392 APPENDIX. 



between the base and the band a narrow bluish grey line 

 extends across the wing, and behind the band, at an equal 

 distance, there is another short, waved, bluish grey line 

 running down to the inner margin. The margins of the 

 band and spots are bluish grey. The lower wing is 

 narrowly black at the base, with a transverse band of a 

 king's yellow colour ; this is the widest on the inner edge, 

 near its outer end there is an angular black spot; the 

 apical half of the wing is black, with numerous king's 

 yellow spots arranged in two lines, two spots about the 

 middle connected and notched with black. Head, thorax, 

 and base of abdomen black, rest of abdomen of a king's 

 yellow colour. 



Mr. Macgillivray took two specimens of this fine species. 

 One flew on board when the ship was to the north of Cape 

 Weymouth ; the other was taken at Cape York : the 

 figure is of the natural size. 



Cocytia Durvillii, Boisd. Monog. des Zygenides, t. 1, fig. 1. 



This is an abundant species in the Louisiade Archi- 

 pelago, flying on shore in the daytime among trees (as 

 D'Urville remarked it did in New Guinea) ; and it fre- 

 quently came on board the Rattlesnake, even when dis- 

 tant from the shore two or three miles. It flies heavily 

 like a moth, and is easily caught. This beautiful insect is 

 one of the finest found by Mr. Macgillivray. Only tlu-ee 

 specimens are recorded : those discovered by Admiral d'Ur- 

 ville, and described by Dr. Boisduval; Mr. M. brought 

 home two, deposited with the rest of his collection in the 

 British Museum. 



