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V. New Butterflies and a Moth from Biak. By J. J. 

 JoiCEY, F.L.S., F.E.S., and A. Noakes, F.E.S. 



[Read February 3rd, 1915.] 



Plates XXI— XXVIII. 



The Island of Biak is the largest of the Schouten or Misory 

 Islands which lie outside Geelvink Bay, North New 

 Guinea. It was first explored entomologically by Mr. W. 

 Doherty, who visited it in 1892. He was only able to 

 stay a short time, and in the bad season. His collection 

 was therefore a small one, but it contained several new 

 and distinct forms. The island was not again visited by 

 collectors till Messrs. A. C. and F. Pratt went there during 

 the year 1914. They were able to remain over two months 

 and make extensive collections. The island seems pecu- 

 liarly rich in specialised forms, and the species show as 

 much afl&nity with those inhabiting the Moluccas and 

 Bismarck Archipelago as with New Guinea forms. 



The present paper contains thirty-one forms which we 

 regard as new, and several of these are quite distinct ; in 

 addition, we record the other sex of four species which 

 had not previously been known in both sexes. 



We are indebted to the Lord Rothschild and Dr. K. 

 Jordan for much kind help, and the opportunity afforded 

 of examining specimens in the Tring Museum, 



The specimens were all collected in May and June, 

 1914, and obtained in the southern part of the island 

 called Bosnik. 



We hope to be able to publish later a complete list of 

 the butterflies known from this island. 



Papilionidae. 

 1. Papilio Othello obscurata, $ forma nov. 

 (Plate XXI, fig. 1.) 



Near melia, Roths., from Mefor. Differs from this in the much 

 reduced red spots on the hindwing above. On the underside the 

 discal spots are washed out and the red submarginal spots reduced, 



TRANS. ENT. SOC. LOND. 1915. — PART 11. (AUG.) N 



