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Annals of the Transvaal Museum 
then curving upwards a little but not or only slightly recurved, 
broad and strongly flattened throughout, distally with several short 
lobes or processes. In the upper jaw, the single series includes two 
anterior strong teeth, followed by a short interval, and then two or 
three teeth. 
23. Flagellum terminating in a short sharp strongly curved spur, directed 
outwards and upwards, and composed of two closely appressed pieces : on the 
outer edge of the shaft, near to the apex, is an obtuse lobe- like process, and on 
the inner edge, still nearer to the apex, is a curved filiform process minutely 
serrulated along its outer edge. 5 . cervina Purcell. 
24. Similar thereto, but flagellum terminating in a broadly ovate lobe, 
with rounded apex, and provided with a straight acute process extending 
outwards from the posterior upper part: the upper edges of the lobe and its 
process are continuouslv serrated. 5 . collinita Purcell. 
23. Shaft of flagellum broadening out distally and dividing into three 
divergent backwardly directed slender processes, the middle one of which is 
shortest and stoutest, being straight, indurated and sharply pointed at the 
tip, the other two being curved and comparatively weak, the shorter mesial 
one being finely serrulate above near its apex. 5 . alcicornis Kraepelin. 
Group II. 
Dentition of the upper jaw very dissimilar in the two sexes; in the 
female continuous, and closely resembling that of Group I; but in the 
adult male with a long toothless space in the middle of the single series 
(except in Junodi), thus separating the teeth into two groups of two 
teeth each, the teeth of the distal group varying much in size and 
occasionally with an additional small tooth anteriorly. Adult female 
with the first abdominal sternite more or less produced at the hind angles 
mesially into a pair of narrowed lobes (cp. PI. Ill, fig. 11). 
The species are all diurnal, and at once distinguished from the 
nocturnal species of group I by the strongly contrasting colours of the 
abdomen, the sides of which are white or yellow, whilst the posterior 
tergites are black or strongly infuscated, the anterior tergites being paler 
mesially but usually becoming infuscated laterally, thus presenting a 
dark lateral band on each side which gradually merges with the blackened 
area of the posterior tergites. The upper margin of the basal enlargement 
of the flagellum of the male is elevated into a sharp keel: the lower jaw 
usually has a very long fang, and on the outer side distally is a sharp 
keel, which is sometimes continued as a prominent granular crest towards 
the base of the jaw: feather bristles are poorly developed on the inner 
surface of the lower jaw, and are not very well developed on the upper 
jaw. Posterior legs usually with numerous long hairs which are some- 
times arranged in a distinct mane in adult males. 
A. Terminal fang of upper jaw without a long keel on its mesial 
side, but provided with a dorsal forwardly projecting tooth just in 
front of the anterior bend of the flagellum, or with an abbreviated 
