Annals of the Transvaal Museum. 
177 
the same places as C. senegalensis on the upper Zambezi, though it is to 
be noted that the wing quills are banded in the specimen from Nata River, 
which has a bright bluish black head and hind neck. On measuring the 
specimens, it became apparent that specimens of full size" still retain 
juvenile characters in the plumage', but this does not necessarily mean 
that they are fully adult, for the change might be effected before the 
following breeding season. The explanation of the few anomalies of the 
retention of more or less of a juvenile character is probably that it takes 
more than a year to discard it altogether, or it might in that case even remain 
throughout life if it was a character not easily discarded. The outstanding 
fact remains, however, that in adult specimens with blue heads and wing 
quills not banded, the retention of a trace of juvenile characters is the 
exception rather than the rule. Taking then these specimens as adults, 
of which the specimens with their measurements given below have been 
picked out from the series mentioned above, it becomes immediately 
apparent that the three specimens from Kaffraria are of a distinct species, 
for not only are the wing quills uniform, but the head is brown, the hind 
neck and mantle feathers broadly and distinctly streaked with white, and 
the sides of the throat, crop, and breast very distinctly marked with serrated 
lines on the feathers. The following table of measurements of adults will 
serve to show how very much larger the Kaffrarian birds are when com- 
pared with those from East Africa, and also that the female is larger than 
the male : — 
Centropus grilli caeruleiceps. 
Wing. Tail. 
c? Roodeval, Sabi (Ingle) Feb. 160 165 
? „ „ „ ...Apr. 173 161 
Centropus superciliosus . 
Wing. Tail. 
c? Bagamoyo, G.E.A. (Marais) June 153 200 
? (?) Rascha Rascha, G.E.A. (Joubert) Apr. 170 230 
Centropus pymi, spec. nov. 
(Kingwilliamstown Museum.) 
Wing. Tail. 
S Draaibosch, Kaff. (Pym) Feb. 179 230 
$ Izeli „ „ Nov. 185 240 
? (<£) Frankfort „ „ ? 175 223 
Tarsus. Uulmen. 
33 24 -5 
35 25 -5 
Tarsus. Culmen. 
32 29 
34 30 
Tarsus. Culmen. 
38 36 
39-5 35 
38 36 
Centropus burchelli. 
(Kingwilliamstown Museum.) 
Wing. 
<?(?$) Stutterheim, Kaff. (Pym) July 176 
$ Breidbach, „ „ .... Mar. 165 
Tail. Tarsus. Culmen. 
218 38 31 
202 36 32 
