72 lUIOPALOCERA MALAYANA. 



The larva (fig. 18) is from a drawing made in Java by Dr. Horsfield, who states that it 

 there " feeds on the young leaves of C'oceos imrifira, from December to April. 



" * 



Genus ZEUXIDIA. 



Zm.ridia, Hiibner, Samml. Ex. Schmett. 1 181C-18-2i) ; Westw. Gen. Dium. Lep. p. 327 (1851). 



Anterior wings sulitrianguliir, with the costal margin strongly arched, and the apex acute, the inner 

 margin in the male dilated and convex. First subcostal nervule emitted before the end of cell at about 

 three-fourths its distance from base, anastomosing with costal nervure for some little distance and then 

 reflexed to costa ; t the second emitted near end of costal nervure ; remaining subcostal ner^les emitted 

 near apex. Disco-cellular nervules generally as in Aiiiathiisia, and discoidal nervules well separated at 

 their bases, as in that genus. First median nervule strongly angulated at base, as in Amathusia, but 

 throwing off a short, oblique and disconnected nervule directed upwards, but not reaching the lower 

 discoidal nervule, and connected with a fold in the wing, which gives the appearance of a fourth median 

 nervule. Posterior wings subtriangular ; costal margin strongly curved and convex ; cell partly closed, as 

 in Amathusia ; anal angle attenuated and produced into a caudate prolongation between the third median 

 nervule and the submedian nervure. In male specimens this wing possesses two large and prominent 

 glands or pouches (probably scent-secreting), both of which possess a central tuft of hairs, one situate 

 between the costal nervure and first subcostal nervule, \ the second in discoidal cell. There is also a smaller 

 tuft covering an apparently small glandular pouch in the neighbourhood and near base of the submedian 

 nervure. 



The area of this genus is limited, and corresponds generally with that of Amathusia. 

 It comprises eight or nine species, one of which is at present alone knov^n in this fauna. 



1. Zeuxidia amethystus. (Tab. VII., lig. 1 <? , 2 2 .) 



Zni-iiUa amnhijxtm, Butler, Proc. Zool. See. 1865, p. 485, n. 5 ; Trans. Liun. Soc, Zool., ser. 2, vol. i. p. 538, 



11. 1 (1877). 

 Zeii~i,U„ Wallacd, Feld. Eeise Nov. Lep. iii. p. 4G1, u. 777, t. 02, f. 3 (18G6); Druce, Proc. Zool. Soc. 1873, 



p. 341, u. 2. 



Male. Anterior wings rich chocolate-brown, crossed by a large bluish subapical fascia, with purplish 

 reflections ; this fascia commences at costal margin, wliere it is broadest, and terminates near apex of third 

 median ner^-ule, where it is narrowest ; it is outwardly convex and inwardly (where it crosses about the end 

 of cell) irregulai-ly concave. Marginal fringe narrowly pale bluish white. Posterior wings rich chocolate- 

 brown, with a large bluish anal-angular patch with purplish reflections ; this patch extends upwards, and 

 somewhat convexly, from anal angle, and terminates near first median nervule ; anal-angular caudate 

 prolongation distinctly marked with white on each side, and marginal fringe narrowly pale bluish white. 

 Wings beneath pale brownish. Anterior wings with four irregular brown fasciae crossing cell, which are 

 continued on posterior wing and terminate at the median nervule ; both are also crossed by a slightly 

 waved fascia, the outer margin of which is distinctly darkest, commencing at costa of anterior wings, 

 crossing cellular apices of both wings, and terminating very obscurely near the submedian nervure ; both 

 wings have a very much waved and sinuated narrow brown fascia between apex of cell and margin, 



* Horsf. & Moore, Cat. Lep. Mus. E. I. C. i. p. 210. 



f I am somewhat at variance with I'rof. Westwood in the diagnosis of this nervule. Tliat excellent authority (Gen. 

 Diurn. Lep. p. 328) has described " two slender oblique veinlets" connecting the costal nervure with the costa. The second of 

 these is present, exactly as described by Westwood in one male specimen of Z. amethystus in my own collection, but as it is 

 absent in other specimens of the same species, and also generally throughout the genus, 1 look upon it as an aberration only. 

 The first veinlet I also consider as but the termination of the first subcostal nervule, after some lateral auastomosis with the 

 costal nervure. 



] Fritz Miiller considers the dilatation and prolongation of the inner margin of the anterior wing over the costal area of 

 the posterior wing " a never-failing indication of the presence of a scent-secreting organ" at that .spot (' Kosmos,' Jau. 1897, 

 p. 2Hr. ct seq., and Abstr. by Meldola, ' Nature,' vol. xix. p. .W?). 



