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 Gracilaria, of wliich it is pi-obably an early 

 specialised ott'shoot. 



1. Posterior tibiae bristly above . 3. hrongniardeUutn. 



,, „ smooth above . . .2. 



2. Forewings pale yellowish . . 1. sul^y/nirellwn. 



,, not yellowish . . 2. cumdipenndluni. 



1. C. sulphurellum, I/ir. {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. 



Bi'itain to Caledonian Canal, N. Ireland, amongst oaks, local ; 

 C. and S. Europe ; 9-4. 



2. C. cuculipennellum, llh. 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 f 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 l)rown : within 

 conically rolled leaves of Li</ustrutn ; 7, 8. 



3. 0. 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, IIu'. 



Head smooth. Antennae 1 or over 1, in c^ 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 



