1891.] LYCiENTD^E OF THE SOLOMON ISLANDS. 359 



Nacaduba, Moore. 



All the species here included in this genus have the first branch 

 of the subcostal nervure completely anastomosed with the costal 

 nervure for a more or less considerable distance, and it would seem 

 that this fact may prove to be of much value in determining closely 

 allied species. For instance, N. /elderi, Murray, is stated by 

 Mr. de Nic6ville (Butt. India &c. iii. p. 147), following Herr 

 Semper, to be a synonym of N. nora, Feld. ; but in N. nora (from 

 Sikhim) the first subcostal nervule is anastomosed with the costal 

 nervure for a distance rather less than equal to its length from the 

 subcostal nervure to where it joins the costal nervure, whilst in 

 N.f elderi it is anastomosed nearly four times this length. The 

 type of N. nora is from Amboina, and it seems possible that the 

 Indian insect is wrongly identified. 



Nacaduba astarte. (Plate XXXII. fig. 10 $ .) 



Lampides astarte, Butl. Ann. Nat. Hist. (5) x. p. 150 (1882). 



Alu I., near Shortland I. Fauro I. N.W. Bay, Malaita I. 



Several specimens ( $ ) agreeing well with Mr. Butler's type 

 in the British Museum from New Britain. 



There is a male of what I believe to be this species in Messrs. 

 Godman and Salvin's collection, which on the upperside is a silky 

 brownish blue, and on the underside has the conspicuous white 

 bands somewhat narrower than the type, and also the specimens 

 referred to above. It is from the Duke of York I. The specimen 

 figured is from Fauro I. 



Nacaduba plumb ata, sp. n. (Plate XXXI. figs. 3 d" , 4 $ .) 

 Male. Allied to N. macroplithalma, Feld. Upperside dark violace- 

 ous blue, with the margin narrowly, and cilia dark blackish brown, the 

 outer margin of primaries more rounded, and in that respect resem- 

 bhng N. herms, Feld., from Amboina. Underside light brownish 

 grey, with all the macular markings and lunules slightly darker and 

 bordered outwardly with pure white. The fore wing slightly, and 

 the hind wing extensively, suiFused with bright emerald-green scales 

 at the base. Primaries with a rather narrow band at the end of the 

 cell, and beyond that at about halfway between it and the outer margin 

 a continuous imbroken macular band of about equal width as far 

 down as the median nervure, below that gradually widening inwardly 

 to the submediau nervure ; beyond this band a submarginal row of 

 darker crescent-shaped lunules enclosing a marginal row of large 

 indistinct spots. Secondaries with a basal band, broadest on the 

 costa, another near the end of the cell, and beyond that, com- 

 mencing rather beyond the middle of the costa, a very irregular 

 much-broken macular band reaching to the inner margin, that part 

 of it which is opposite the short band near the end of the cell being 

 placed nearer to the outer margin, so that its inner border runs in a 

 line with the outer border of its continuations. Beyond this band a 

 submarginal row of darker crescent-shaped lunules enclosing large 



