158 Journal New York Entomological Society, ["^'o'- xxviii. 



quently in France, and possibly representing a new species. In the 

 same paper Gomte de Dalmas puts forward the opinion that the spider , 

 which I identified as O. saltabimda is in reaUty the male of O. salti- 

 tans. That this male is not O. salfabtinda is quite evident from the 

 structure of the palpus which Dalmas figures on page 227 (figures 

 24 and 25). Whether it is the male of O. salfifaiis of which Banks 

 has described only the female, remains an open question. Since how- 

 ever I omitted to give a description and merely gave two figures, I 

 thought it advisable to give now a detailed description of my speci- 

 men and measurements and drawings of the most important parts. To 

 accomplish this I have cut off the legs and palpi, preserved them as 

 microscopical slides, made the drawings with the aid of an Abbe 

 drawing apparatus and the measurements with an ocular micrometer. 

 For the convenience of the reader I reproduce here first the descrip- 

 tion of the female given by Banks, with the correction as to its size, 

 given by Dalmas (in Banks's description a decimal point is omitted 

 by mistake). 



Orchestina saltitans Banks, female. "Length i.i mm. Cephalothorax 

 whitish, with a black marginal line and a black spot around eyes ; mandibles 

 pale; legs and palpi yellowish; sternum whitish; abdomen purplish above, quite 

 dark near tip, center pale, spinnerets white. Cephalothorax quite broad, yet 

 plainly longer than broad, and broadest a little before the middle; highest 

 behind the middle and sloping to the narrow clypeus ; no dorsal groove nor 

 radial furrows; three rows of curved hairs above; eyes large, subequal, all 

 close together. Mandibles quite long, vertical ; lip quadrangular, broader than 

 long; sternum triangular, longer than broad, emarginate in front, tapering 

 behind and prolonged between the posterior coxa. Legs long and slender, 

 fourth pair as long as first, third pair much the shortest, quite thickly clothed 

 with hairs, two prominent claws; posterior femora greatly thickened, fully 

 twice as broad as femur I, and not much over four times as long as broad. 

 Abdomen nearly globose, but a little longer than high, quite thickly clothed with 

 stiff hairs ; spinnerets all close together ; region of epigynum slightly swollen, 

 a transverse furrow, beneath which is a pale area crossed by a yellow line." 



One female from Sea-Cliff, Long Island, New York; taken in the 

 house. When touched by a pencil, leaped backwards three centi- 

 meters. 



Orchestina saltitans Banks, male. (Plate IX.) O. saltabimda Petrunke- 

 vitch, 1910, nee O. salfabunda Simon, 1892, nee O. saltitans Emerson, 1909. 

 Length 1.05 mm. Cephalothorax 0.53 mm. long, 0.44 broad between second 



