320 Mr. A. R. Wallace on 



Terias, Swainson, 

 These small white and yellow butterflies are generally dis- 

 tributed throughout the tropics, where they frequent gardens 

 and plantations and tlie skirts of the forests rather than their 

 deeper recesses. They also assemble on the margins of streams 

 and on the sea beach. These habits lead to their being fre- 

 quently carried off by winds, and it is tluis perhaps that some 

 of the species have so wide a range and offer such perplexing 

 variations. From their great similarity, and their commonness in 

 the tropics, they have been somewhat neglected, and we do not 

 yet possess materials sufficient to determine the limits of many 

 of the forms. I have described a few new species which ap- 

 pear to be sufficiently distinct, but the whole genus is at present 

 in a very unsatisfactory condition. 



1. Terias har'ina, Horsfield. 



Terias harina, Horsf. Cat. Lep. E, I. C. p. 137 j Bd. Sp. 



Gen. p. QQS. 



Hah. — India, Malacca, Java, Borneo, Philippines, Celebes, 

 Batchian, Ceram, Aru Islands (Coll. Wall.). 



This species varies little ; the specimens from the Moluccas 

 have the apical border narrower than in those from the western 

 islands. The female is much paler and sometimes has a broader 

 apical border. The Philippine form has a narrow border to the 

 hind wings, and might almost be considered a distinct species. 



2. Terias angidata, Wallengren. 

 Terias angttlala, Walleng. Wien. Ent. Monats. iv. p. 34. 



" Alis posticis angulatis ; omnibus albis, margine exteriore 

 late nigro, introrsum undulato, maculaque flava ad angulum 

 anticum alarum posticarum notato, basi in parte superiore 

 alarum anticarum pone cellulam albo-flavescente." (Walleng.) 



Hab. — Sandwich Islands. 



3. Terias l(Bla, Boisduval. 

 Terias leeta, Bd. Sp. Gen. p. C74. 



Hab. — N.W. India, Afghanistan, Nepaul, Bhotan (B. M.). 



4. Terias venata, Moore. 



Terias venata, Moore, Cat. Lep. E. I. C. p. 65, pi. Ila. f, 2, $ . 

 Hab.—^. W. India. 

 The female scarcely differs, except in being more dusky. 



