New Lepidoptera from Dutch New Guinea. 379 



indistinct reniform spot. Beyond the cell a white band, well- 

 defined on the costa but for the most part scaled with brownish, 

 curving outwardly and ending indistinctly on inner margin, being 

 interrupted at vein 2 by the ground-colour. A well-marked dark- 

 bro\^Ti dentate line edged with white distally runs partly in the white 

 band from the costa and then obliquely to inner margin. The 

 median area between the two lines is scaled with greenish. A sub- 

 marginal crenulate lilac line from vein 10 to inner margin and 

 bordered distally by some dark and indistinct triangular spots which 

 almost touch the dark inner edges of a marginal row of white dots. 

 Hindwing with a black margin about 6 mm. wide and narrowing to 

 the anal angle. Rest of wing pale yellow, inner margin orange-yellow. 



Underside of forewing with a smoky-brown ground-colour, paler 

 at the apex, at base yellowish-white. A cream-coloured square 

 spot at end of cell, a small spot at base of cellule 2, a cream-coloured 

 post-discal band from costa to below vein 2, curved outwardly. 

 Hindwing paler than above. 



Head and palpi greyish -brown; second joint of palpus with a 

 dark lateral line, first joint longer than in other species of the genus, 

 measuring 2 mm. Thorax chocolate-brown mixed with grey, and 

 below grey-black. Abdomen orange-yellow above, smoky-brown 

 below, anal tuft black. Legs grey-black. 



Length of forewing : 30 mm. 



(^ $. The description is made from the $, as the (^ 

 specimen is too worn. 



Lymantriadae. 



Before recording descriptions of the two forms which 

 follow, a preliminary note will be necessary regarding two 

 genera described by Mr. Bethune-Baker in Nov. Zool., 

 vol. xi, 1904. 



Pseudodreata, type strigata, B.-B. ((^), p. 371. 

 Cycethra, type aroa, B.-B. (9), p. 393. 



The distinguishing characters given of these genera as 

 exemplified in their types do not differ from the structure 

 found in Colussa, Wlk. The $ ? of this genus are all 

 remarkable for the absence of a frenulum, though it is 

 present in the (^ ^. 



The $ of the form of strigata described hereafter, agrees 

 in its structure with the $ of a form corresponding to the 

 $ of Cycethra aroa. 



In view of these determinations we believe it is necessary 

 to sink both genera under Colussa, Wlk. This genus 



