AMBLTPODIA GHOUP OF THE LYCMNIBM. 73 



first two spots of the transverse band, which band begins on the upper discoidal nervule, 

 composed of six spots, the second shifted outwards, the third well inwards, fourth 

 outwards, fifth angular spot right inwards, detached and touching the sixth long spot 

 which extends up to the internal nervure; lobe largely developed ; lobe-spot black finely 

 edged above with metallic-blue scales, which extend slightly into the nervule interspace 

 beyond, above which is a broad dash of greyish scales; submarginal row obscure. 



2 . Paler, and the blue more violet in shade ; in the primaries the costa and posterior 

 margins are very broadly, and the apex yet more broadly, purplish black ; the secondaries 

 have exceedingly broad margins all round. Underside as in the male. In the Hewitson 

 collection is a female, labelled Cochin China, in which the blue is much brighter and 

 paler than usual. 



A. silhetensis can be separated from malayica mihi by the pattern beneath ; the 

 spots are all larger, the transverse band of the primaries is distinctly fractured (whilst 

 in my species it is not), and the transverse band of the secondaries is different, the 

 third, fourth, fifth, and sixth spots being twice fractured, but being in malayica almost 

 confluent ; there is also a distinct black spot in the lower median nervule space in my 

 species, absent in Hewitson' s, and his species has only a trace of a very sparse metallic 

 scaling, whereas mine has an abundance of bright blue metallic scales. From 

 nicevillei it is easily separable because of the violet colour of that speciess, and by the 

 pale greyish underside with the blackish spots standing out in strong contrast to my 

 species. 



This little group of four species allied to adatha Hew. has been difficult to arrange : 

 adatha Hew., malayica mihi, silhetensis Hew., and nicevillei mihi are all closely allied 

 yet quite distinct in the appearance of the underside; of malayica I have nine 

 specimens, and of nicevillei five, each constant in pattern : apha de Niceville is close 

 also, but I think there is no doubt that they are distinct from each other. 



A. arama of de Niceville falls as a synonym of this species. My friend Mr. de Nice- 

 ville had never seen this species, and from Hewitson's description he mistook the 

 insect. I have carefully compared his type of arcana with Hewitson's insect, and find 

 that they agree absolutely. 



Under the circumstances I have thought it well to describe these fully, more especially 

 as this last species is very rare and Hewitson's description is very inadequate. 



Arhopala xicevillki, n. sp. (Plate II. fig. 3, 6 ■) 



llab. Burma and Sikkim. 



Expanse, £ 56, 2 48-56 mm. 



c? . Upperside: both wings violet-blue, slightly lustrous, in certain lights dull 

 violet ; primaries with the costa and outer margins narrowly dark fuscous: secondaries 

 with the costa and abdominal margins broadly and the outer margin very narrowly 

 dark fuscous ; abdominal fold grey ; lobe highly developed, with a blackish spot ; 



vol. xvii. — part i. No. 10. — AiKjust, 1903. i. 



