New Species of Lcpidoptera Hctcroccra. 487 



in both wings broadly black brown; cellspots black, that of fore- 

 wing large ; costa of fovewing yellow with black strigae. 



Head, thorax, and abdomen ochreous thickly speckled with black ; 

 the segmental divisions of dorsum black. 



Expanse of wings : 22 mm. 



1 2 from M'fongosi, Zululand, October, 1911. (W. E. Jones.) 



SUB-FAMILY BISTONINAE. 



GEN. ILLA, gen. nov. 



Forcwiny : Narrow ; costa somewhat shouldered at base and 

 indented at middle ; the apex bluntly prominent ; termen curved, 

 subcrenulate ; inner margin straight. 



Hind winy : With termen rounded, crenulate ; the inner margin 

 with slight fold beneath, causing a curved ridge above and fringed 

 with long hairs ; cell in both wings more than half the length 

 of wing. 



Forewing with the two halves of cell beneath filled with long silky 

 hairs ; pectus and femora woolly ; hind tibiae greatly swollen ; all the 

 tarsi short ; palpi shortly rostrate, rough-haired ; tongue absent ; 

 antennae lamellate with short close curved teeth. Type Illanefanda, 

 spec. nov. 



Allied to llaygardia and On/pJ/aliicha. 



33. ILLA NKFANDA, spec. nov. 

 (Plate XLI., fig. 5.) 



Forewiny : Grey with darker speckling, suffused nearly throughout 

 with purplish fuscous ; the grey basal area limited by a curved black 

 line ; outer line black, sinuate, subdenticulate above middle, concave 

 outwards between -veins 3 and 1, then shortly oblique inwards ; a 

 large dark cellspot ; subterminal line crenulate, pale grey, preceded 

 by a darker tint, running parallel to outer line and termen ; fringe 

 concolorous. 



Hlndwiny : Pale grey, with base more ochreous and termen 

 darker grey ; a blackish dash at rise of veins 3, 4, and on vein 

 2 below it. 



Underside of fore wing pale slate grey ; the costa red mottled with 

 yellowish spots and strigae ; fringe slate grey, with the tips deep 

 chocolate brown ; hindwing grey dark-speckled, flushed with pale 



