462 Dr. A G. Butler—A Revision 
48. Teracolus xanthus. 
3. Teracolus xanthus, Swinhoe, P. Z.S. 1884, p. 440, pl. xxxix. fig. 10. 
Teracolus comptus, Butler, P. Z. S. 1888, p. 94. 
Teracolus bifasciatus, EB. M. Sharpe, Ann. & Mag. Nat. Hist. ser. 6, 
vol. v. p. 886; 9, Waterhouse, Aid, pl. clxxxix. (1899). 
Ranges from Upper Egypt southwards to the Victoria 
Nyanza and Kilima-njaro, and thence to Nyasaland. 
This is a northern and eastern development of 7’. antigone, 
usually smaller and more weakly marked on both surfaces, 
especially in the wet-season form. Only the more heavily 
marked examples of this form show any trace of the yellow 
basal suffusion on the under surface. At the same time it is 
possible that where the two forms meet they may interbreed, 
as is the case with some of the local races of birds. 
49, Teracolus metagone. 
Teracolus metagone, Holland, Proc. U.S. Nat. Mus. vol. xviii. p. 760 
(1896). 
Kast Africa. 
This is a wet-season or intermediate form apparently nearly 
approaching 7’. xanthus, var. bifasciatus (=comptus) ; but 
without examining either a good figure or a typical example 
it would be rash to assert its identity with that species. It 
must, however, be borne in mind that the internal fascia on 
the primaries which occurs in the type specimens both of 
T. bifasciatus and comptus and the small transverse spot near 
the posterior extremity of the orange apical patch are not 
constant characters, but grade away to nothing even in our 
series. 
50. Teracolus interruptus. 
Teracolus interruptus, Butler, P. Z. 8. 1871, p. 724; Lep. Exot. p. 115, 
pl. xliii. figs. 1, 2 (1872). 
Teracolus lucullus, Butler, P. Z. 8. 1876, p. 143, pl. vi. fig. 4. 
Teracolus gelasinus, Butler, t. c. p. 148. 
Appears to be confined to Angola and the neighbourhood 
of the Congo near its mouth. It is readily distinguished 
from the more northerly West-African type 7. antigone by 
the absence of lemon-yellow at the base of the primaries 
below in any of its phases; the black internal bar is very 
faintly indicated in the wet-season form and wanting in the 
intermediate and dry forms. 
