From the ANNALS AND MAGAZINE OF NATURAL HISTORY 

 Ser. 6, Vol. xx., December 1897. 



A Revision of the Species of Butterflies belonging to the Genus 

 Teracolus, Swains. By ARTHUR G-. BUTLER, Ph.D., 

 F.L.S., F.Z.S., &c. 



[Concluded from p. 473.] 



67. Teracolus Hildebrandti. 



Callosune Hildebrandti. Staudinger, Exot. Schmett. p. 45, pi. xxiii. 



(1886). 



From Nyasaland northward to Uganda and eastward to 

 Mombasa. 



This species is certainly dimorphic in its wet and dry 



phases, having the apical patch on the primaries either dull 



ochreous or bright crimson ; it is very closely related to the 



southern T. Annw, but is, generally speaking, a slightly larger 



insect with a little less black about it, the female of the wet- 



' season form clearer and more cream-tinted on the under 



1 surface of the secondaries. At the same time its dimorphic 



character is its best one, the crimson-tipped forms (especially 



the males) of the two butterflies being remarkably similar in 



every respect. It is curious that just when Mr. Marshall was 



( stating that this species had " only been received from the 



basin of the Sabaki River," we were receiving a male of the 



i dry-season form from Nyasa, completely proving the specific 



identity of this species with the crimson- tipped representative 



jof T. Annce, four examples of which from Nyasa stand in the 



Hewitson series, whilst the Godman and Salvin collection 



j contained seven now transferred to the Museum series. An 



i example of the dry-season form of this variety is recorded by 



Mr. Marshall in a footnote as T. Annce' yet he professes to 



'distinguish the two species partly by the black inner edging 



to the apical patch a very unreliable character, which varies 



considerably in T. Annce itself. 



68. Teracolus Annas. 



Thestias Anna, Wallengren, Kongl. Svensk. Vetensk.-Akad. Handl. 



1857 ; Lep. Rhop. Catfr. p. 66. 

 Anthocharis Danae, Hewitson (nee Fabr.), Gen. Diurn. Lep. pi. vii. 



fig. 3 (1847). 



Teracolus cinerascens, Butler, Cist. Ent. i. p. 172 (1873). 

 Teracolus Wallengreni, Butler, P. Z. S. 1876, p. 157. 

 Callosune Wallengreni, Westwood, in Oates's Matabeleland, p. 341. 



pi. E. fig?. 3, 4(1881). 

 Callosune confusa, Westwood, /. c. p. 348 (1889;. 



from Natal to the Zambesi. 



