Mr. Westwood on new Insects. 37 



Papilio Astorion, W. Alis elongatis angustis, posticis subsinuatis 

 ecaudatis ; omnibus cyaneo-nigris immaculatis ; anticarum di- 

 midio apicali subtus obscure griseo-nigricanti venis strigisque 

 intermediis nigris ; capite antice cum lateribus colli thoracis et 

 abdominis coccineis. Expans. alar. unc. 4^. \_Hab. Sylhet. 



Papilio Chara, W. Alis anticis latis apice rotundatis, anticis basi 

 nigris apice sensim infuscatis anguloque anali albido, venis 

 strigisque intermediis nigris, alis posticis cyaneo-nigris margine 

 sinuatis ecaudatis ; capite anticfe et lateribus colli, thoracis et 

 abdominis coccineis. An femina prsecedentis ? Expans. alar, 

 unc. 5i. IHab. Sylhet *. 



Papilio Castor, W. Alis latis anticis apice subacutis posticis si- 

 nuatis ecaudatis ; omnibus supra fuscis, anticis venis strigisque 

 intermediis nigris ; margine punctis minutis albis, posticis ma- 

 cula magna discoidali (versus angulum externum extensa) alba, 

 in 5 partes irregulares divisa, sinubus albo marginatis ; anticis 

 subtus macula parva ad apicem arese discoidalis, serie submar- 

 ginali punctorum (apicem baud attingenti) punctisque margi- 

 nalibus albis ; posticis fascia pone medium e maculis 7 albis 

 magiiitudine variis, serieque submarginali lunularum parvarum 

 sinubusque albo marginatis, corpore albo punctato. Expans. 

 alar. unc. 4|. IHab. Sylhet. 



Papilio Pollux, W. Alis latis posticis sinuatis ecaudatis ; omni- 

 bus supra fuscis, puncto ad apicem arese discoidalis, serie sub- 

 marginali et marginali punctorum ad apicem extensis albidis ; 

 plagisque duabus versus angulum internum ; posticis fascia lata 

 ■albida pone medium, serie lunularum submarginali, sinubus- 

 que albo marginatis ; alis subtiis similiter coloratis at fulvo pul- 

 verosis, lunulisque submarginalibus posticarum majoribus ; cor- 

 pore albo punctato. Expans. alar. unc. 4^ — 5^. Variat mag- 

 nitudine macularum. \_Hab. Sylhet f- 



Papilio Arcturus, W. Alis nigris viridi-atomosis, posticis obtuse 

 dentatis et late caudatis ; anticis striga interrupta macularum 

 ex atomis viridibus formata, ex angulo postico ad partem dimi- 

 diam alarum ducta et cum margine subparallela ; posticis supra 



* This species stands in the cabinet of the British Museum with a inanu- 

 script name attached, which I have not adopted, on the principle that in a 

 national museum no name ought to be attaclied to a species until it lias 

 been published. The opposite practice implies a right to appropriate what 

 is public property. 'J'he case is altogether different in a private collection. 



[Others of our correspondents maintain, on the contrary, that, by the rule 

 generally acknowledged, according to the custom of Cuvier, Temminck, Lich- 

 tenstein and others, — a name attached to a specimen in a public or national 

 collection is regarded as published, and is in fact quite as much so as if pub- 

 lished in a book. But see at p. 481. vol. viii. some observations of Mr. Stutch- 

 bury, on species named in museums and catalogues, and not described : — also 

 the remarks of M. Petit, p. 474.— Ed.] 



f I am indebted to the Rev. J. Stainforth for an opportunity of figuring 

 and describing this and the four preceding species. They have subsequently 

 passed into the collection of Mr. E. Doubleday. P. Astorion is also in the 

 cabinet of the Entomological Society. 



