238 ON THE GENUS PYCNONOTUS 



Hab. North-eastern Africa, from -Egypt through Abys- 

 sinia to Somali Land; Southern Arabia. 



Four specimens from Egypt and one from Akaba in 

 Arabia. 



Genus Liaedorwsa Reichenbach ^). 



Type: Laedorusa analis (Horsf.). 



General aspect dull earthy brown , olive-brown or olive- 

 green , quills always more or less edged with olive-green , 

 feathers on the crown not or only feebly lengthened , ne- 

 ver forming a long crest; tarsus longer than culmen. — 

 Ten species known. 



Range. British India with inclusion of Ceylon; Su- 

 matra , Banka , Java , Borneo and the Philippine Archipelago. 



Key to the species. 



a. Under tail-coverts distinctly yellow. 

 a' . A white superciliary stripe. 



a". Upper surface earthy brown. 



a'". Ear-coverts like sides of head analis. 



b'". Ear-coverts dark brown, conspicuous . . . goiavier. 

 b" . upper surface olive-green. 



a'". Lores black, moustachial streak tinged with 



yellow luteola. 



b'". Lores white like the rest of the face . . . leucops. 

 b'. No white superciliary stripe, head olive-yellow. . xantholaema. 



b. Under tail-coverts not distinctly yellow. 



a' . Ear-coverts with narrow white shaft-streaks. 



a" . Back ashy brown, no tinge of olive-green . . Blanfordi. 

 b" . Back brown ^ tinged with olive-green. 



a'". Abdomen grayish brown ' plumosa. 



b'". Abdomen yellowish white cinerei frons. 



b' . No white shaft-streaks to the ear-coverts. 



1) The present genus contains a number of somewhat heterogeneous ele- 

 ments. Some of the species {L. analis, goiavier, luteola, plumosa, cinereifroiis, 

 simplex and pusilla) have the wing longer than the tail, while in L. leucops, 

 xantholaema and Blanfordi the wing is equal to the tail or shorter. In some 

 species the tail is nearly square, and in others more rounded, but this dif- 

 ference is not sufficient and does not fully coincide with the difference in the 

 length of the tail, so that no generic characters can be based upon. 



Notes iroir» tlie Leyden IMuseunn, Vol. XVII. 



