendryphantes .eneolus. 



Total length, 5.4 mm. ; width of abdomen, 2.2 mm. 



Cephalothorax, length, 2.4 mm.; width, 2.2; height, 1.8 mm. 



Legs, 8,3 mm., 5 mm, 4.6 mm., 6.2 mm. Patella and tibia of the 

 first, 2.7 mm.; patella and tibia of 2d, 1.6 mm.; patella and tibia of 3d, 

 1.6 mm.; patella and tibia of the 4th, 2 mm.; metatarsus and tarsus of 

 the 4th, 1.6 mm. 



Total length, 6.7 mm.; width ot abdomen, 2.6 mm. 



Cephalothorax length, 2.6 mm.; width, 2 mm.; height, 1.6 mm. 



Legs, 6.2 mm., 4.9 mm., 4.4 mm., 5.9 mm. Patella and tibia of 

 ist, 2 mm. ; patella and tibia of 2d, 1.6 mm. ; patella and tibia of 3d, 

 1.2 mm; patella and tibia of 4th, 1.8 mm.: metatarsus and tarsus of 

 4th, 1.7 mm. 



cfi^ Cephalothorax moderately high, convex, a very little dilated 

 behind dorsal eyes with sides nearly vertical in front and rounded 

 behind. Ephalic part level, thoracic part falling rather abruptly. 

 Quadrangle of eyes occupying one-third of cephalothorax, one-half 

 wider than long, same width before and behind. First row of eyes bent, 

 inclined slightly downward, middle eyes sub-touching, lateral about 

 one-third as large as middle eyes and separated from them by one- 

 fourth of their own diameter. Eyes of second row midway between 

 dorsal and lateral eyes d", a little farther from dorsal than from lateral 

 eyes p. Dorsal eyes a little smaller than lateral eyes, farther from 

 each other than from lateral borders, forming a row as wide as the 

 cephalothorax at that place. Clypeus perhaps inclined a little back- 

 wards, one-third as high as middle eyes in d, four-fifths as high as 

 middle eyes in P. Fakes wider than the two middle eyes, reaching 

 to inner margins of lateral eyes, once and a half as long as face SP, 

 divergent, inclined slightly forward. Fang strong cf, vertical, paral- 



