Antals of the Transvaal Museum. 
157 
two-thirds covered with very fine spinules. Upper finger curved at the 
apex, the most distal tooth quite small and obtuse, the other four of the 
single series large, the first two being most prominent and the third least 
conspicuous : lower finger with two large teeth and a small one between 
them : distal tooth much nearer the apex of the fang in the upper than in 
the lower finger. 
Flagellum , a transparent membrane with infolded edges which meet 
to form a funnel in the basal third, the whole structure elongated and 
pearshaped, the basal part narrowest but not narrowed i to a stalk, rotatably 
attached at its' anterior end to the inner surface of the upper finger at a 
point just above the commencement of the double series of teeth. Rotated 
forwards, the apex of the flagellum just reaches the tip of the upper 
finger. The distal portion is densely covered with short setae. Outer 
wall of flagellum with no thickened axis. 
Total length , 12 mm. 
Remarks. This seems to be a very distinct species. It is perhaps 
most nearly allied to B. unguicornis Pure. (Ann. S. Afr. Mus. Yol. II, 
p. 214, fig. 3) from Dunbrody, but is distinguished therefrom in the 
dentition and in the absence of a longitudinal thickened rib on the 
flagellum. B. crepidulifera, Pure. (1. c. p. 215, fig. 4) from Worcester Div., 
Text fig. 20. Blokm tricolor , sp. nov. Showing dentition and flagellum of (No. 27). 
and B. clunigera , Krpln. (Jena Denkschr. XIII, p. 275, fig. 7) from Little 
Namaqualand, are also related thereto, but in these species the flagellum 
has a narrow stalk. 
A $ specimen, which, judging from the colour, seems to be closely 
related to tricolor and may prove to be identical therewith, was described 
by Prof. Kraepelin from Khakea in the Kalahari under the name of B loss la 
ohscara (Jena. Denkschr. XIII, p. 278). 
B. falcifera , Krpln. 
Dunks, d. med-nat. Resells. Jena XIII, p. 277, fig. 8. 
Two (J(J (24, 25) were taken at Quibis. The flagellum is almost 
precisely like that figured by Prof. Kraepelin but the dentition differs 
slightly. In these specimens there is no accessory tooth on the large 
distal tooth of the lower jaw, as figured in falcifera , though there is a 
raised inner lamina arising from the inner surface of the jaw alongside 
the posterior edge of the distal tooth. In the upper jaw the terminal 
fang is not so long as in the specimen figured by Kraepelin. 
Nos. 22 a young example, and 23 a damaged $, both from Quibis, are 
no doubt referable to this species. The dentition of No. 23 is remarkable 
for the bluntness of all the teeth, especially those of the lower jaw. 
