1896. | FROM NYASA-LAND. 835 
one male: it is the dry-season form of 7’. aurigineus, and until 
this collection came to hand was only represented by the typical 
male example from Kilima-njaro in the Museum series ; nor have 
I seen it in any other collection. 
91. TERACOLUS OPALESCENS. 
2. Teracolus opalescens, Butler, Ent. Month. Mag. xxiii. p. 30 
(1886); ¢. P.Z.S. 1896, p. 125. 
3. Dry-season form. 
On the upper surface this only differs from the male of the 
wet-season form in the absence of the black marginal spots to the 
secondaries; on the under surface, however, it differs in having 
the apical area and costal margin of the primaries and whole 
surface of secondaries flesh-pink, tinted on the costal borders and 
internervular folds with ochreous; the disc of the secondaries 
crossed by a series of brown dots. Expanse of wings 51 millim. 
Bangara, W. coast of Lake Nyasa, August 18th, 1895. “If 
once missed, is exceedingly difficult to take” (2. C.). 
The arrival of this example is particularly interesting to me, 
for it shows that my belief in the local constancy of some of the 
named forms of the 7’. eris group is, so far, borne out, the seasonal 
forms of this Eastern and Central African type being both easily 
separable from the more southern examples. 
The type of 7’. eris was obtained at Ambukohl, in Lower Nubia, 
and is probably the true male of my 7. abyssinicus, of which we 
only possess females: the figure agrees most closely with a male 
(wet-season form) received from Kilima-njaro, the orange apical 
spots on the primaries being short, the outer edge of the upper 
portion of the white area, beyond the cell, less oblique than in the 
southern forms, or than in 7’. opalescens, and the black costal belt 
of the secondaries extending on the disc to below the second sub- 
costal branch ; it, however, differs in having a small white spot 
near centre of outer margin of primaries, a character which may 
be variable. The southern forms are certainly not typical 7. eris; 
nor can 7’, johnstont be correctly called the dry-season form of the 
Natal examples presented to us by Mr. E. C. Buxton, inasmuch as 
the latter have the under surface of the wings pink, and must there- 
fore themselves be the dry-season form of Mr. Trimen’s 7. eris 
(of which he says: ‘* Underside— Whitish or yellowish-white”’) and 
identical with his variety A. 
If, then, certain Lepidopterists prefer to regard the representative 
forms of 7. eris as mere local phases of one species, the fact that 
each of them has its dry- and wet-season forms distinct from the 
others gives them at least a claim to be regarded as subspecies 
and to retain distinctive names. 
92. TERACOLUS SUBFASCIATUS. 
3. Teracolus subfasciatus, Swainson, Ill. 2nd ser. iii. pl. 115 
(1833). 
3, Mweniwandas, Nyasa to Tanganyika plateau, Dec. 15th, 
1895, (Dry-season form.) 
