424 



difference of locality. Those localities need not be far distant from 

 each other to produce the variety, if the sea divides them. 



10. On a New Species of the Family Papilic-nid^e from 

 Batchian. By George Robert Gray, F.L. & Z.S., etc. 



(Annulosa, Pis. LXVIII. LXIX.) 



In the Catalogue of the family of Papilionidce, which I formed on 

 the specimens contained in the Collection of the British Museum, I 

 enumerated several species that belong to the subdivision Ornitho- 

 ptera, which had previously been considered as only varieties of 

 Papilio priamus. It now falls to my lot to add another splendid 

 species (also supposed by some entomologists to form only a further 

 variety of that insect), sent by the indefatigable collector and natu- 

 ralist, Mr. A. R. Wallace, from the Island of Batchian, one of the 

 Moluccas. 



The beautiful golden colour of the insect about to be described, 

 has induced the discoverer to propose for it the name of Ornitho- 

 ptera crcesus, which I have adopted. I should otherwise have called 

 it after Mr. Wallace himself, as a slight record of the valuable ser- 

 vices he has rendered to entomology during his sojourn amongst the 

 Eastern Isles. I am further led to describe this insect as distinct 

 from any hitherto recorded, as, after a careful comparison with all 

 the others, many peculiarities can be pointed out, which will be in- 

 corporated in the following account. 



Papilio (Ornithoptera) CROZSUS. 



Primary wings deep black, with the anterior band widening to- 

 wards the middle, and this is of a golden orange-colour ; this colour 

 is also represented by an abbreviated band at the base of the inner 

 margin, and by a few scattered specks on the inner and outer margins. 



Secondary wings of a dull orange-colour, with some spots of kings- 

 yellow ; this difference of colour is occasioned by the semitrans- 

 parency of the more decided spots of the under surface of the wings 

 when the insect is held against the light; the base, subcostal and 

 medial nervures, first subcostal nervules, and the narrow edge on the 

 outer margin are deep black. A black spot is sometimes found 

 between the second and the first discoidal nervules. 



The under surface of the primary wings is most like that of 

 Ornithoptera richmondia in the form of the markings, but they 

 are of a rich golden-green. 



The under surface of the secondary wings also closely approaches 

 that of Ornithoptera richmondia ; but it is of a golden-green, with 

 a lengthened spot of rich kings-yellow above the black spot be- 

 tween the costal nervure and the first nervule, and a small spot 

 below the black spot ; the same kind of yellow spot above and below 

 the black spot in each space between the first and second nervules 



