20. Araneae. 23 1 
Synopsis of the South African species (adult ?9) of Ariadna. 
a. Metatarsi I and II with 2 — 3 rows of spines on each side. Head very broad in front, its width behind 
the ocular area almost equalling the length of the first tibia. Chelicera with the apical tooth of inferior 
margin of inner surface strong and well-developed and as large as the 3 strong teeth of superior margin. 
Cape Peninsula , A. dentigera Purc. 
b. Metatarsi I and II with only 1 row of spines on each side below (sometimes with 1 — 2 superior spines 
in addition). Head narrowed in front, its width just behind the eyes rarely as much as 5 / 6 , generally */ 6 
or less of the length of the first tibia. Chelicera with the inferior tooth sinall or obsolete, rarely as large 
as the superior tooth. 
a 1 . Cephalothorax as long as the tibia and l / 3 — 1 / i of the metatarsus of first leg. Little Namaqualand 
A. hottentotta n. sp. 
b 1 . Cephalothorax distinctly longer than the tibia and i / 2 the metatarsus of first leg. 
a 2 . Metatarsus of first leg subequal to the tibia. 
a 3 . Tibia I with 5 — 8 spines above the inferior row on each side. Anterior patella not spined. 
Caledon and Namaqualand Divs. (Cape Colony) A. lightfooti Purc. 
b 3 . Tibia I with 3—4 spines on each side above the inferior row. Anterior patella spined. 
a 4 . Width of both median eyes together much greater than their distance from posterior lateral 
eyes. Little Namaqualand A. jubata Purc. 
b 1 . Width of both median eyes together subequal to their distance from posterior lateral eyes. 
Kentani District A. Icolbei Purc. 
b 2 . Metatarsus of first leg distinctly shorter than the tibia. 
a 5 . Metatarsus IV with the apical comb generally rudimentary and reduced to 2 spines, rarely 
composed of 3 setae. Great Namaqualand A. insularis n. sp. 
b 5 . Metatarsus IV with well-developed apical comb. 
a 6 . Legs short, the length of the first metatarsus being subequal to the width of the head just 
behind the eyes, and the fourth femur only about 2 l / 2 times as long above as high. 
Colour yellow. Hanover A. scabripes Purc. 
b' ! . Legs longer. 
a 7 . Tibia I with 5 — 6 superior spines on outerside. 
a 8 . Patella I spined internally. Hanover and Port Elizabeth . . A. karrooka Purc. 
b 8 . Patella I not spined. Hereroland A. pulchripes n. sp. 
b 7 . Tibia I with only 3—4 superior spines on each side. Patella not spined internally. 
a 9 . Patella I not spined at all. 
a 10 . Metatarsus IV with 1—2 spines below. Tibia IV unspined. 
a 11 . Carapace as long as the tibia and 2 / 3 or less of the metatarsus of first leg. 
a 12 . Cephalothorax as long as the tibia and 2 / 3 of the metatarsus of first 
leg, its width just behind the eyes about 3 / 4 of the length of the first 
tibia. Cape, Caledon, Stellenbosch, Paarl and Malmesbury Divs. 
A. bilineata Purc. 
b 1 -. Cephalothorax less than the tibia and 2 / 3 of the metatarsus of first le«: 
in length, its width behind the eyes only 2 /s of the length of the first 
tibia. Bechuanaland A. similis n. sp. 
