( ^i ) 



by the Thyridia ; for the species allied to the former, — Jlfetkona 

 themisto, Hiibn., and M. singularis, Staud., — resemble M. 

 confusa; while in the Thyridias allied to psidii, — pallida, 

 Godm. and Salv., ceto, Feld., and oedesia, D. ct^ H., — a compara- 

 tively large section of the pale basal ai^ea is visible below 

 the nervure. Thyridia hippodainia, F., presents a condition 

 similar to that of T. psidii. 



There is also a tendency in the Itunas and especially in 

 Eittresis imitatrix, for the median transparent area to be 

 nearly equally divided by the black and prominent vein which 

 ti'averses it. This tendency is less marked in the Thyridia, 

 and still less in the Methona ; and here too the latter has 

 apparently acted as the model for the former ; inasmuch as in 

 the allied Thyridia oedesia, the area in question is divided by 

 a heavily marked band. 



Finally, the facts of geographical distribution entirely sup- 

 port the conclusion that the transparent species of Eutresis are 

 mimics of Ituna phenarete and not of /. ilione. The latter is an 

 eastern and southern species: of 16 examples in the British 

 Museum, 2 are from Rio, 2 from Minas Geracs, 3 from Brazil, 

 2 from S. Brazil, and 7 from Paraguay. /. phenarete, on the 

 other hand, is a western species : of 15 examples, 10 are from 

 Bolivia, 3 from Peru, 1 from Ecuador and 1 from Tabatinga 

 (Amazons). The three examples of Eutresis imitatrix and all 

 of E. hyspa are from Ecuador, while the single undesci'ibed 

 form is from Peru. 



Papilios from the Malay Archipelago. — Dr. K. Jordan 

 exhibited on behalf of the Hon. Walter Eothschild some 

 interesting Papilionids. Troides alexandrae, Rothsch., remark- 

 able for the beauty of the ^ and the gigantic size of the 9 , is 

 a new discovery by A. S. Meek, who found this fine insect in 

 the north-eastern portion of British New Guinea at some dis- 

 tance inland from the coast. The species is nearest to Troides 

 victorisR from the Solomon Islands, of Avhich a very distinct 

 geographical form (^ruhianus) was shown for comparison. The 

 gynandromorphic specimen of Troides exhibited is the only 

 one known of this genus, and was obtained by Dr. L. Martin 

 in South Celebes. It belongs to T. haliphron, the left side 

 being ? and the right side <$ . 



