of the Genus Teracolus, Swains. 465 



extreme wet-season form, is usually distinctly larger than the 

 wet-season form of T. evenina ^ and always has all the dark 

 markings much heavier, the black marginal spots of the 

 secondaries being connected by grey scaling into a continuous 

 or partly confluent border and frequently preceded by a lunu- 

 lated greyish submarginal stripe. Even Mr. Trimen, who 

 states that the two species are inseparable, is constrained to 

 admit that T. sipylus is " somewhat more heavily marked." 

 T. callidia chiefly differs from the latter in having the second- 

 aries below " brownish-white," and is probably an inter- 

 mediate phase between the wet- and dry-season forms ; the 

 dry- season form is T. casta, which is far more lightly marked 

 than any South- African example of T. evenina. It is true 

 that in Gerstaecker's figure and in our single example the 

 male has a white under surface ; but this is often the case 

 with individuals of the dry-season phase in other species of 

 the genus, as, for instance, in those examples of T. dedecora 

 (the dry-season form of T. eupompe) to which Felder gave the 

 name of T. theopompe. 



Did intergrades between T. evenina and T. casta exist, one 

 would be bound to regard them as one species ; but the sup- 

 posed intergrades prove to be nothing of the kind when 

 examined with a view to seasonal variation, and the two 

 species remain as representative localized forms. 



5G. Teracolus Carteri. 



Teracolus Carteri, Butler, Ent. Month. Mag. xviii. p. 227 (1882). 

 Teracolus laura, E. M. Sharpe, Ann. & Mag. Nat. Hist. ser. 6, vol v 

 p. 441 (1890). 



Ranges along the West Coast of Africa from Senegambia to 

 Accra, and thence across the continent eastwards to the 

 Albert Nyanza. 



Of this species I have only seen wet and intermediate 

 phases. If a dry-season form occurs it should be looked for 

 in Central Africa. Both types of the species belong to the 

 wet- season form. 



This may be regarded as a heavily marked development of 

 the more widely distributed T. isaura, like which species it 

 has the basal suffusion softly diffused, instead of almost 

 uniform in tone with the blackish internal spot on the 

 primaries. The wet-season form, however, is much larger 

 than T. isaura, much more heavily bordered with black in 

 both sexes, and with a black inner edging to the apical orange 

 patch in the male. The intermediate form is as heavily 

 bordered as the wet phase of T. isaura, whilst both wet and 

 intermediate forms have the wings on the under surface 



