eubi.kmma] PLUSIADAE 169 



I. of Wi*:lit to Devon and Somerset, I. of Man, scarce and 

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



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

 wings ochreons-white, suffused with light grey exce])t towards 

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

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

 jection, posteriorly edged with ocln-eous-grey suffusion ; subtei'- 

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

 Hiudwings fuscous-whitish, becoming fuscous posteriorly. 



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

 spun shoots of Gnaphaliwm ; 6. 



22. RivuLA, On. 



Head with tolerably appressed 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-scaled. Forewings : 7 and 8 out of 

 9, 10 separate. Hiudwings : 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 ver}- 

 eai'ly form of the family, none such occurring in Britain. 

 Larva with all prolegs developed. Pupa placed against the 

 top of an incurved gi'ass-blade, behind a few threads of silk. 



1. R. sericealis, Sc. 21-23 mm. Head whitish. Forewings 

 ochreous-yellowish, towards costa posteriorly and along terraen 

 spi'inkled or suffused with brownish ; first and second lines 

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

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

 becoming fuscous posteriorly. 



Britain to I. of Arran, Ireland, common ; Europe, Sja-ia, N. 

 Asia; 6, 7. Larva gz'een ; dorsal line darker ; subdorsal white, 

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

 podium sylvaticurn ; 8-5. 



4. OCNERIADAE. 



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

 short, usually rudimentary. Antennae in S bipectinated to 

 apex. Labial palpi modo-ate, porrected, with dense rough hairs 

 or scales. Thorax hairy above and beneath. Femora and 

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



