506 MR. R. I. piK'ock; ox tue ara.ch.vids collected [J line 21, 



base, with a few cusps; labium with a row of four cusps. Sternal 

 sir/ilia marginal. 



Measurements in millimetres. — Total length of trunk 22, carapace 

 lO'S; width of carapace 9-5; length of palpus IG'5, of Ist leg 32, 

 2nd leg 30-5, 3rd leg 28, 4th leg 37, patella and tibia of 1st 12, 

 of 4th 10-5. 



The species described from Moschi as Ltiommata le.pida by 

 Gerstiicker (Von der Decken's Reisen in Ost-Afrika, iii. 2, p. 485) 

 was based upon a male example which, as suggested by Simon, 

 perhaps belongs to the genus Pisenor ; in any case it is certainly 

 different from the male here identified as Plsenorodes hdhneli. In 

 the first place, it is very much smaller, the body and mandibles 

 measuring only 12-5 mm. in length, and there is not a word in 

 the description to credit the belief that the tarsus of the palp 

 and the tibia of the 1st leg are constructed as in the species I have 

 here described. 



Family Ctexiztd.e. 



Genus Ctutafciiexius Thorell. 



Ctetauchenius flaviceps, sp. n. 



Carapace with its head-region clear reddish yellow, with a fine 

 median fuscous line studded with a series of setiferous pores ; the 

 head bordered by a broad brown band on each side, which passes 

 back to the fovea ; sides of the thoracic portion paler than the 

 median portion ; mandibles, palpi, and anterior two pairs of legs 

 dark brown ; 4th leg a little paler ; abdomen a uniform greyish 

 brown; sternum and coxae yellowish. 



Carapace as long as patella and tibia of 4th leg, and as patella, 

 tibia, and half the protarsus of the 1st, its width equal to protarsus 

 and tarsus of 4th leg ; length from fovea to anterior border equal 

 to tibia of 4th. Ocular area more than twice as broad as long ; the 

 eyes of the posterior line wider than those of anterior, of which the 

 lateral are close to the edge of the clypeus. Eyes of anterior line 

 procurved ; a line touching the anterior border of the medians would 

 pass behind the centres of the laterals ; space between anterior 

 medians equal to about half their diameter ; laterals larger than 

 medians and larger than posterior laterals, which are quite close 

 to the posterior medians. 



liastellwn consisting of strong spines overhanging the base of the 

 fang ; internally some of these fangs are longer and arranged more 

 thickly, externally they are shorter and form a single series ; lower 

 margin of mandible with an inner series of about nine teeth, the 

 external row consisting of a series of granules ; fang longish. 

 Labium and maxilla unarmed, bristly. 



Legs longish and slender, except those of the 3rd pair, which are 

 shorter and have the femur and patella thick : 1st leg with a single 

 median apical spine on the tibia, and two spiniform setae behind it, 

 and 7 inferior spines on the protarsus amongst the scopular hairs, 

 arranged approximately 2, 2, 3, the latter being at the apex ; 2nd 



