Papilionulce. 93 



In the fore-wings, the portion of the post-costal vein, 

 between the origin of its second and third branches, is 

 of nearly equal length, with the spaces between the third 

 and fourth branches ; the third branch arises at a small 

 distance beyond the cell, and the terminal portion of 

 the post-costal vein, beyond the insertion of the fourth 

 branch, is three times the length of the space between 

 the origin of the third and fourth branches: whereas, 

 in P. Nox and P. Erebus, the space between the third 

 and fourth branches, is much elongated, and occupies 

 nearly two-fifths of the length of the post-costal vein 

 between the end of the cell and the tip of the wing, and 

 the space between the second and third branches is only 

 two-thirds of the length of that between the third and 

 fourth branches. 



The wings, both above and below, are black, strongly 

 marked with longitudinal cream-coloured stripes on 

 either side of the longitudinal black veins, the discoidal 

 cell is also marked with a number of similar lines less 

 decidedly. The hind-wings are also similarly marked on 

 each side of the longitudinal veins, the incisures of the 

 hind-wings are not so deep as in P. Nox, the four central 

 ones being marked by small triangular cream-coloured 

 spots, the face, sides of the thorax, and extremity of the 

 body are clothed with scarlet scales. 



The female of P. Nox (P. Memercus, Godart) is brown 

 above, with the apical half of the fore-wings strongly 

 marked with brownish-white scales on each side of the 

 veins, the hind- wings being uniformly brown on both sides. 



The female of P. Erebus is black above ; the veins, 

 especially at the apex of the fore-wings, margined with 

 white scales, becoming gradually more sooty towards the 

 inner angle, and the under wings are raven-black, each 

 of the spaces between the veins, beyond the cell, bearing 

 a large triangular jet black spot. 



The female of P. Noctis, Hewitson, Proc. Zool. Soc. 

 1859 (p. 423, pi. LXVI. f. 5, 6) , is described thus :— 

 *' upper side dark brown ; all the nervures, except those 

 which enclose the cell, margined with lighter colour, 

 with white near the apex of the anterior wing and the 

 outer margin of the posterior wing ; posterior wing 

 with a band of dirty white near the outer margin ; outer 

 margin of both wings light yellow. Underside as above, 

 except that the margins of the nervures of the anterior 



