70 
Annals of the Transvaal Museum 
2. The shaft of the flagellum is of more uniform thickness and does 
not taper gradually to a slender apex, the distal end being strongly 
compressed, blade-like, and slightly dilated: the shaft moreover is not 
curved throughout its length, the upper portion being directed back- 
wards in a straight line for a considerable distance. Lower jaw long, 
slender, strongly curved, with a small tooth behind the middle. 
H. reticulatus Purcell. 
3. Towards the apex of the flagellum, the shaft presents for a short 
distance a small membranous expansion along the lower side: this 
terminates quite abruptly near to the distal end which is drawn out to a 
fine point. The lower jaw has a fairly large tooth with a horizontal upper 
edge, the distal end of the tooth being nearer to the apex of the jaw than 
to its base. Upper jaw with two small teeth near to the point of origin of 
the flagellum. H. nigrolunatus Kraepelin. 
4. Similar to lanatus, but tibia of palp with short cylinder bristles 
over the whole extent of the upper surface, the cylinder bristles of the 
lower surface being short distally, but those near the base of the segment 
gradually become longer, exceeding twice the length of the distal bristles. 
(In lanatus the tibia of the palp, dorsally and ventrally, is said to carry 
long hairs, rather long bristles and between them some short isolated 
cylinder bristles.) H. infuscatus Kraepelin. 
Genus Chelypus Purcell. 
Chelypus barberi Purcell, 1901. Annals S. Af. Mus. n. p. 224, fig. 10. 
The type is a male from a locality in Bechuanaland about 100 miles south 
of the junction of the Moshowing with the Molopo Rivers. The Transvaal 
Museum has a specimen labelled Rietfontein, Gordonia, which seems referable 
to this species. In this specimen, the chelicerae are not densely covered with 
minute pointed spinules on the upper surface, but have short subspiniform 
setae and some very minute spinules. The cup-like basal enlargement of the 
flagellum narrows into a rounded solid head which fits closely into a hemi- 
spherical depression on the surface of the chelicera. 
Chelypus lennoxae Hewitt, 1912. Records Albany Mus. n. p. 312. 
The type came from Upington. 
This species is remarkable in its dark colouration, the hairs of the abdomen 
superiorly being brown or dark brown, and the sides quite deeply infuscated : 
the fourth femur is rather long when compared with the trochantin: the 
chelicera has comparatively coarse, black, pointed spinules on the outer 
portion of the upper surface and on the upper portion of the outer surface, 
whilst a prominent oblique patch of strong pointed spinules occurs on the 
mesial surface near to the base of the fang superiorly: the furrows of the 
stridulatory area are very long, and in general longitudinally arranged: a 
distinct ocular tubercle is not present, but the area on the mesial side of each 
eye is slightly raised: the abdominal tergites are well defined. 
Chelypus hirsti Hewitt [PL VIII, fig. 45 and Text-fig. 12], 1915. Annals Natal 
Mus. in. p. 323, figs. 8 and 9. 
The types were taken at Rietfontein in Gordonia. 
