30 AKT. V.i. E. LÖNNBERG : 



to season. In T. jouyi the sexes seem not to differ in this 

 respect, for both birds of the breeding pair which Mr. Jouy 

 collected have the throat pure white, streaked with dusky, and 

 there can be no doubt that both birds are adult." 



The material before me (seven adult males and five adult 

 females suggest that T. jouyi is only a modification of T. cltry- 

 solaus, or rather that the former represents a younger stage of 

 the adult bird than the latter. This may be concluded from 

 the following facts : 



2(3^0^ (June 1, Aug. 3.) : Throat uniformly sooty blackish ; 

 axillaries and under-wing-coverts gray. 



Icf (June 7) : Throat sooty black but some of the feathers 

 in the middle with white base ; axillaries and wing-coverts gray ; 

 some of the latter, especially the smaller, with a rusty tint or 

 rusty edge. 



Ic/' (June 10) : Throat sooty blackish but the base of the 

 feathers to a great extent white or whitish gray, which colour 

 shines through here and there ; axillaries and under-wing-coverts 

 pale gray, partly whitish, the rusty tint being very little con- 

 spicuous and confined to the smaller coverts and to the outer 

 web of some axillaries. 



Icf (June 2) : Throat whitish, streaked with brown ; 

 axillaries and under-wing-coverts gray (not so pale as in the 

 foregoing specimen) ; the latter slightly suffused and edged with 

 rusty. 



Icf' (June 20) : Throat as in the foregoing ; axillaries and 

 under-wing-coverts gray, suffused with rusty. 



Ic/' (June 2): Throat pure white in the middle; axillaries 

 and under-wing-coverts more strongly suffused with rusty. 



Quite similar is the case with the females. One of them 



