22 BULLETIN 99, UNITED STATES NATIONAL MUSEUM. 
Genus CERCOCEBUS Geoffroy. 
1812. Cercocebus Grorrroy, Ann. Mus. Hist. Nat., Paris, vol. 19, p. 97. (C. 
Suliginosus.) 
1870. Semnocebus Gray, Cat. Monk., Lemurs, and Fruit-eat. Bats Brit. Mus., 
p. 27. (C. albigena. Not Semnocebus Lesson, 1840.) 
1903. Lophocebus PatmEer, Science, new ser., vol. 17, p. 873. May 29. (C. 
albigena.) 
1914. Cercolophocebus Matscuig, Sitz.-ber. Ges. nat. Freunde Berlin, p. 341. 
July. (C. aterrimus.) 
The mangabeys are chiefly confined to western and central Africa, 
but two species occur in the region covered by this report. One of ° 
these was collected by the Smithsonian African Expedition in Uganda. 
CERCOCEBUS ALBIGENA UGAND& Matschie. 
1913. Cercocebus albigena ugandae Matscut®, Rev. Zool. Africaine, vol. 2, fasc. 2, 
p-210. February. (Near Entebbe, Uganda; typein Berlin Museum.) 
Specomens.—Four, from— 
Uceanpa: Kampala (Mearns). 
This series of the Uganda mangabey includes one adult male, two 
adult females, and a very young male. The young male lacks the 
brown mane and collar of the adults and is entirely black. The skin 
of the adult male has been mounted. The three adults measure as 
follows, the external dimensions from the field catalogue records of 
Doctor Mearns: 
164579, | 164578, 164680, 
male. female. female. 
Headiangdiibody ers itt EA ae he bac Pesca ees Se I A BR 610 510 515 
ailivertebree. a-22 Be seen od aa sae eee he Ree ee ee eee 780 720 680 
DERIN AMO OU yo = ha15t seats ie ee eS ee amnion ae 160 146 135 
TItire Car’ er icis occas croc aie =o ee ee ee eee eae 36 25 33 X 24 33X24 
DERN ae: 25 UR SR innar one MBG baaed ieee Ri PLEA Mv ot ct tice Lm Uae | 142 120 | 123 
Canidalipencll eae sence crc eee sere ise een cis Erne ee ea aera rete 90 80 85 
HGeeOHupper lIpiWOC Vera sace see sea noea ne eee eee meen oe ens eees 56 AG 46 
Skull: | 
Greatestilenothces se 38: oe eee See Pn eee as 116 108 103 
Condylobasalelenp this sess afc Maes ea eee eas Sree atc | 93 83 81 
Aycomatic bread this - sas so nee eee eee ee Sele ieee omen ee 73.8 66.6 68.4 
Mastoidoreagtheg) $335 2ee Sse ee oe nee eee ee eee ceees 63.2 60.3 58.5 
BreadtinoLrostmimiovericanine 3252 1- se eee ee cee aa 34.3 28.5 28.0 
Acenp th ormandipley cease cee eee ees eee cae 85.4 71.6 73.6 
MITLITEVUpPeriLOOUMTOWsaaacecee cae Meet ecco coc c be ee eater eee 51.7 «7.2 46.4 
Uppermolar=—premolan’seniest.ji225e0 Stok tes sce eee ohsee 31.3 28.7 28.5 
Entiremandipulan,toochslowes-t s.-<c2 seeeck «ost - Seeecreecion obese a 9 45.2 44.8 
Doctor Mearns records the iris in all three adult specimens as 
yellow-brown. 
Another species of Cercocebus, described by Peters,’ from the coast 
region of British East Africa, is not represented in our collections. 
1 Cercocebus galeritus Peters, Mon-ber, K. Akad. Wiss., 1879, p. 830. 
