PKAY>] 



PLUTELLIDAE 



695 



| ; some irregular blackish marks towards termen ; sometimes 

 the whole wing is unicolorous dark fuscous. Hind wings rather 

 dark grey. 



Britain to Caledonian Canal, Ireland, common ; C. Europe, 

 Asia Minor; 6, 7. Larva greenish, marbled with red -brown 

 above ; dorsal line deep green ; head pale brown, dark-spotted ; 

 2 with two black spots : when young mining in leaves, after- 

 wards in bark of shoots, ultimately in spun shoots of ash ; 

 10-5. 



3. YPONOMEUTA, Latr. 



filiform, minutely ciliated, 



Hi-ad smooth. Antennao ;], iu 

 basal joint without pecten. Labial 

 palpi moderate, curved, ascending, 

 second joint with apprcssed scale-, 

 terminal as long as or longer than 

 second, somewhat roughened in 

 front, acute. Maxillary palpi rudi- 

 mentary. Forewings : 7 and 8 

 separate. Hindwings 1, elongate- 

 ovate, with transparent subbasal 

 patch, cilia ; 4 absent, 6 and 7 



nearly parallel. Neuratiou of Yponomeuta plumbellus. 



A rather small but nearly cosmopolitan genus, absent from 

 New Zealand. Imago with forewings elongate, rather narrow, 

 termen oblique. Larva gregarious, in a dense common web. 



1. Head grey . . .6. vigintipunctatus. 



white . 2. 



2. Forewings with blackish spot on fold . . 3. 



without such spot . . .4. 



3. Forewings with blackish suffusion in apical cilia 



5. plumbellus. 

 ,, without blackish apical suffusion 



4. irrorellus. 

 4. Lowest series including 9-11 dots . 1. evonymdlu*. 



4-7 dots . . .5. 



5. Cilia of forewings white . . .2. cognatt-11 n<. 



,, more or less grey . 3. padel/u*. 



1. Y. evonymellus, L. (padi, Z.) 20-23 mm. Head white. 

 Forewings whitish ; five or six longitudinal series of numerous 

 black dots, first not reaching middle, lowest including 9-11 

 dots; some additional black dots before termen; cilia white 1 . 

 Hindwings dark grey. 



