Biological Papers. 123 



side. The legs are pale yellow to whitish. The femora, patellae 

 and tibice of all four pairs are marked in front with a longitudinal 

 stripe of black, which becomes neatly obliterated on the metatarsi 

 and tai'si. The corresponding joints of the legs of the third and 

 fourth pairs are similarly marked on the hind border also. The 

 males are somewhat smaller than the females, the abdomen being 

 considerably narrower than the cephalothorax. The legs are more 

 hairy in appearance and the spines less conspicuous than in the fe- 

 male. The color markings are about the same in the two sexes. 

 This species is not uncommon about Manhattan, Kan., in mid- 

 summer. Mature males and females were taken in this locality on 

 August 17. 



Family Clubionid^. 

 Castaneira crocata Hentz. 



Herpyllus crocatus Hentz. Jour. Bost. Soc. Nat. Hist., V, 1845, p. 457. 



Representatives of this species from Wallace, August 20, and from 



Manhattan, July 29. From its general appearance and movements 



this spider might, at first sight, be easily mistaken for a velvet ant 



( mutillid ) . 



Trachelas tranquilla Hentz. 



Clubiona tranquilla Hentz. Jour. Bost. Soc. Nat. Hist., V, 1845, p. 450. 

 One female taken in collecting under stones at Lawrence October 8. 



Family Drassid^. 

 Zelotes decepta Banks. 



Prosthesima decepta Banks. Proc. Acad. Nat. Sci. Phila., 1900, p. 531. 

 A single male specimen from Manhattan, May 5. 



Zelotes rufula Banks. 



Prosthesima rufula Banks. Proc. Acad. Nat. Sci. Phila., 1892, p. 17. 

 A single female specimen from Manhattan, May 5. 

 Melanophora atra Hentz. 



Herpyllus ater Hentz. Jour. Bost. Soc. Nat. Hist., V, 1845, p. 455. 

 Two females from Manhattan, May 1. 

 Gnaphosa sericata Koch. 



Herpyllus bicolor Hentz. Jour. Bost. Soc. Nat. Hist. , V, 1845, p. 456. 

 One female from Manhattan, July 27. 



, Family Salticid^. 

 Phidippus plus, sp. nov. (figs. 1, 2, 7). 



A medium-sized species, rather light in color. One male taken at 

 Manhattan in October and two females in July. 



Measurements. —Length of female, 9-10 mm. Length of abdomen, 

 5 mm; width of abdomen, 3 mm. Width of cephalothorax about the 

 same as that of abdomen. The measurements of the male are 

 very approximately the same, except that the abdomen is slightly 

 narrower. 



Legs.— Relative length, female, 4, 1, 2, 3; male, 1, 4, 2, 3. The legs 

 of the first pair are considerably stouter than any of the others. 

 First and second metatarsi set beneath with six stout spines in two 

 rows. Tarsi of same legs with four spines. A few spines, less 

 regularly placed, on the other legs also. 



