29 



7. JuvENTA Cram. (PI. XIV, fig. 24a, 24^, 24c). 



Cramer. //, /. 149, //. 188 B (1779) Papilio Juventa. 



HoRSFiELD, Cal Le/>., J\f. E. I. C, pi. 3, //>. 7, 7a (1828). Euploea 

 Moore, Ibid., i, /. 122, //. 4, //^. 4, \a (1857). . . Danais 

 Snellen, Tijciscln: v. EnL, XXI, p. 6 (1877), XXXIX, 



p. 44 (1896) 



Distant, Rhop. Mai., p. 407, tab. 39,./4'. 4 (1882 — 1886). Radena „ 

 Moore, Proc. Zool. Soc. London, 1883, /. 224, //. 39, 



Jig. I ,, Exprompta. 



Fruhstorfer, (Seitz, Grossschvi. d. Erdc), p. 212,//. 



78(5 (i9'o) Danais Juventa. 



As regards sexual characters this species agrees with D. Similis ; the form 

 of wings also is nearly the same, the hind-wings, however, being more rounded. 

 For ^/3 they are light in colour with dark veins, while in Similis they are dark 

 with light longitudinal streaks. Cramer's figure is of too deep a blue, while 

 Distant's is fairly good. 



W. J. Batavia (3—14); Depok (95); Buitenzorg (265); Tjampea (160); 

 vicinity of Felabouan Ratou or Wijnkoops Bay on the south coast (+ 1 50) ; 

 Soukapoura, in the south of the prov. Prayangan. 



C. J. Jokjokarta (113); prov. Semarang (300) {Jacobson); Nousa Kam- 

 bangan {Jacobson). 



E. J. Banyoupoutih (45) in the prov. Frobolingo; Kediri (64) ; Jember (98) 

 in the prov. Besouky ; in the prov. Banyouwangy and in the prov. Madoura. 



This species is extremely common at Batavia and elsewhere in the lower 

 lying districts of Java. I even found it on the coral islet Edam, situate one 

 hour's distance north of Batavia. The larva occurs on Ij'abe djawa (Fiper 

 LoNGUM L.); melati longkeng (Fergularia Odouatissima Sm.) ; on kelambennan 

 (Gymnema sp.}) ; on a climber known as bcbankcan and on a plant called j^rawa;/ 

 oyot. It is dark red-brown in colour covered with numerous milky-white dots 

 and transverse streaks. The head is a glossy black. From the back of the 

 second thoracic segment issues a longer and from that of the penultimate 

 abdominal segment a shorter pair of filiform processes, the anterior pair being 

 somewhat bent forward. These processes are black except at the base where they 

 are orange coloured. Sometimes several larvae are met with on the same plant. 



The pupa is of a vegetable green with a black caudal hook; a row of 

 black dots occurs on the dorsal boundary between thorax and abdomen and a 

 few similar dots are distributed over the back. Those which pupated in a dark 



