1892.] THE LYC^ENID^ OF THE SOUTH PACIFIC. 445 



but as it is well known under the name 0. platissa I do not care to 

 suggest another alteration in its synonymy. 



The specimens I have examined show considerable variation in 

 size (some specimens from Samoa Islands being little more than half 

 that of others from the New Hebrides) and also in coloration, 

 some which I consider typical having a greyish-black outer marginal 

 line only, whilst others have the apex and outer margin broadly 

 greyish. The undersides also show considerable differences — some 

 having the spots and bands brownish and distinct, in others, again, 

 they are almost concolorous with the ground-colour of the wings. 

 These variations cannot be traced to any particular locality, as a 

 series from each shows all intermediates and extremes. 



Tarucus, Moore. 

 Tarucus plinius. 



Sesperia plinius, Fabr. Ent. Syst. vol. iii. pt. 1, p. 284 (1793). 



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



Mr. Miskin considers that the Australian insect should stand 

 under the name pseudocassius, Murray. Such being the case, he 

 must admit that T. plinius and T. pseudocassius occur together, as 

 we possess specimens from India and Africa agreeing exactly with 

 others from Australia. Mr. Mathew obtained a number of this 

 insect in the New Hebrides, but I have seen it from none of the 

 islands eastwards. 



There is in Messrs. Godman and Salvin's collection a single female, 

 formerly in Mr. Mathew's collection, labelled New Britain. 



PoLYOMMATUS, Latr. 



POLYOMMATUS B^TICUS. 



Papilio bceticus, Linn. Syst. Nat. i. 2, p. 789 (1767). 



Lyccena taitensis, Boisd. Voy. Astr., Lep. p. 77 (1832). 



Lampides taitensis, Butl. P. Z. S. 1876, p. 252. 



Espiritu Santo I., New Hebrides (Woodford). New Hebrides 

 {Mathew). Tahiti, Society Is. (Boisduval). 



The specimens before me agree exactly with some in our collection 

 from W. and S. Africa, but are smaller and less densely covered with 

 coarse scales than is usual in European examples. There can, I 

 think, be no doubt that Boisd uval's name is a synonym, 



Arhopala, Boisd. 



This genus apparently ends its range in the Solomon Islands, as no 

 species of it has been recorded to the eastward. 



Deudorix, Hew. 



This genus, although well known to inhabit N. Australia and Nevir 

 Guinea with its adjacent islands, is, so far as I am aware, recorded 

 Proc. Zool. Soc— 1892, No. XXXI. 31 



