IN THE NORWICH MUSEUM. 33 
Our next two genera, Harfagus and Dissodectes, are 
(like the genera Aviceda and Gaza amongst the Perns,) 
distinguished by a double notch or tooth in the cut- 
ting edge of either side of the upper mandible. The 
genus, /Zarpagus, consists of two species, which are 
both natives of ‘Tropical America. The genus 
Dissodectes, of three species, of which two are 
natives of inter-tropical Africa, and the third of the 
Island of Madagascar. ‘The rarer of the two African 
species (Déssodectes dickinsoni) was discovered by the 
late Dr. Dickinson on the banks of the river Shiré, 
in South Eastern Africa, and was figured in the 
“Ibis” for 1864, from a specimen in the Norwich 
Museum. It is believed that the British and Norwich 
Museums are the only collections which contain speci- 
mens of this very scarce species. 
The succeeding genus, //ypotriorchis, comprises the 
Hobbies, of which there are nine species known, 
three of which are natives of America, and six 
of the temperate and warmer countries of the Old 
World, where they are widely spread over Europe, 
Asia, and Africa, as well as in Madagascar, Australia, 
and several of the Islands in the Indian Ocean. 
They are all birds of comparatively small bulk of 
body, and of great proportionate length of wing, 
points that are well exemplified in the British Hobby, 
which is a summer visitor to this country, where it 
formerly bred regularly in the larger woods, especially 
those of the southern counties, but is now so fre- 
c 
