590 PROCEEDINGS OF THE ACADEMY OF [AugUSt, 



D. tenehrosiis H. has a much broader epigynuiii and a broad sep- 

 tum, which does not, however, cover the cavity." I do not 

 understand how we may feel confident of ever identifying tene- 

 brosiis, and Keyserh'ng's figure of the epigynum of scapularis is 

 quite different from mine of idonem. 



Family OXYOPID.E. 



Characters of the Family. — The same characters as in the Lyco- 

 sidce, except that the eyes are arranged in three rows or four rows, 

 2. 2. 4., or 2. 2. 2. 2. The eves of the first row are never 



(Jenus OXYOPES Latr. 



34. Oxyopes salticus Hentz. (PI. XXX, fig. 52.) 



Oxyopes salticus Ilentz, 1841. 

 Oxyopes grticilis Keyserling, 1870. 

 Oxyopes salticus Hentz, Marx, 1889. 

 Oxyopes astutus Hentz, Banks, 1891. 



(2 mature ?9 from Philadelphia, Pa., author's collection.) 



Eyes. — Eyes of the first row smallest, more than their diameter 

 apart, much nearer the second row than to the edge of the fore- 

 head, removed less than their diameter from the second row. Eyes 

 of second row largest, separated 1^ times their diameter. Third 

 row broadest, its eyes separated by less than their diameter from 

 the second row. Fourth row slightly broader than the second, 

 its eyes about double their diameter apart. The eyes of the 

 second, third and fourth rows on black tubercles. 



Form. — Cephalothorax broad and short but high, highest at the 

 middle, in front more than one-half its greatest transverse diame- 

 ter. Length of the chelicera not quite the height of the head in 

 front. Sternum longer than broad. Superior and inferior spin- 

 nerets of equal length. Legs slender with very long spines. 



Dimensions. — Length of cephalothorax, 2.1) mm. 



Length of abdomen, 3 mm. 



Length of first leg, 10.4 mm. 



Ijenglh of second leg, 9.5 mm. 



Length of third leg, 9.7 mm. 



Ijcngth of fourth leg, 9 mm. 



Color in Alcohol. — Cephalothorax above light yellow, two 

 blackish-brown stripes arise at the posterior eyes and pass caudad 

 and unite at the very indistinct median groove, and a pair of 



