24 ' MR. F. O. PICKAKl) CAMUBIJ)GE ON THE [Jail. 18, 



not two spines on the inner side of the basal half. Inferior margin 

 of fang-groove with four teeth, superior with three. 



Vulva very simple, convex. See Plate III. fig. 9. 



An adult male and four adult females were taken by Mr. H. 

 A. Spencer at King William's Town, South Africa. Another 

 female was taken by the same collector at East London, South 

 Africa, while a single male was received from the collection of the 

 K.ev. O. Pickard Cambridge, taken at Natal, South Africa. In 

 general characters this species inclines to resemble 0. Icingsleyi and 

 C.occidentcdis,]:)^^ can easily be distinguished from these by the much 

 greater difference in size between the central posterior and central 

 anterior eyes, and also by the greater narrowjiess of the clypeus. 



Ctenus oarsoni, sp. n. (Plate III. figs. Act, b, 5 a-c.) 



d" . 31 mm. JJab. Mombasa, Victoria Nyanza, and Lake Tan- 

 ganyika, coll. Carson, &c. Type in coll. Brit. Mus. Nat. llist. 

 London. 



Total length 31 mm. Carap. 15x12. Anterior murgiu 5. 

 Legs : i. 70, ii. 60, iii. 50, iv. 66. Tib. + pat. i. 2—3—5. Tib.+ 

 pat. iii. 14-5. Tib. + pat. iv. 19-5. Prot. : i. 17; iii. 12; iv. 18. 

 Stern. 7 X 5-5. 



Colou7\ Carapace mahogany red-bro\An, clothed Avith fine silky 

 ochre-yellow pubescence. Lec/s the same as carapace, clothed 

 with very fine silky, close, ochre-yellow pubescence and longer 

 fringing ochre-yellow hairs, scarcely equal to the width of the 

 segments. Abdomen dull ochre-brown, clothed with short silky 

 ochre-yellow hairs, unicolorous. Stei'imm dark mahogany-brown. 

 Mandibles clothed on basal half with ochre-yellow hairs, apical half 

 less densely. 



c? . St7-ucture. Carapace longer than broad, narrowed abruptly 

 at point in a line crossing just behind posterior lateral eyes ; 

 horizontal above, slightly gibbous behind, obliquely inclined to 

 base. Eyes closely grouped, second row straight by antei-ior 

 margins ; centrals four times transverse diameter of laterals, less 

 than I a diameter apart, | a diameter from laterals ; posterior 

 laterals \ smaller than centrals, j a diameter from them. Ocular 

 quadrangle much broader than long : anteriors much smaller, 

 diameter a little over g of that of posteriors, | a diameter apart, 

 ^ a diameter from centrals. Clypeus equal to 1| diametsrs of 

 anterior centrals. Lower margin of fang-groove with four stout 

 short teeth, upper with three. Labium one half of maxillae, 

 scarcely longer than broad ; maxillae attenuate at base, dilate 

 towards apex, outer side emarginate, rounded on outer apical 

 margin, obliquely truncate on inner apical side. 



Legs 1, 4, 2, 3. Pemora spinous above. Patella of all four 

 pairs with one short spine on each side. Tib. i. and ii. with 2 — 2 — 

 2 — 2 — 2spines beneath,No. 4 pairslightly lateral,No.5 apical, 1 — 1 

 (or only one) lateral spines. 1 — 1 — 1 dorsal spines. Protarsi i. and 

 ii. with 2 — 2 — 2 spines beneath, No. 3 apical, and a single short 

 central apical spine beneath. Protarsi and tarsi i. and ii. entirely 



