1898.] BT iia. C. S. BETTOK l-S BUITISH EAST AFEICA. 519 



Family HeteropodidjE. 



Genus Heteeopoda Latr. 



Heteeopoda vekatoeia (Linn.). 



Loc. Changamwe. 



Introduced by human agency throughout the world, originally 

 from the Oriental region. 



Genus Spaeassijs Walck. 



Spaeassus bicoeniger, sp. n. (Plate XLI. fig. 9.) 



Colour of carapace, mandibles, sternum, coxsb, and maxillae a 

 uniform bright ochre-yellovv, the sternum rather paler than the 

 coxse and carapace ; legs of the same tint, but with the femora 

 rather thickly spotted below; tarsus and tibial spines of palp 

 black ; hairy clothing of legs and carapace, where present, of a 

 silvery white ; abdomen damaged, but distinctly spotted above, the 

 sides variegated with yellowish hairs. 



Carapace about equal to length of 4th tibia, very slightly longer 

 than wide, strongly convex ; posterior line of eyes straight, the 

 eyes subequal, the medians nearer together than either is to the 

 corresponding lateral ; ocular quadrangle longer than wide : 

 eyes of anterior line straight, larger than those of the posterior, 

 subequal in size and subequally spaced ; distance between the 

 mecUans less than a diameter, medians about their own diameter 

 from edge of clypeus. 



Legs 2, 1, 4, 3 ; patella and tibia of 1st longer than of 4th ; 

 protarsi of 1st, 2ud, and 3rd scopulate only in the distal third 

 of their length, 4th not scopulate ; patellae unspined, spines on 

 lower side of tibiae and protarsi 2, 2, on upperside of tibia 1, 

 on upperside of femora in the middle 2. 



Palp with tibia and patella subequal in length ; tibia much 

 thickened below at its distal end, armed externally with a long, 

 straightish, slightly clavate process, which considerably exceeds 

 the tibia in length and gives off near its base in front a thinner 

 curved pointed process nearly equal to the tibia in length ; tarsus 

 rather longer than patella and tibia, with a narrow stalk-like neck 

 and a posterior external angular expansion, its inner margin 

 evenly convex, gradually narrowed to the tip. 



Measurements in millimetres. — Total length 10 ; length of carapace 

 4-8, width 4-3 ; length of 1st leg 22, of 2nd 24, of 3rd 17-8, 

 of 4th 20. 



Loc. Ndi, Weiss Eoad. 



This peculiar species is sufficiently characterized by the structure 

 of its double tibial apophysis of the palp. 



