356 MESSRS. A. R. WALLACE AND F. MOORE [June 12, 



species which occur in the collection belonging to the forest-haunting 

 genera Euploea and Pontia appear to be quite distinct from any yet 

 described. There is also a Pieris which exhibits sufficient depar- 

 ture from the allied Indian and Malayan forms to deserve a separate 

 specific name, and a small Lyccena which seems quite new. It is 

 probable that at least four times as many species as are here given 

 exist in Formosa ; and it is to be hoped that Mr. Swinhoe may yet 

 have an opportunity of continuing his researches. Some notes on 

 the habits of the various species sent by that gentleman have been 

 incorporated in the accompanying list ; and the five new species of 

 Butterflies which the collection contains have been described as a 

 first instalment towards the insect-fauna of a new and most pro- 

 mising region. The new species are Pontia niobe, Pieris formosana, 

 Terias vagans, Euplcea swinhoei, and Lyccena ni.ia. Mr. Frederic 

 Moore, who has paid much attention to the nocturnal Lepidoptera 

 (Heterocerd), has furnished the list of that part of the collection, in 

 which, however, it has not yet been possible to determine all the 

 obscurer species. 



Section RHOPALOCERA. 



1. Papilio diphihts, Esper (polydorus, Bd.). 



A common Butterfly in India, the Philippines, and the Malay 

 islands. The Formosan specimens most nearly resemble the Indian 

 form. 



Mr. Swinhoe says, " Found near villages ; I have not observed 

 this species in China." 



2. Papilio androgeus, Cr. 



The Formosan specimens of this very variable species are nearly 

 the same as some from India and China. 



"Very variable ; two seldom seem alike. Some females have no 

 tails." — Swinhoe. 



3. Papilio pammon, L. 



" Found in gardens ; not common." — Swinhoe. 



4. Papilio erithonius, Cr. 



Agrees with Chinese specimens. 



" Very common." — Swinhoe. 



Mr. Swinhoe mentions seeing a tailed species like this, which he 

 supposes to be P. machaon. It is more likely it would be P. de- 

 motion, Cr., or perhaps a new species altogether. 



5. Pieris formosana, n. s. 



Male. Above, exactly as in P. hippo, Cr. {eleonora, Bd.) . Beneath, 

 the apical spot on the upper wings is larger ; the disk of the lower 

 wings is white washed with yellow, which is deepest at the base and 

 outer angle ; and the marginal dusky band is narrower. 



Female. Above, like P. hippo, Cr., but the hinder wings dusky, 



