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J. The 3rd subcostal nervule emitted close to the apex of the discoidal cell of the anterior wing. P. Vandepolli, 

 Honrathiana, Naias, Amphrysus, Nereis, Cerberus, Andromache, Sumatrana, Rhadamantus (males) ; Critonoides- 

 var., Plateni, Staudingeri, iEacus (females) ; T. Brookeana, P. Hippolytus, and vars., Dohertyi, Iris, Fasciculatus, 

 Darsius, Riedeli (both sexes) ; Helena, var. Grose-Smithi, $ . 

 ja. The third subcostal nervule emitted a little below the apex of the discoidal cell of anterior wing. Andromache, 

 Cuneifera (females) ; Hippolytus v. cellularis (male), 

 jb. The 3rd subcostal nervule emitted a little above the apex of the cell. P. Critonoides, Staudingeri, Neomiranda 

 (males) ; Hippolytus v. cellularis, Vandepolli, Criton v. Felderi, Iris, Melpemona, Hycetus, Andromache, 

 Hephaestus, (females) ; Plato, Criton, Naias, Papuensis, Amphrysus and its varieties, Nereis, Pompeus, 

 Rhadamantus, iEacus, Helena, Minos, Haliphron (both sexes). 



8. Anterior wings of the $ S with no sexual stigma, the genera Trogonoptera and Pompeoptera. 



9. Discoidal cell rather long and narrow, the <? and ? of T. Brookeana, Trojana, P. Naias, Iris ; the $ of 



Neomiranda, Miranda, iEacus, and Rhadamantus ; and 2 of Andromache, Sumatranus, Magellanus and 

 Hephaestus. 



ga. Discoidal cell broad, the $ and 2 of P. Darsius, Helena (type form), Hippolytus and vars. 



gb. The cell half the length of the wing, the $ of P. Hippolytus and vars., Plato var., Criton, Ruficollis, and 

 Flavicollis, Amphrysus, Nereis, Riedeli ; the <? and 2 of Papuensis, Pompeus, Plateni, Dohertyi, Cerberus, 

 Minos and Darsius ; and the 2 of Cuneifera, Hycetus, Rhadamantus, Andromache, Hephaestus, and Helena. 



10. Pseudoneura, 4 in number, and only slightly visible. T. Brookeana $ 2 , Trojana $ ; The $ of Brookeana and 

 vars., P. Vandepolli, Honrathiana, Criton, Critonoides, Papuensis, Melpomona, Amphrysus and vars., Nereis, 

 Pompeus, Cerberus, Plateni, Dohertyi, Iris, Staudingeri, Miranda, Neomiranda, Andromache, Magellanus, iEacus, 

 Rhadamantus, Darsius, Minos, Helena and vars., Riedeli, Plato, Fasciculatus, Naias, and Haliphron. 



iofl. Pseudoneura sufficiently visible, the 2 of T. Trojana, P. Plato, Critonoides, Cuneifera, Plateni, Iris, Dohertyi, 

 Fasciculatus, Staudingeri, Miranda, Andromache, Amphrysus, Helena, Darsius, and Minos. 

 \ob. Pseudoneura strongly emphasised, the 2 of Magellanus, Hycetus, Pompeus, Nereis, Flavicollis, Papuensis, 

 Melpomona, Naias, Criton, Honrathiana, Vandepolli, Hippolytus and vars., iEacus, Rhadamantus, and 

 Haliphron. 



ioc. Pseudoneura 4 in number, the 1st and 2nd starting at the base of the cell, the 3rd at the base, and the 4th 

 as a branch at half way from the base. All the species of both genera ; but in the males of some species 

 the 1st pseudoneurus is nearly or quite obsolete ; the distance between each is generally equal, but unequal 

 in a few, and in some the two branches 3, 4 are very close together. 



B.— POSTERIOR WINGS. 



1. The Costa arcuate, and the 2 incurved near the apical angle, P. Hippolytus, and Criton. 



la. More or less strongly arcuate, but not incurved near the apical angle, all the other species of the two genera, 

 and in both sexes. 



2. With obscure dark abdominal fringe, or no fringes, females of Vandepolli, Ruficollis, iEacus, Rhadamantus, Nereis, 



Pompeus, Hycetus, Magellanus, Riedeli, Darsius, Minos, and Helena ; almost entirely absent of the other 

 females. 



2a. With sienna red abdominal fringe, Amphrysus and varieties, and Andromache. 

 2b. With rather prominent dark abdominal fringe, all the other species of both sexes. 

 2c. The fringe is generally shorter than in the genus ornithoptera. 



3. Discoidal cell elongate and rather narrow, T. Brookeana and Trojana ; P. Plato, Nereis, Riedeli, and Helena. 

 3#. Cell elongate and rather broad, P. Darsius, and Plateni. 



36. Cell very broad, P. Hippolytus and vars. 



3c. Cell broad but not elongate, all other species. [The form of the cell varies in the different species.] 



4. The Pseudoneura generally invisible, but 3 or 4 in number. In Hippolytus, 3 in number, the central one originating 



at the base of the cell, and the 1st and 3rd branching in each side half way of its length. 



