Regions of Lakes Nyasa and Tanganyika. 447 



Araneus pachanus, sp. n. (PI. XIII. fig. 9.) 



Colour. Carapace ferruginous, darker towards the margin ; 

 mandibles ochre-yellow, blackish distally ; palpi and legs 

 mostly ferruginous, and clothed, like the carapace, witli 

 whitish hairs ; patellar lightly fuscous distally, tibiee and pro- 

 tarsi with two indistinct fuscous bands, one distal, one median ; 

 tarsi distally fuscous, yellow at the base ; femora of posterior 

 leg infuscate ; abdomen yellowish brown above and below, 

 the lower side nearly uniformly coloured, ornamented only 

 with a pair of indistinct yellow spots a short distance in front 

 of the spinners; upperside with an indistinct pattern, con- 

 sisting in front of a longitudinal black patch shaped like an 

 arrow-head, with the point directed forwards; this is followed 

 by a pair of irregular black longitudinal bands, which con- 

 verge and meet posteriorly, leaving a paler lanceolate area 

 between them, and give off externally faint dark stripes which 

 extend on to the sides of the abdomen. Hairs on trunk and 

 limbs mostly yellowish white, those on upperside of abdo- 

 men black at base. Spines on limbs white, with black base 

 and apex. 



Carapace flattish longitudinally between the fovea and the 

 eyes, considerably longer than first tibia and longer than 

 protarsus and tarsus of fourth, a little shorter than patella 

 and tibia of fourth, and about equal to femur of first and 

 fourth ; ocular quadrangle much wider in front than behind, 

 posterior medians less than a diameter apart, anterior medians 

 larger and about a diameter and a half apart; eyes of anterior 

 line about straight, not recurved, distance between medians 

 about half the distance between median and lateral on each 

 side ; clypeus a little wider than anterior median eye. 



Fang-groove of mandible armed with 4 teeth in front, 

 3 behind. 



Legs moderately long, first more than three times as long 

 as carapace ; spiny. 



Abdomen heart-shaped, widely rounded in front, ovally 

 elongate behind, without shoulder-points. 



Vulva with long scape ; scape as wide at its distal end as 

 the basal portion, which posteriorly projects beneath it, 

 leaving only a narrow notch between. 



Measurements in millimetres. — Total length 26; length of 

 carapace 6*5, width 5; length of abdomen 10; length of 

 first leg 22-5, of fourth 19. 



Emin Pasha procured one specimen of this species at 

 Karagesi, and Mr. Scott Elliot a second on Mount Ruwen- 



31* 



