114 Field Columbian Museu.m — Zoology, \'<)l. i. 



in that direction it extends its range to Ogaden also. It is 

 clearly distinguishable from M. pliillipsi, the color of its coat 

 being verj' much lighter and of a different hue. My series is 

 quite large enough to make this fact conspicuously plain, and, 

 although the two species are met with frequently in the same 

 localities, there can be no doubt I think, that they are indepen- 

 dent species and not races one of the other. This Dik- 

 Dik is very plentiful, and a large number would often be 

 seen in one day. It does not go in troupes, but usually only the 

 male and female would be found together, sometimes accompan- 

 ied by a young one. They would bound out of a clump of aloes 

 or from beneath some bush and go rushing away just like rabbits, 

 and it was surprising the speed at which they swept along. They 

 rarely ran in a direct course for an}' distance, but dodged about 

 among the bushes in the most bewildering way. After running 

 for a few moments they would stop and intently regard the cause 

 of their alarm, and thus give an opportunity to shoot at them 

 with some chance of success. The female always led the way, 

 ■ the male following a short distance behind. Should a young one 

 be of the part}^ it generally took the lead, and showed fully as 

 great speed as the parents, keeping ahead with apparently no 

 effort. Their slender legs, no larger than pipe stems, move with 

 such rapidity that they become invisible, and it would seem that 

 they could hardl}' withstand the shocks and hard usage they must 

 receive on the rough, uneven ground their owner delights in. 

 Dik-Dik feed on leaves and shoots of various bushes, and seem 

 to be rather dependant on a supply of water, though where the 

 individuals living to the south of Toyo Plain and similar dr}' 

 localities procured it, would be difficult to ascertain. 



Posterior portion of parietal and occipital region almost at a right 

 angle to the upper line of the skull, which from the anterior portion 

 of the parietal to the end of nasals is flat, with a slight slope for- 

 ward. Nasals much wider than deep, with a deep recess over 

 either side of the median line at anterior end, and rounded, being 

 much higher in the middle than on the sides. Like the other 

 species of the genus, the zygoma is short, formed about 

 equally by processes from the squamosal and the malar respec- 

 tively. Lacrymal fossa deep and long, extending well over the 

 anterior portion of the maxilla. Premaxillae rather long and 

 slender, nearly straight for the anterior half, and rising posteriorly 

 in an upward curve to the nasals. Palatines small, produced 

 medianly not beyond the posterior edge of first molar. 



