180 Mr. J. O. Westwood on the Oriental Species 



Genus Drusilla, Swainson. 

 Hyades, Boisduval. 

 Morpho, p., Zinken-Sommer. 

 Tenures, Hiibner (Verzeichniss.) 



These insects differ chiefly from Thaumanth in the more 

 elongated form of the fore wings ; the existence of four free 

 branches of the post-costal vein of the fore wings, the second, 

 third, and fourth of which arise far beyond the extremity of the 

 discoidal cell ; the very large and striking eye-like spots with 

 which the hind wings are ornamented ; and the general dull colour- 

 ing of the insects. 



Sp. 1. Drusilla Urania, Linn. 

 Alis oblongis integerrimis fuscescentibus, disco plus minusve 

 albidis seu albis, posticis ocellis utrinque binis externo supra 

 fere obsoleto. 

 Expans. alar, antic, circ. unc. 4|. 



Syn. Papilio Urania, Linnaeus, Syst. Nat. Ed. x. p. 446, No. 48 ; 

 Mus. Lud. Ulr. p. 225; Syst. Nat. ii. p. 756; Fabri- 

 cius, Ent. Syst. iii. pt. 1, p. 166, No. 512. 

 Papilio Jairus, Fabricius, Gen. Ins. Mant. p. 258 ; Ent. 

 Syst. iii. pt. 1, p. 54, No. 168 ; Cramer, Pap. pi. 6, fig. 

 A. B., pi. 185, fig. A. B. C. ; Godart, Enc. M. ix. p. 

 445 (Morpho J.) ; Boisduval, Voy. de I'Astrolabe, 

 Entomol. pt. 1, p. 157 ; Donovan, Ins. of China, pi. 33, 

 fig. 1, 2. 

 Oreas duhia Jaira, Hiibner, Samml. Ex. Schm. Bd. pi. 

 Tenaris Nysa, Hiibner, Verz. bek. Schm. n. 493. 

 Papilio Cassice, Clerck, Icones, f. 29, f. 3. 

 Habitat in Amboyna, Rawak, New Guinea. 

 The following is the Linnaean definition published in the 

 Museum Reginae Ludovicae Ulricas. 



Papilio alis oblongis integerrimis fuscescentibus disco albis, 

 posticis ocellis utrinque binis. Corpus secundae magnitudinis. 

 Alae primores utrinque fuscae, discus albidus immaculatus. 

 Posticae utrinque fuscae disco albido, ocelli 2 grandes flavi 

 iride nigro caerulescente cincti nigredine, pupilla alba minima ; 

 horum alter ad marginem anteriorem, alter vero fere in disci 

 medio. 



Fabricius simply took up the species Urania from the writings 

 of Linnaeus as above referred to, placing it among his Heliconii, 

 not being aware of its identity with his Papilio Jairus, which he 

 had placed among his Festivi, with the following description : 



I 



