518 MB. E. I. POCOCK OX THE ARACHNIDS COLLECTED [June 21, 



Jb'amily Pisaurid^, 

 Genus Tetragos^ophthalma Karsch, 

 TETRAGoyoPHTKALMA STUHLMANXi Bcisenb. & Lenz. 



Tetra(jonophthaliiia stuhlinanni, Bdsenb. & Lenz, Jahrb. Hamb. 

 Anst. xii. p. 37, pi. ii. fig. 19. 



Loc. Taru and Samburu. 



Two male examples belonging to this or to a nearly allied 

 species. 



Genus Thalassius Simon. 



Thalassius 5i.\RGARiTATirs, sp. n. (Plate XLI. fig. 8.) 



Colour. Carapace a dark mahogany-brown, with a broad, 

 completely marginal yellowish-white band, which in front runs 

 up to a point on a level with the anterior median eyes : abdomen 

 a rich olive-brown above, ornamented on each side with a broad 

 yellow lateral stripe, geniculate at its posterior end where it 

 embraces the abruptly narrowed posterior termination of the 

 dark coloured field of the upper surface ; four yellowish-white 

 spots on the upper (inner) margin of each stripe, the posterior 

 spot the largest and situated just in front of the geniculation 

 of the lateral band ; lateral surface below the band greyish white 

 in front : legs and lower surface a tolerably uniform j^ellowish 

 or greyish brown. 



Carapace a little shorter than tibia 1, and about as long as 

 protarsus 1, its width a little shorter than tibia 3 : ocular quad- 

 I'angle a little longer than wide, pai'allel-sided, the eyes composing 

 it subequal ; clypeus equal to about once and a half times the 

 length of the quadrangle ; anterior lateral eye nearer to the 

 anterior median than to the posterior lateral. 



Leys 4, 1 and 2, 3 ; patella and tibia of 1st distinctly shorter 

 than of 4th, scarcely exceeding those of 3rd. 



Abdomen truncate in front, pointed behind, broadest just behind 

 the middle. 



Jleasurements in millimetres. — Total length 21 ; length of cara- 

 pace 9, width 8 ; length of 1st leg 33, of 2nd 34, of 3rd 32-5, of 

 4th 3S-0 ; patella and tibia of 1st 12, of 4th 13-5. 



Loc. Samburu and Taru. 



Differing from the rest of the African species with which I am 

 acquainted in the pattei'n of the abdomen and the marginal white 

 thoracic band. 



Family C t £ ^' i d .i. 



Genus Ctentjs Walck. 



Ctexus CAEsoNi F. Cambr. 



Ctenns carsoni., F. Cambr. Proc. Zool. Soc. 189S, p. 24, pi. iii. 

 figs. 4, 5. 



Loc. Taru and Mgana. 



Apparently widely distributed in East Africa. 



