from the colony of Natal in South-eastern Africa. 247 
make at short intervals. They will remain on the same tree, 
and nearly the same bough, for hours together; they feed prin¬ 
cipally on caterpillars, but sometimes catch the winged females 
of the white ant as they rise from the ground, darting upon 
them similarly to the Flycatchers or Drongo Shrikes. It has a 
swift dipping flight, similar to that of the Wagtails, and when 
disturbed generally flies to a good distance. It frequents bushy 
country near the coast. 
41. Chrysococcyx auratus (Gm.). The Didric Cuckoo. 
[Sent from Natal, but not by Mr. Ayres.—J. H. G.] 
42. Chrysococcyx claasii (Cuv.). Klaas’s Cuckoo. 
These birds are more active than C. smaragdineus, not re¬ 
maining so long in the same place; they also have the dipping 
flight of the Wagtails, but do not call so frequently, and their 
note is not so loud. They feed on caterpillars. 
43. Indicator minor, Stephens. Least Honey-Guide. 
Too well known to need description. Feeds principally on 
caterpillars. 
44. Centropus superciliosus (Riipp.). Eyebrowed Spur- 
Cuckoo. 
[Mr. Ayres has sent me two specimens, which appear both to 
belong to this species. I add his remarks respecting each, pre¬ 
mising that No. 1 appears to me to be an immature, and No. 2 
an adult specimen. No. 1 is marked as $ by Mr. Ayres; the sex 
of No. 2 he has not marked.—J. H. G.] 
No. 1. Eye light brown; legs bluish slate-colour. This 
bird frequents the dense bush, and principally lives amongst 
impenetrable creepers, where it hunts about in search of the 
insects which it feeds upon; if disturbed, it flies but a short 
distance. 
No. 2. Eye splendid bright crimson; bill black; feet and legs 
light slate-colour: is common here, and frequents marshy and 
reedy places. I take it to be a distinct species from No. 1, the 
colour of the eye differing so much; but the note is precisely 
similar—a loud, melancholy, cooing noise ; they call most in wet 
weather; they are fond of getting up into trees that are covered 
with creeping plants, and sunning themselves; they generally 
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