Lepidoptera from Dutch New Guinea. 217 



Papilionidae. 



Papilio (^Troides) CfoUath, Ob. 



Ornithoptera goliath^ Obertliiir, Et. d'Ent. xix. p. 1, pi. iv. fig. 19 

 (1894). $. 



The ($ of tills species, which we now describe, was taken 

 by Messrs. A., C, and £\ Pratt during their expedition to 

 Waigeu in 1915^ and is unique. 



Compared witli allied forms, it is distinguished by reduc- 

 tion of the green areas on the fore wing. In size and general 

 appearance it is close to samson, Niep.*, from the Arfak. 

 The green costal band is indented below vein 7 as in 

 supremus, Rob. The posterior green patch is much invaded 

 by black, leaving a narrow distal portion, and inner marginal 

 stripe, and green dusting in the area below vein 2. The 

 hind wing is like samson, with the same relatively broad 

 green outer margin to the yellow area, and absence of black 

 scaling on the three discal spots. 



The underside of the fore wing shows increased black in 

 cellule 7 as compared with other forms. The small and 

 separate black submargiiial spots are as in samson. The hind 

 wing is like the figured samson, except that whereas this 

 form shows the whole base of cellule 8 scaled with green, in 

 goliath there is but a trace of green at the extreme base. 



In the Tring Museum there is a (^ from the New Guinea 

 coast opposite Waigeu, which, though not identical with the 

 goliath here described, very closely approaches it and samson. 

 More material is necessary to establish the racial distinctions 

 of these forms. We have found that many butterflies from 

 Waigeu are not racially different from specimens inhabiting 

 the Arfak and north coast districts when a good series is 

 compared. It is therefore probable, considering the greater 

 powers of flight possessed by these Papilio, that goliath as a 

 race extends over a wider range than the island of Waigeu. 



It is curious that the ? of goliath figured by Oberthiir is 

 much nearer the supremus form from German New Guinea 

 than it is to samson from the Arfak. 



Pieridaa. 



Delias ladas waigeuensis, subsp. n. 

 ^ ? . Differs from typical form in the reduced apical 



* Ornithoptera samson, Niepelt, Int. Eut. Zeit. vi. p. 281 (1913) (Arfak 

 Mtns.) ; Lep. Niep. p. 54, pi. iii. fig. 1, 6, pL vi. fig. 1, $ (1913). 

 Ann. (X- Mag. N. Hist. Ser. 8. Vol. xx. 15 



