1892.] THE lyCjEnid^ of the south pacific. 439 



seen. Mr. Miskin does not refer to it, so that probably it is known 

 under another name in Australia. 



Macaduba mallicollo, sp. n. (Plate XXVII. fig. 18.) 



Lampides argentina, Butl. {nee Pritt.), P. Z. S. 1875, p. 616. 

 tS . Upperside. Fore wing light violaceous blue, whitish in the 

 cell and towards the outer margin, which, together with the costa, 

 is rather broadly uniform blackish brown, the border extending 

 into the middle of the cell. Hind wing greyish brown, darker 

 towards the costal margin, and violaceous towards the base. A 

 marginal row of distinct black spots extending from the apex to the 

 anal angle, bordered inwardly with a row of indistinct grey crescent- 

 shaped lunules, and outwardly with a clear white line interrupted by 

 the nervules ; beyond this a blackish marginal line. Cilia greyish, 

 darker at each nervule. 



Underside pale ashen grey, with the white-bordered markings 

 distinct and shghtly darker than the ground-colour. Having much 

 the appearance of N. euretes, 2 (P. Z. S. 1891, pi. xxxi. f. 7), but 

 with the submarginal row of lunules on both wings less distinct, 

 smaller, and more triangular. Head, thorax, and abdomen con- 

 colorous with wings. Antennae black with white spots. 



A short black tail tipped with white on the lower median nervule. 



Expanse \\ inch. 



Mallicollo I., New Hebrides {Woodford) {Mus. G. ^ S.). Tanna 

 I., New Hebrides {B. M.). 



The male of this insect in tiie British Museum is a uniform 

 violaceous blue, with very narrow linear brown borders. 



This species does not appear to me very closely allied to any 

 other, but is perhaps nearest to N. dion on the upperside of male 

 and female. 



Mr. Butler has identified this insect with Acrop. ? argentina, 

 Prittwitz, from the Samoa Islands, but I feel confident that that 

 species is a Jamides, which is also Mr. Miskin' s opinion, as he 

 places it as a variety of L. (= J.) astraptes, Feld. 



Nacaduba dion. 



Polyommatus dion, Godt. Enc. Mdth. ix. p. 679. n. 191 (1823). 



Lampides perasia, Butl. P. Z. S. 1875, p. 616. 



New Hebrides (G. F. Mathew) {Mus. G. Sf S.). Tanna I., New 

 Hebrides {B. M). 



Both sexes of this insect agreeing well with Australian specimens ; 

 two females, however, have slightly narrower black borders and con- 

 sequently a larger area of white, whilst another is quite normal. 



Lyceena perasia, auct. {nee Felder), from Australia, in my opinion 

 equals N. dion. I have not seen a specimen from Amboina, whence 

 Felder's type was obtained, but his figure seems to point to a form 

 which has the brown borders on the underside much broader than 

 any Australian specimens I have seen, and consequently a less extent 

 of white. 



