20 
aLLEN’S NATURALIST'S LIBRARY. 
greatly from Cuckoos, and are, moreover, entirely confined to 
the Ethiopian Region. 
The Family Cuculidce, which is co-equal in extent with 
the Sub-order, as defined above, contains six Sub-families, 
di P. F.n. 
Left foot of a Cuckoo {Eiidynamis cyanocephald), to show the arrange' 
ment of the plantar tendons. [From the Catalogue of Osteological Speci- 
mens in the Museum of the Royal College of Surgeons.] F.H., Flexof 
lon^is halhuis ; F.P., Flexor ferforans digUorunt. 
viz., the True Cuckoos {Cuculince), found all over the world) 
the Lark-heeled Cuckoos ( Centropodince), distributed over th« 
tropical portions of the Old World, the flush Cuckoos {Ph«ni' 
cophce-ina), inhabiting the tropics in Africa, India, and the 
