CORISCIUM] TINEIDAE 749 



with rough tuft of scales towards apex beneath ; posterior 

 tibiae sometimes bristly above. 



A very small but nearly cosmopolitan genus ; it agrees in 

 all its habits with Gracilar-ia, of which it is probably an early 

 specialised oflshoot. 



1. Posterior tibiae bristly above . 3. brongniardellum. 



,, smooth above . . .2. 



2. Forewings pale yellowish . . 1. sulphur ellum. 



,, not yellowish . . 2. cuculipennellum. 



1. C. sulphurellum, Hw. (citrinellum, Z.) 12-14 mm. 

 Posterior tibiae smooth above. Forewings pale whitish- 

 yellow, with some scattered minute black dots, variable in 

 development ; sometimes spots of grey strigulae, especially in 

 disc; sometimes a ferruginous black -spotted median longi- 

 tudinal streak from base of costa to apex. Hindwings dark 

 grey. 



Britain to Caledonian Canal, N. Ireland, amongst oaks, local ; 

 C. and S. Europe ; 9-4. 



2. C. cuculipennelium, ///>. 11-12 mm. Posterior tibiae 

 smooth above. Forewings whitish, with numerous ochreous 

 or brown strigulae finely irrorated with black ; an oblique 

 fascia near base hardly reaching costa, a second before middle 

 hardly reaching dorsum, a third beyond middle interrupted 

 in disc, and a costal spot at J ochreous or brownish, finely 

 irrorated with black. Hindwings dark grey. 



England to Cumberland, N. Ireland, local ; C. Europe ; 9-4. 

 Larva green-whitish ; head and plate of 2 brown : within 

 conically rolled leaves of Lif/ustrum ; 7, 8. 



3. C. brongniardellum, F. 8-10 mm. Posterior tibiae bristly 

 above. Forewings fuscous, sprinkled with yellow -whitish; 

 four slender oblique white fasciae, edged with black, more 

 strongly anteriorly, last three interrupted near dorsum ; a 

 black projecting hook in apical cilia. Hindwings dark grey. 



England to Cumberland, E. Ireland, not uncommon ; C. and 

 S. Europe, N. Africa ; 7-9. Larva pale whitish-green ; dorsal 

 line darker ; head pale brown : in blotches in leaves of oak : 

 6,7. 



10. GRACILARIA, Hw. 



Head smooth. Antennae 1 or over 1, in $ simple, basal 

 joint without pecten. Labial palpi long, curved, ascending, 

 second joint smooth or loosely scaled beneath towards apex, 

 terminal almost as long, pointed. Maxillary palpi moderately 



