bubi.emma] PLUSIADAE 169 



I. of Wight to Devon and Somerset, I. of Man, scarce and 

 local ; S. Europe, WO. Asia to N. Persia ; 6, 7. 



3. E. paula, lib. 14-18 mm. Head and thorax white. Fore- 

 wings ochreous-white, suffused with light grey except towards 

 base and along costa ; median shade straight, ochreous-grey ; 

 second line straight, whitish, with a small angular median pro- 

 jection, posteriorly edged with ochreous-grey suffusion ; subter- 

 minal obscurely whitish, followed by a darker grey costal spot. 

 Hindwings fuscous-whitish, becoming fuscous posteriorly. 



I. of Wight, rare and local ; C. Europe ; 7, 8. Larva amongst 

 spun shoots of Gnaphalitim ; 6. 



22. Rivula, Gn. 



Head with tolerably apprcssed scales, with slight frontal tuft. 

 Antennae in $ ciliated. Palpi moderately long, porrected, 

 second joint with dense projecting scales beneath rather tufted 

 anteriorly, terminal short. Thorax smooth -scaled. Abdomen 

 not crested. Tibiae smooth-sealed. Forewings : 7 and 8 out of 

 9, 10 separate. Hind wings : 5 somewhat approximated to 4. 



Besides the following, two N. American species have been 

 referred to this genus, which must not be regarded as a very 

 early form of the family, none such occurring in Britain. 

 Larva with all prolegs developed. Pupa placed against the 

 top of an incurved grass-blade, behind a few threads of silk. 



1. R. sericealis, Sc. 21-2.3 mm. Head whitish. Forewings 

 ochreous-yellowish, towards costa posteriorly and along termen 

 sprinkled or suffused with brownish ; first and second lines 

 fuscous-tinged, very faint ; reniform fuscous, containing two 

 black dots. Hindwings fuscous-whitish, yellowish -tinged, 

 becoming fuscous posteriorly. 



Britain to I. of Arran, Ireland, common ; Europe, Syria, N. 

 Asia; 6,7. Larva green ; dorsal line darker ; subdorsal white, 

 inner edge waved; head pale greenish -ochreous : on Drachy- 

 podiwm sylvaticum ; 8-5. 



4. OCNERIADAE. 



Head rough-haired. Ocelli present. Eyes glabrous. Tongue 

 short, usually rudimentary. Antennae in S bipoctinated to 

 apex. Labial palpi moderate, porrected, with dense rough hairs 

 or scales. Thorax hairy above and beneath. Femora and 

 tibiae densely hairy. Forewings: 7 and 8 out of 9. Hindwings: 



