318 New Forms of the Genus Delias (Pieridae) 



24. Delias discus Honr. 



Berl. Ent. Zeit., xxx, p. 130, t. 5, fig. 4 (1886) (Sekar). 



A series of this species from Nomnagihe presents certain differences 

 from specimens found in the Snow Mountains. On the fore wing 

 below, the subapical spots are mostly larger, and the median white 

 band extends to vein 4 and is nearly constantly broader. On the hind 

 wing the band is paler yellow, narrowed in cellule 6 where some white 

 scaling is intermixed. 



As perhaps the only constant difference is in the paler colour of 

 the hind wing band, we hesitate to separate this form, but the 

 tendencies to differentiation are worth noting. There are six $ S 

 from the Snow Mountains, one S labelled "Brit. N. Guinea" 

 (probably erroneous), and four $ $ without localities in the Joicey 

 collection. This material is clearly not enough to decide about any 

 constant differentiation, and more specimens may exhibit similar 

 characteristics to those from Geelvink Bay. 



25. Delias albertisi Honr. albiplaga subsp. nov. 



This form is distinguished by the white instead of yellow patch on 

 the hind wing above. Whilst in citronawe have a yellow representative 

 of a western species, in albiplaga we have the yellow colour of a north- 

 eastern species changing to white. 



$ ? . Upperside of hind wing with anal patch white, rarely 

 extending slightly into the cell or beyond vein 3, the area in 3 smaller 

 than in the type form, and the area in 2 mostly shorter. Underside 

 of hind wing with the black discal margin a little broader than in the 

 type form. 



Menoo Valley, 4,000 to 6,000 feet, November to January, only on 

 Mount Kunupi. A series of both sexes. 



26. Delias niepelti Eibbe, arfakensis subsp. nov. 



This represents a distinct race characterized by the white area of 

 the fore wing extending farther beyond end of cell than in meeki 

 K. and J. 



3 . Upperside of fore wing with narrower black apical area than 

 in niepelti, but below vein 4 as broad as in this form. Hind wing as 

 in the type form. 



Underside of fore wing with yellow area extending well beyond end 

 of cell, its edge sharply defined and slightly curved anteriorly. Sub- 



