158 Transactions of the South African Philosophical Society. 



5. Ariadna bilineata, n. sp. 



Specimens. — (a) 4 adult 2 2 (Nos. 3443, 3532, &c), several with 

 cocoons, from Signal Hill and the slopes of Devil's Peak (B. M. 

 Lightfoot, W. F. P.), and a number of others, apparently immature, 

 also from the Cape Peninsula. 



? 2 • Colour. — Carapace reddish-yellow to dark reddish-brown, 

 sometimes nearly black anteriorly, the margins finely blackened, the 

 surface hairy and usually finely veined with black, the posterior part 

 of the cephalic portion generally finely outlined in black. Chelicera 

 yellowish-red to black. Abdomen with a fine, pale yellowish line 

 running from end to end down middle of each lateral surface, the 

 dorsal surface violet-black, generally with several very fine, trans- 

 verse, arcuate, yellowish lines posteriorly, the ventral and lateral 

 surfaces (below the lines) either violet-black (except the pulmonary 

 opercula and a pale yellowish patch on each side posteriorly) or pale 

 yellowish, with a pair of posterior black patches below, a black patch 

 between the lungs and an anterior black area on each side. Legs 

 faintly or strongly infuscated, the 2 anterior pairs darker than the 

 posterior ones, the femora with 2 upper and 1 outer pale yellow 

 stripe, the outer stripe on fourth leg very short, basal ; patellae pale 

 yellowish, infuscated distally ; tibiae with 2 widely separated, superior, 

 yellowish stripes ; metatarsi and tarsi paler than the tibiae and 

 femora, the metatarsi nearly all blackened at apex, at least on inner 

 side. Sternum reddish-yellow, lightly infuscated, the lateral margins 

 and depressions generally much blackened. Labium darkened at 

 base. 



Carapace as long as the tibia and about f of the metatarsus of first 

 leg, narrowed in front, its width just behind the eyes only about \ of 

 the length of the first tibia, its surface sparsely hairy. Ocular area 

 rather narrow, the distance between the posterior lateral eyes and 

 the median eyes being less than the united width of the latter, the 

 hind margin of the posterior row forming a straight or slightly 

 recurved line. 



Pegs clothed with brown hairs, the hairs on anterior tibia neither 

 long nor very dense ; fourth femur slightly thicker than the first, the 

 first tibia not much thickened. Metatarsus I. a little shorter than 

 the tibia ; I. and II. with a single outer and inner row of stout 

 spines below ; III. with 2 inferior rows of spines, besides an outer 

 and an inner row of 1-2 spines each ; IV. with a slender apical and 

 sometimes a basal spine below, the apical tuft composed of 4-7 setae. 

 Tibia I. with an outer and an inner row of 6-9 stout spines each 

 below, in addition to an outer and an inner row of 3 (rarely 2) spines 



