1904.] * NATURAL SCIENCES OF PHILADELPHIA. * 269 



Dimensions. c $ 



Cephalothorax, l.S 2-2.9 



Abdomen 2 2- .3.5 



Leg 1 5..5 6.3-10 



Leg II o.-t 5.5- 9.9 



Leg III 5 5.4- 9.2 



Leg IV, 7 8.8-13 



Color of Males (in alcohol). — Cephalothorax deep black in the eye 

 region and forehead, this black becoming brown more posteriorly; a 

 median yellow band arises at the dorsal groove and passes back (be- 

 coming gradually wider) to the posterior end of the thorax; on each 

 side is a broad siibmarginal yellow band; the extreme margin is black. 

 Sternum clear yellow, or suffused with black on its anterior half. 

 Abdomen above deep black or brown. In light individuals there is a 

 median yellow band, broadest anteriorly, extending the whole length 

 of the dorsum, bordered anteriorly by four }mirs of small black dots, 

 and posteriorly Ijanded by transverse lines of yellow wider than the 

 band itself. In dark individuals the dorsum is deep black, with only 

 a trace of the median band at the anterior end. Sides gray and the 

 venter yellow in one specimen ; in the others the venter is more or less 

 blackish with a black mark at the genital aperture, and a Inroad median 

 black bantl. Chelicera, maxilUe and labium deep black to yellowish. 

 Legs clear yellow without rings, with more or less black on the first 

 femora. Palpi deep Ijlack. 



Color of Females (in alcohol). — Cephalothorax with the ocular region 

 deep black and the forehead yellow. A median yellow band arises 

 narrowl}' between the third eyes, shortly behind enlarges to a diam- 

 eter somewhat less than the distance between these eyes, narrows again 

 in front of the dorsal groove, enlarges again ver}^ slightly around this 

 groove, and then passes back, becoming narrower, to the posterior end 

 of the thorax. Medio-posteriorly from each eye of the third row a short- 

 brown line obliquely incises the median band. The median band is 

 bordered on each side by a broader brown band transversed by radial 

 lines of black. On each side is a broad submarginal j^ellow band, 

 narrower than the contiguous brown band, which joins with its fellow 

 of the opposite side below the anterior e3'es. Sternum yellow like the 

 coxae, sometimes with indistinct darker marginal mai'kings. Abdomen 

 above quite variable, either (1) with a broad shining yellow median band 

 along its entire length, containing in its anterior half a narrower green- 

 ish-yellow band terminating in a point at the middle, the latter band 

 with four black spots on each margin; or (2) the greenish-yellow 



