neio Species o/'Ornithoptera. 195 



On the underside this form does not present any features 

 sufficiently distinct to distinguish it from aruana ; the upper 

 surfaces, however, are remarkably different in colour from that 

 species, though the arrangement of the markings is nearly 

 the same. The rich golden-green of aruana is replaced in 

 this species by the brilliant green-blue, and the singular 

 ])atcli of vegetable- or aruana-QXQQw on the posterior wing, as 

 described above. By contrast with the green-blue this colour 

 seems most like that o{ ijegasus (Felder), while the gradations 

 of colour and opalescent tints in certain lights link it with 

 Urvilliana and croesus on the one hand and jrnamus and 

 pronomus on the other. Possibly it is only a remarkable 

 transitional variety of aruana, but at present it is sufficiently 

 distinct to merit a distinguishing name ; and it goes far 

 towards enabling us to link together the whole of the members 

 of the priamus-^xou^ and regard them as local forms of the 

 typical species priamus. 



? . Wings on both surfaces tawny brown, richer on the 

 underside. Primaries with a subquadrate oblique patch 

 within the discoidal cell sordid white, the pseudoneura quite 

 visible ; without the cell are eight elongate separated marks 

 of the same colour, the first within the third and fourth sub- 

 costal branches ill-defined in outline, short and acuminate, 

 the second shorter and broader, the third a long hastate mark 

 filling one half the space between the nervules and containing 

 a cuneifornr spot ; the fourth is sliorter, with a larger cunei- 

 form spot ; the fiftli consists of three white spots of different 

 forms, widely separated by the brown ; the sixth is divided 

 into two of unequal size ; the seventh is divided into a long 

 hastate and an irregular-shaped small mark ; the eighth is 

 twin-spotted, with a faint spot higher up ; the exterior 

 margin with small whitish scalloped spots. The sordid 

 colour is caused by the white being all covered with grey 

 scales. Secondaries with the submarginal band white and very 

 broad, occupying the greater part of the disk between the 

 nervules; four divisions, or those bounded by the second 

 subcostal and the third median branches, containing midway 

 a moderately-sized orbicular tawny brown spot, the upper 

 one being the largest ; each of these divisions is sinuate 

 at the outer end, the indentations being most numerous 

 in the upper two^ and all are pointed or acuminate at the 

 ends nearest the cell. Between the first and second sub- 

 costal nervules is a separated sinuate spot or a portion 

 of the white band cut off' by the brown of the wing ; below 

 the black orbicular spots the white becomes more tawny, 

 and between each of the divisions are indications in 



