n 



To these descriptions may be added : — 



<? . The abdomen is of the most vivid lemon yellow, with 

 a slightly orange dorsal centre extending to the beginning 

 of the anal segment, which has a triangulate band of deep 

 softened black, broadest in the middle, as in most of the 

 <? <? of the genus Omithoptera; the sides of the abdomen are 

 are clouded with black more or less dense ; in some 

 specimens this clouding is interrupted by the articulations 

 of yellow, while the subdorsal articulations are well defined 

 in black. The thorax has the green central longitudinal 

 stripe peculiar to this genus, all other parts as well as the 

 head being entirely velvety black ; the eyes are reddish- 

 brown. 



There are two well-defined types of colour and under- 

 surface markings in the $ $ of this species. One is deep 

 bluish-green, the other a warmer green, more like that of 

 the <? Arruana. In one type there is always a suboval 

 black spot, sometimes small, or little more than a few 

 black scales, in other examples large, situated between 

 the submedian nervure and the 3rd median nervule which 

 is very much independent of the black atoms which extend 

 from the inner side of the submedian nervure ; in the 

 other type it coalesces with them so as to form a 

 black patch which fills up the greater part of the space to 

 the yellow band ; [see figures] in such cases the base 

 is broadly black also. The costal yellow spot or patch 

 on the under side varies in size, and is often followed by a 

 second after the black spot, which seems sometimes to 

 separate what would otherwise be a continuous yellow 

 mark. The same then obtains on the upper side, but the 

 black spot is absent, its place being taken by the general 

 green of the wing which naturally nearly divides the 

 yellow. Viewed against the light in a certain position the 

 upper side of this species has the colour reflections like 

 the ground colours of P. Crcesus — the costal band of 

 green looking exactly like the latter when viewed in the 

 same position, the reflections on the under wings being 

 rather more coppery, or like those of O. Priamus, and the 

 hastate green markings of T. Brookeana. The costal green 

 band is long and rather plumose-shaped, and varies in 

 form and colour in almost every specimen. In the plate 

 are given 7 examples of variation, all from my own col- 

 lection. In one specimen in the Museum of Dr. F. Walker 

 the apical end is 6 mm. broad from the 4th and 5th sub- 

 costal nervules, about 7 mm. of the length being divided 

 by nearly 3 mm. breadth of black. The green normally 

 reaches to within 3 mm. of the anterior angle ; but one 

 example in Mr. H. Grose-Smith's museum runs nearly 

 to the fringe. In a specimen of the Hewitson collection 

 the outline copies very closely that of Priamus. In the 

 plate will be found sketches of the male (or sericeous) 

 patch [a 1 , b 1 , d ,l! ) to show variation. The specimen from 

 Dr. Walker's collection, quoted above, has a wwcMarger and 

 more prominent patch, differing also from these in outline ; 

 the Hewitson example is very prominent in colour also. 

 On a wing denuded by the Waterhouse process this 

 sericeous patch does not show so much as in other species, 

 but very little importance can be attached to this fact 

 without examining a good series of the same species so 

 prepared. In some specimens the spots of the wings are 

 assymetrical, though not to the same extent as in 



JEtheoptera Victoria: 2 ; the costal green band or stripe is 

 also occasionally assymetrical for the two wings. I have 

 given a diagram of a curiously waved neuration in a speci- 

 men in my own collection, where all the veins of the 

 forewing are waved or bent just as the 3 median nervules 

 always are in this genus. The length of the costa in the 

 largest British Museum example is 60 mm.- — the exact size 

 of my largest ; width of upper wing 40 mm. ; length of 

 hind wing 35, and width 27 mm. Length of antenna and 

 of abdomen 24, and of thorax with head 17 mm. 

 Length of legs 1st pair — femur 9 ; tibia 7 ; tarsi 10 mm. 



■ 2n d ,, ,, 9; ,, 9 ; ,, 11 mm. 



(3rd ,, ,, 2 ; ,, 9 ; ,, 11 mm. 



Length of costa of smallest specimen in British Museum 

 53, and of my smallest 51 mm. 



? . The variations in the markings and colours are not 

 nearly so great as in the 3 . The white markings within 

 the discoidal cell, however, change in form and extent in 

 different examples, sometimes being like that in figure 6b 

 of the plate ; occasionally divided into two or three spots ; 

 sometimes the two lower divisions of the spot are obso- 

 lete, the upper division only remaining, and being very 



small. The size, position, and forms of the markings are 

 generally repeated faithfully on the under side, with an 

 occasional assymetry. The abdomen is greenish-black 

 above (the black being composed of a multitude of 

 scattered atoms, the central dorsal portions being some- 

 times of a dark brown ; the latter portions yellowish, 

 with heavy black spots in some examples, and smaller 

 dots or spots close to the articulations ; the extreme sub- 

 dorsal is yellow, the articulations well defined in black. 

 The thorax is black ; the collar red and divided ; eyes 

 red brown ; the red breast spots are found on the meta-, 

 meso-, and prothorax, the mesothoracic spot being much 

 the largest. 



Length of costa in the largest British Museum specimen 

 77 ; of my smallest 66 mm. Length of costa of fig. 5 

 in the plate 70, width of wing 37 mm. ; length of hind wing 

 50, width 31 mm. ; length of abdomen 29 mm (I regret 

 that I have inadvertently drawn the antennae 5 or 6 mm. 

 too short) ; length of thorax and head 22 mm. 

 Length of legs fist pair — femora 9 ; tibia 7 ; tarsi 10 mm. 

 j2nd ,, ,, 9; ,, 10; ,, 11 mm. 



(3rd ,, ,, 9 ; ,, 10; ,, 11 mm. 



The 3 3 of this species are suggestive of its being a 

 local variety of 0. Cassandra; but the 2 2 leave quite a 

 different impression, as will be shown in the descriptions 

 and iconography of that form ; but the two sexes almost 

 compel us to regard it as merely a small-sized local race of 

 Priamus. 



The types of this species are in the British Museum. 



The figures of the Plate are all drawn from specimens 

 in the author's museum. 



