BUTTERFLIES OF SAMOA AND SOME NEIGHBOURING ISLAND-GROUPS. 9 



distribution through the Indo-Malayan region, and occurs in many races in 

 the islands of the Pacific. The present race appears to be the smallest known 

 form of the species. 



The eggs, which are laid singly on the underside of a leaf of Tylophora 

 samoensis A. Gr. (Asclepiadaceae), are creamy white and barrel-shaped, with 

 about 14 longitudinal ribs, each of which is joined to its neighbour by about 

 19 narrow transverse • bars ; the height is about 1*35 mm. and the diameter 

 0*76 mm. 



The head of the larva (PI. IV, fig. 1) is black, except two broad transverse 

 bands and the labrum, which are white. The body above the spiracles is white, 

 with one broad and two or three narrow black transverse bands on each seg- 

 ment ; below the spiracles the colour is orange-brown. Spiracles, legs and 

 prolegs are black. There is a pair of black fleshy filaments on the mesothorax, 

 and another pair on the eighth abdominal segment. Eggs and larvae were 

 found in June and September. 



The pupa (PI. IV, fig. 2) is much more compressed in shape than that of 

 D. archippus, and of a beautiful translucent jade-green, totally different from 

 the waxy green of that of archippus ; the girdle and a few minute dots on the 

 dorsal surface are golden, and the cremaster and two small spots on the ventral 

 surface black. 



2 (b). Danaida (Tirumala) melissa tutuilae, ssp. n. 

 Danais melittula ; Schmeltz, p. 175. 



Rebel, 1910, p. 415. 



Differs from melittula in both sexes owing to its much larger size and more 

 extensive blue markings. The latter feature is best seen in the state of develop- 

 ment of the hook-shaped marking formed by the coalescence of the blue streak 

 along the inner margin of the forewing with the blue spot external to it, and of 

 this latter with the spot internal to it and anterior to the streak. The extent 

 of this coalescence varies in both the forms, and the hook may be " Complete " 

 (PI. II, fig. 1), "Incomplete" (PI. II, fig. 2), or "Absent"; I call it incom- 

 plete when the streak is attached to the external spot, but the latter is not 

 joined in turn to the internal one, or when the two spots are joined to one 

 another but not to the streak. In a series of one hundred and twelve specimens 

 of D. m. melittula from Upolu and Savai'i, the hook is complete in seventeen 

 males and nine females, incomplete in seventeen males and five females, and 



