1898,] BY ME. C. S. BETTON IK BRITISH EAST AFRICA. 513 



by a transverse black stripe ; the areas between these bands rusty 

 red, the whole of the posterior third of the upper surface also 

 rusty red ; sides and lower surface deep black, marked with small 

 v^-hite spots and furnished with a pair of wiiite interjially and ex- 

 ternally digitate stripes, passing from the epigastric fold to a point 

 on each side of the red mamillje ; area between the mamillae and 

 the apex of the abdomen deep black. 



Carapace heart-shaped, broad, considerably broader than long, 

 its length equal to tibia of 2nd leg, longer than tibia of 4th and 

 than patella and tibia of 3rd, its width equal to length of -ith 

 protarsus. 



Legs not plumose, without spiny band on the posterior femora. 

 Abdomen truncate in front, with distinct shoulder- points, oval 

 behind, with evenly convex margins converging to a point, in no 

 sense dilated behind, with borders not lobate, about one-fourth 

 longer than wide. Vulva consisting of a smooth upstanding 

 posteriorly narrowed tubercle, the posterior border of which is 

 mesially grooved and behind forms a wide septum between the 

 normal arched spaces. 



Measurements in millimetres. — Total length 14 ; length of cara- 

 pace 5, width 6; length of abdomen 10, width 7-5; length of 1st 

 leg 23, of 2nd 23, of'Srd 15, of 4th 21. 

 Loc. Samburu. A single adult feinale. 



In the form of the abdomen this species approaches many of the 

 Oriental species of the genus Argiope (e. g. aitherea Walck.), but 

 differs from all with which I am acquainted in the pattern of the 

 abdomen &c. 



Genus AEevEOEPEiRA Emerton. 

 Argyroepeira ungitlata (Karsch). 



Meta ungulata, Karsch, Zeitschr. gesammt. Naturwiss. lii. p. 834 

 (1879). 

 Loc. Taru. 



This species, recorded originally from the Loango coast, is 

 widely distributed throughout tropical Africa. 



? Genus Salassina Simon. 

 Salassina FORMOSA (Karsch). 



Cyclosa formosa, Karsch, Zeitschr. gesammt. Naturwiss. lii. 

 p. 835 (1879). 



Log. Samburu and Taru. 



Recorded from the Loango coast by Karsch. The British 

 Museum also has examples from the Camaroons {H. H. Jolinsion). 



Genus Poltys C. Koch. 



PoLTTS coRTicosus, sp. u. (Plate XLII. figs. 12, 12 a.) 



Colour. Thoracic region of carapace deep reddish brown, cephalic 

 yellowish white ; mandibles nearly black ; sternum, coxge, and pclpi 



