116 Mr. H. T. Stainton on Gracilaria, 



Section A. 



a. With a distinct, paler, trigonal mark on the costa. 



* The trigonal mark reaches with its apex beyond the fold 

 of the wing. 



Sp. 1. Franckella. The base of the trigonal mark is 

 prolonged along the costa towards the apex of the 

 wing. 

 § Sp. 2. Oneratella. The base of the trigonal mark is 

 not prolonged along the costa. 



* * The trigonal mark does not reach beyond the fold of 

 the wing, but its apex is prolonged posteriorly. 



Sp. 3. Stigmatella. 



b. With a more or less distinctly margined, but hardly paler 

 trigonal mark on the costa ; the trigonal mark does not reach 

 beyond the fold of the wing. 



Sp. 4. Stramineella. Anterior wings straw colour. 



Sp. 5. Hemidactylella. Anterior wings reddish ochre- 

 ous ; costal triangle paler. 



Sp. 6. Falconipennella. Anterior wings reddish-grey- 

 brown. 



Sp. 7. Semifascia. Basal half of the costal triangle 

 very conspicuously paler than the posterior half. 



Sp. 8. Populelorum. Costal triangle very indistinct ; 

 a conspicuous black spot on the costa beyond the 

 middle. 



Sp. 9. Inconstans. Anterior wings rufous-ochreous, 

 or rufous ; costal triangle not paler than rest of the 

 wing. (Most of the varieties of this species.) 

 c> With no trigonal mark on the costa ; anterior wings uni- 

 colorous, or spotted longitudinally. 



* Anterior wings rufous. 



Sp. 9. Inconstans. Hinder femora pale yellowish. 



(A few varieties of this species.) 

 Sp. 10. Elongella. Hinder femora entirely brownish. 

 § Sp. 11. Ritfipennella. Hinder femora with the base 

 whitish ; apex brownish-black. 



* * Anterior wings bone colour, or pale yellowish. 



Sp. 12. Tringipennella. Costal portion of the wing 

 whiter. 

 § Sp. 13. Limosella. Costal portion of the wing not 

 whiter. 



