TBEACOLUS. 91 



patch on the primaries more suffused and, in some specimens, almost hidden by 

 a shading of dusky brown. 



Male. — Central area of the primaries almost white ; the orange apical patch 

 somewhat larger than in the allied species, and enclosed on the inner side by a band 

 of pale yellow ; the costa, apex, and hind-margin narrowly edged with black. 

 Secondaries entirely creamy-white, the nervules terminating on the hind-margin in 

 faint dusky spots. 



Underside. — Primaries whitish, the apical area tinged with orange, three very 

 minute dusky spots being visible between tlie sub-costal nervules ; base of wing 

 greenish. Secondaries entirely pcarl3'-wliite, with the usual minute black disco-cellular 

 spot. 



Expanse r6 inch. {Spec, ex Tsavo River, January 1892; Jackson Coll.) 



Female. — Primaries with the discal area pale yellow ; basal area dusky grey ; 

 apex and hind-margin brownish as far as the first median nervule, the orange apical 

 patch crossed by a median line of brown markings ; two additional brownish spots 

 strongly pronounced, one situated at the end of the cell, with a second spot in the 

 white area towards the posterior angle. Secondaries pale yellow, rather dusky at the 

 base ; the brownish nervular spots on the hind-margin large, and the discal row of 

 spots decidedly distinct, but not connected. 



Underside.— -VxmrAv'w^ pale yellow, somewhat deeper in colour at the base ; three 

 silver spots encircled with orange indicating the dark median line of the ujjper 

 surface; the cellular and posterior spots also reproduced on the under-surface. 

 Secondaries whitish, the hind-margin with a yellow shade, the discal band much 

 broken up. 



Expanse r4 inches. (Sjjec. ex Atbara River ; Mus. Brit.) 



White form of Female. — The orange patch only faintly indicated, the whole 

 of the primaries being suffused with smoky-brown. Secondaries pearly-white, the 

 spots and markings similar to those of the female above described. 



Underside. — Primaries white, the base greenish-yellow ; apical area pale yellow, 

 with faint vermiculations of brown ; the median band similar to that of the yellow 

 form of the female above described. Secondaries white, the discoidal spot and discal 

 band dusky-brown, with a slight shading of the same colour also visible on the hind- 

 margin and at the base of the wing. 



Expanse 15 inches. {Spec, ex Atbara River ; Mus. Brit.) 



" Intermediate " form of Male. — The orange patch on the primaries somewhat 

 larger than in the typical form, with a broad inner line of sulphur-yellow ; basal 

 area pale yellow, dusted with grey ; the black hind-marginal border very narrow. 

 Secondaries pale yellow, with distinct nervular spots of brown on the hind-margin. 



