New Forms of the Genus Delias (Pieridae) 311 



form and with the same tendency to increased black scaling at the apex. 

 Five out of the six specimens have a yellowish tint. 



Underside of fore wing with distal black as above. Discal area 

 more or less laved with straw-yellow. Hind wing as in 3 . 



Menoo Eiver, 3,500 to 5,000 feet, November to January, a small 

 series of 3 3 and five ? ? ; Mount Kunupi, 6,000 feet, November, 1 ? . 



15. Delias ligata- Jord. weylandensis subsp. nov. 



Both ligata Jord. and hummeri Jord., occur together on the Aroa 

 River in British N. Guinea. Typical ligata is also found in the Arfak 

 region of Dutch New Guinea from whence we possess also two speci- 

 mens like hummeri which agree with two specimens from the Weyland 

 Mountains. We have also from here some specimens showing a 

 break in the red submarginal band, and two specimens in which 

 this band is only represented by some scattered red scales. It 

 seems therefore that hummeri and ligata may be forms of one species. 

 It is curious that the two hummeri specimens from the Arfak are 

 like those from the Weyland Mountains which we include under 

 the present subspecies. It may be that after the development of 

 the Weyland race, this form became distributed to the Arfak already 

 occupied by the present form. 



3 . Upperside of fore wing with narrower black distal area than in 

 the type form. 



Underside of fore wing with distal black as above. Hind wing with 

 white discal area extended into cellule 2 and to a greater extent in 

 cellule 3 than in the type form, and as much as in hummeri. 



? . Upperside of fore wing mostly w T ith narrow distal black area. 



Underside of fore wing with white area extending into cellule 4. 



Ab. 1. Hind wing below with red submarginal line broken on 

 vein 4. Six 3 3 , three ? ? . 



Ab. 2. Red submarginal line very thin and without black edging. 

 One 3 . 



Ab. 3. The red submarginal line between veins 4 and 7 represented 

 by some scattered red scales. Two 3 3 , one ? . 



Ab. 4. The red submarginal line between 4 and 7 entirely absent, 

 = hummeri Jord. One 3 . 



This race occurs as an aberration in the Arfak Mountains, mixed 

 with typical ligata. 



Menoo River, 3,500 to 5,000 feet, November to January. A series of 

 both sexes. Mount Kunupi, 6,000 feet, December to January. A series. 



