164 INSECTS OF SAMOA. 



our previous experiences of it. The larva is said to feed on Convolvulaceae, and 

 to be olive-fuscous with small dorsal prominences on the second and eighth 

 abdominal segments. 



Nadagara Walker. 



List Lep. Ins., xxiv, 1092, 1862. — Hampson, Faun. Brit, hid., Moths, iii, 193, 1895. — Turner, 

 Proc. Linn. Soc. N. S. Wales, xliv, 284, 1919. 



An exclusively Indo-Australian genus of moderate extent, the species mostly 

 pretty uniform in structure and fades, but including a few aberrant forms which 

 render its demarcation rather difficult. Turner's diagnosis (loc. cit.) is good, 

 but he had very little material and no and was unaware of some points in 

 which there is variability : (1) the long stalk of SC 1-2 by no means always 

 anastomoses with C ; (2) the $ hind tibia is dilated in about three-fifths of the 

 species (" not dilated " was quoted from Hampson). The rather acute apex 

 of the fore wing, and the more or less wavy distal margins are generally cha- 

 racteristic. M 1 of the fore wing generally arises close to the hind angle of the 

 cell, but is occasionally (as in N. argyroslicha Turner) considerably more 

 proximal. In the same species, R 2 of the fore wing arises well before the middle 

 of DC, while N. synodoneura Prout is still more advanced in this respect, having 

 the origins of R 1 and R 2 very close together ; in the latter species it may possibly 

 be a character only, the 2 being still unknown. 



The previously known range of the genus extended from India to the Bis- 

 marck Archipelago and the Solomon Is. The variable and interesting Samoan 

 species is, I suppose, nearest to N. extractata Prout (Louisiade Archipelago). 

 Since the descriptions of the species are very scattered and the genus has never 

 been handled as a whole, I offer a provisional key, together with a few supple 

 mentary notes. 



1. Palpus and face-cone moderate (huj. gen. ?) ... 2 

 Palpus and face-cone long ...... 3 



2. Dark, with termen of fore wing subconcave anteriorly . umbrifera Wileman (1910). 

 Not dark, terrnen not subconcave ..... cuneigera Warren (1906). 



3. Postmedian line of fore wing at hind margin close to costal 



end of that of hind wing ..... 4 

 Postmedian line of fore wing ending well before costal end 



of that of hind wing ...... 16 



4. Fore wing with R 2 arising near R 1 ($ unknown) . . synodoneura Prout (1923). 

 Fore wing with R 2 normal ...... 5 



