1897.] BUrTERFLTES OF THE GENC7S TERACOLUS. 15 



Idinais eucheria, Mabille, Ball. Soc. Ent. Fr. p. 174 (1879); 

 Grand. Hist. Madag. pi. 41. fig. 5 (1887). 



There seems to be little doubt that Idnvds mlriam, Feld., is only 

 the dry-season form of T. pleione (Kl.), having the black borders and 

 discal yellow markings rather more reduced. Idmais eucheria, Mab., 

 is unquestionably referable to this species. T. pleione is essentially 

 an Arabian species, but there is one specimen in the British 

 Museum from the White Nile. M. Mabille records it from Mada- 

 gascar, whence he also records two other Arabian species, \nz. 

 jjhisadia, God., and halimede, Klug. If this be correct, it is a fact 

 of the highest importance in geographical distribution, but the 

 carelessness which is unfortunately so evident in much of 

 M. Mabille's work prevents my accepting these records without 

 further evidence. 



27. TeEACOLUS HBLIOCAUST0S. 



Tenicolus helioeausfus, Butl. Proc. Zool. Soc. p. 768, pi. xlvii. 

 figs. 8 & 9 (1885). 



This species is the Somali representative of the Arabian T. pleione 

 and T. halimede. It resembles the latter in the distribution of 

 yellow in both wings, but is nearer T. pleione in its size and in the 

 absence of the grey at base of fore wings. 



28. Teeacoltjs vets-osus. 



Idmais venosa, Staudinger, Exot. Schm. p. 43, pi. xxiii. (1885). 



This is a very distinct little species, being pure white above, 

 with the ends of nervules and a narrow border black in primaries, 

 and comes closest to the T. halimede group. As yet it has only 

 been found on tlie east coast of Africa, close to the Equator. 



29. TeRACOLUS LEO. 



Anthocharis leo, Butler, Ann. Mag. N. H. (3) xvi. p. 397 (1865). 



Teracolua halimede, Butler (part.), Proc. Zool. Soc. p. 133(1876). 



This is the Central-African representative of the Arabian 

 T. halimede (KL), from which it diifers constantly in the restriction 

 of the yellow patch in fore wing below 3rd median nervule. It 

 appears to be fairly common in the country lying between Victoria 

 Nyanza and the coast, and Butlers type specimen is from the 

 White Nile '. The seasonal forms are well marked, the black 

 borders being almost obsolete in the dry season and the underside 

 of hind wings covered with grey freckling. 



30. Teracolus halimede. 



Pontia halimede, Klug, Svmb. Phys., Ins. pi. vii. figs. 12-15 

 (1829). 



Pontia acaste, Klug, ibid. pi. vii. figs. 16, 17 (1829). 

 Pierispohjcaste, Boisduval, Sp. Gen. Lep. i. p. 525 (1836). 



^ Mrs. Lort Phillips captured a single male in Somaliland {teste E. M. 

 Sharpe). 



