318 PROCEEDINGS OF THE ACADEMY OF [March, 



Eyes ( $ ). — First row broader than the second, its lateral eyes 

 about their diameter from the second row, nearly straight, the middle 

 eyes being only slightly lower than the lateral. Eyes of the second row 

 almost their diameter apart. Third row broadest, its eyes almost as 

 large as those of the second row and placed upon tubercles. Quadri- 

 lateral of the middle eyes about as broad as long. 



Form ( 9 ). — Cephalothorax in front truncated straight and not quite 

 one-half its greatest transverse diameter, highest behind the middle, the 

 cephalic portion demarcated from the thoracic, its greatest transverse 

 diameter equalling the distance from the posterior eyes to its posterior 

 end, clypeus high and slightly inclined. Chelicera with 4 ventral and 

 3 dorsal teeth. Labium slightly longer than broad, shghtly rounded 

 apically, not one-half the length of the maxillae. Sternum rounded. 

 Legs slender, IV, II, I, III, IV longer than I by not quite the length of 

 its terminal joint. Length of leg IV to cephalothorax as 4.1 : 1, 

 Femur IV with a tuft of thickened hairs posteriorly near its dis- 

 tal end. 



Color in Alcohol ( 9 ). — The abdominal dorsum in all the specimens 

 shows anteriorly a more or less distinct median yellow line ending in a 

 point in front of the middle, and (generally less distinctly) a short 

 oblique yellow line at each side of its anterior end; on the posterior 

 half are 3 pairs of small white spots, connected transversely by as many 

 black lines which are not of the shape of a W, but slightly curved with 

 the concavity directed caudad; each of these white spots is surrounded 

 by black, and only the 3 pairs on the posterior half of the dorsum are 

 always distinct, but anterior to them are 1-3 pairs which are usually 

 very indistinct (represented usually by small obscure black spots with- 

 out white centers). 



Characters of the c?. — An adult dried specimen of one of the original 

 males, described byEmerton as the male of tenebrosus,wsiS kindly loaned 

 to me by Mr. Emerton. The eyes are as in the $ , the first row almost 

 straight. The legs are in order I, II, IV, III. Femur IV has on its 

 posterior border near the distal end a prominent bunch of long thick- 

 ened hairs or short spines, which are much more prominent than in the 

 female. The palpal tibia has on its outer surface a long curved tooth, 

 and is on its ventro-distal border prolonged into a long toothed pro- 

 cess ; the palpus is longer than the cephalothorax. This being a dried 

 specimen it is difficult to compare it with the alcoholic specimens of 

 the females ; but the color of the legs is the same, and also the general 

 abdominal pattern (the 3 pairs of white spots are very distinct, and also 

 the slightly curved transversed blackish lines connecting them); the 



