NEW AND LITTLE-KNOWN BUTTERFLIES. 155 



Grose Smith and Kirby note : " The German authors regard this species 

 as either a local or seasonal form of Delias abnormis, Wallace (see our 

 figure Tachyris ahiormis, autea, vol. i, Pkmim pi. ii, figs. 6 and 7 ; 

 J>elias abnormis in text, which represents a female and not a male). It 

 may, however, be at once distinguished by the colouring of the under 

 surface. Herr von Mitis points out (Iris, vol. vi, p. 114) that the four- 

 branched [two-branched — L. de N.] subcostal nervure removes both 

 abnormis and euri/xardha from Uelias" There is no doubt whatever that 

 all the species of the genus Aoa are mimics of species of the genus 

 Delias, their structure being entirely different from that of Delias, 

 as they possess an additional subcostal nervule to the forewing. 

 When Dr. A. R. Wallace described Tachyris abnormis he knew 

 only the female ; had he known the male he would certainly have 

 put the species in the genus Fieris, group b. 



(3) Aoa euryxantha, Honrath. 



Delias abnormis, var. Gunjxantha, Honrath, Berl. Ent. Zeitocli., vol. xxxvi, p. 43.") 

 (1891); id., Staudinger, Iris, vol. vii, p. 117 (1894) ; Pinris e?<?'/a!«Mi/(a [sic !], Ober- 

 thur Etudes d'Eut., vol. xix, p. 6, pi. ii, figs. 9, male ; 7, female (1894) ; P. ahiormis, 

 Yivt. eur I/. vaiitka, 'Hagen,Ja,h.i\ dos Nass. Ver» fur Nafmr., vol. 1, p. 60,u. 35(1897); 

 Tachyris (Delias on plate) euryxanthi, Grose Smith and Sirby, llhop. Ex., pi. 

 Delias ^i, figs. l,i,femalc {\?:'y\'). 



Habitat : New Guinea. 



In my separata of Honrath's paper that gentleman changed in MS. 

 the generic name of this species from Delias to Appias. I possess a 

 single female of this species from Stephausort, German New Guinea, 

 which agrees with the published figures. Von Mitis remarks on this 

 species in Iris, vol. vi, p. 114 (1893). 



(4) Aoa dohertyi, Oberthiir. 



Pjeris fZo/jeir;^;/*, Oberthilr, Etudes d'Eut., vol. xix, p. 6, pi. ii, fig. 2, male (1894) | 

 ? Pieris doUcrtyana [sic I], Grose Smith [sic], Hageu, Jahr. desNass. Ver. flir Natur., 

 vol. 1, p. 61, u. 36(1897). 



Habitat : Ansus in the island of Jobi, Geelwink Bay, North- West 

 New Guinea. 



I have not seen this species. 



(5) Aoa discus, Honrath. 

 Delias discus, Honrath, Berl. Ent. Zeitsch., vol. sxx, p. 130, pi. v, fig. 4, female 

 0886). 



Habitat : Sekar, Western New Guinea. 

 Not seen by me. 



