Dutterjlies from the Pacific Islands. 517 



Thysonotis hengis. 



Male. — Upperside re8emblc9 T. WaUacei, FeliL, but the 

 wings are brighter blue and the central irroration of white 

 scales on the anterior wings is less conspicuous ; on the poste- 

 rior wings the white band before the middle is narrower. 



Underside differs little from T. Wallncei, but on the ante- 

 rior wings the costal and apical black area is narrower, as 

 well as the white band on the posterior wings. 



Female. — Upperside. Both wings darker brown than in 

 T. Wallace!, being nearly black : on the anterior wings the 

 dark costal band is bounded at the base by the median nervure, 

 while in T. Wallacei it extends at the base broadly to the 

 inner margin. On tiie j)ostcrior wings the white subbasal 

 area is considerably less extended. 



On the underside of the posterior wings the subbasal white 

 band is narrower, the outer black area being broader ; the 

 submarginal blue band is wider and the black spots in it are 

 more elongate ; the cilia on both wings are less conspicuously 

 white. 



Exp. of wings 1| inch. 



Hah. Kapaur, S.W. Dutch New Guinea {Doherty). 



In the collections of the Hon. Walter Kothschild and 

 Mr. Grose-Smith (types). 



Described from a long series of both sexes. 



It is a considerably larger insect than T. Wallacei, and 

 the wings are broader and rounder. Tiie female resembles 

 T. vidua, Grose-Smith, but the white spot at the outer angle, 

 and the subcostal blue streak on the upjjerside of tiie anterior 

 wings of that species are absent, and the white area on the 

 posterior wings is less extended and less sharply defined than 

 in T. vidua. 



Holochila cequalis. 



Male. — Upperside. Both wings resemble //. refusa, Grose- 

 Smith, but blacker brown. On the anterior wings the white 

 area is more extended over the cell and beyond it, and the 

 blue suffusion at the base of both wings of H. refusa is very 

 slightly represented by dull slate-coloured scales which are 

 less extended than in H. refusa. 



Underside. The outer dark brown marginal bands of both 

 wings are twice as broad as in H. refusa. 



Female. — Upperside resembles the male, but is browner 

 and without any bluish suffusion. 



