150 
awkwardness of gait so noticeable in these Antelopes when walking upon — 
firm resisting ground. 
Up to the present time three species referable to this genus have been 
described, namely, L. spekii from E. Africa, L. gratus from Tropical West 
Africa, and LZ. selousi from the valley of the Zambesi. Unfortunately there 
are not at present available materials from the different parts of the area over 
which the genus ranges, sufficient to enable us to determine satisfactorily the 
exact value to be assigned to these three forms. Consequently, although 
the evidence, so far as it goes, tends to show that the characters upon which 
they have been based may ultimately prove to have merely a subspecific 
importance, we prefer, for the time being, to allow them to take the rank 
that was originally assigned to them by their respective describers, and to 
arrange them as three species. 
Range of the Genus. Congo Valley and Lake-districts of Southern and 
Eastern Africa. 
The three species may be shortly distinguished as follows :— 
a. Size smaller; height at withers about 36 inches: sexes dissimilar; male 
blackish, female rufous . . . - . « |. 127. 1, spel 
6. Size larger; height at withers bone 40 inetieg 
a’, Sexes similar, blackish . . . . . . . . 128. ZL. selouse 
b'. Sexes dissimilar ; male blackish ee foenals red. 129. Z. gratus. 
