A new species, Chamaeleo harennae, is described from forested sites in
the Bale Mountains of Ethiopia. In the form and relative prominence o
f crests on the posterior region of the head, it closely resembles C.
affinis Ruppell 1845, but differs most conspicuously from this species
in the possession of an exceptionally well developed gular crest, sim
ilar to that found in C. hoehnelii Steindachner 1891 and C. rudis Boul
enger 1906.