Mr. E. Doubleday on some Lepidoptera. 175 



are six small ochraceous spots ; the interstice between the costal 

 and subcostal nervures marked with a black vitta : a black cloud 

 at the end of the cell and in each of the interstices of the ner- 

 vules. Below, the anterior wings as above, but paler, the poste- 

 rior with the markings of the disc more distinct ; the marginal 

 band fuscous posteriorly, black anteriorly, where it is marked 

 by two pure white dots in each interstice. 



Head large, black, the vertex with two white dots, palpi and 

 orbits white. Antennae ochraceous, the base black. 



Thorax very robust, black above, with an ochreoua line down 

 the middle ; three spots of the same colour on each side near the 

 base of the wings, two white dots on the prothorax: below 

 ochreous, striped laterally with black j legs black ; cox^ striped 

 with ochreous. 



Abdomen robust, elongate, brown above, more fulvous below, 

 where it is marked with a median black line. 



In the cabinet of the British Museum. 



This extraordinary insect is without exception the most re- 

 markable Piipilio yet found in the New World. In form and 

 colouring it so closely resembles the Heliconian butterflies of the 

 same group as Hel. Eva, that but for its robust body it might 

 easily be mistaken for one of them. Its pale antennee are a re- 

 markable character ; for I only know one other species of true 

 Papilio (P. Anterior) in which the antennae are of any other co- 

 lour than black except some small spot at the base or apex ; but 

 here we have them precisely resembling those of HeL Eva in 

 colour. Whilst however it possesses these subordinate characters 

 of the Heliconians, it has all the essential characters of Papilio^ 

 or I might say of Ornithoptei-a ; for in the form of the head, tho- 

 rax and abdomen, it comes nearer to Orn. Priamus than to any 

 true Papilio I am acquainted with. 



The only specimen I have ever seen was found in Venezuela 

 by Mr. Dyson, whose indefatigable exertions as a collector merit 

 the highest praise. 



Genus Amathusia. 

 Am. Amythaon. Alis omnibus supra fuscis, anticis fascia obliqua lata 



laete cserulea (in ? fulva) ; subtus paUide chocoladinis, strigis plu* 



rimis transversis saturatioribus, posticis ocellis duobus albo pupil- 



latis. Exp. alar. 5 unc. vel 122 mill. 

 Hab. Silhet. 



Above, all the wings fuscous black, dai'ker, especially the pos- 

 terior near the base ; the anterior traversed by a broad oblique 

 band of a beautiful light blue, with purplish reflections, com- 

 mencing on the costa above, opposite to the middle of the cell, 

 and occupying in width about one -third of the costa, extending 

 obliquely across to the submedian nervule, and terminating near 



