302 NOVITATES ZOOLOGICAE XXVI. 1919. 



broken, sometimes with extra light spot below dorsal tubercle on segment 9, 

 and more light ochre-coloured tubercles. 



Pupa apple-green, grey-green dorsaUy, resembling green form of lysander. 

 Male butterfly characterised by small, nearly round patch of iridescent emerald- 

 green scales near inner margin of forewing, and four intensely brilliant crimson 

 spots, grouped together in a triangle of deep magenta on the hindwing. 



Abdominal sheath silvery brown with line brown hair. 



Female charaoteri-sed by broad forewing, rounded at the apex, and possessing 

 a large and much-suffused white patch invading the cell. Hindwing adorned with 

 six well-developed crimson spots, which nevertheless lack the intensity of the 

 male coloration. 



P. sesostris sesostris (pi. ii. fig. 2, pi. iii. fig. 7). 



A very elegant species, thought at first to be rare, but frequently observed 

 since on all sides of Para. The larvae, from which lovely fresh specimens of 

 both sexes have been reared, have indeed been taken quite commonly, and 

 have invariably been found feeding on Aristolochia huberiana, a new species closely 

 aUied to consimilis, and named at South Kensington after the late-lamented 

 Director of the Para Museum, Dr. Huber. 



Localities. The Para Bosque, Canudos, Utinga, Ilha das Ongas, etc. Two 

 forms of the full-grown larva are figured, the commoner being of a Naples yellow 

 or ochreous tint, freckled with black, the other a pale maroon with deep maroon 

 tubercles. 



Special features. 1. The dorsal tubercles are thick and blunt, and of dark 

 coloration, except those on segments 8 and 11, which are invariably light. 

 2. By way of compensation, the sides of these two segments, 8 and 11, are always 

 the most heavily marked with black or dark maroon. 3. The dark tubercles 

 are always darkest in front, and are given the appearance of added height by the 

 dark streaks which obliquely lead up to them. 4. There is a black triangular 

 patch on the anal flap, not noted in others of the group. 



Male butterfly : forewing broad and of an intense velvety black, with a 

 large and very brilUant patch of iridescent emerald-green scales near the base, 

 zigzagged outwardly into three points. Hindwing uniformly black, some speci- 

 mens only showing vestigial traces of one or even two brilliant crimson spots 

 in the lowest part of the wing near the fringe. Four plain red spots are revealed 

 on the undersurface. Abdominal sheath very broad and thickly lined with 

 cream-white wooUy scales, like a handsome fur cloak. Just above this lies a tuft 

 of long silvery hair, which on setting readily opens out into the form of a beautiful 

 plume. 



Ground-colour of female dark brown rather than black, with an irregular 

 and rather small cream-coloured patch, never white, situated near the inner 

 margin of the forewing far below the cell. Hindwing adorned with four large 

 cherry-red spots, coalescing to form a single patch near the outer margin, while 

 two much smaller spots of the same colour are isolated at a distance, breaking 

 the usual continuity. 



P. vertumnus diceros (pi. ii. fig. 3, pi. iii. fig. 5). 



Never an abundant species in Para, both sexes having been taken 

 as often as aeneas, and then generally at the flowers of Inga or Palicoure<i 



