THECLA] LYCAENIDAE 343 



A very considerable genus, chiefly South American, but also 

 inhabiting N. America, Europe, N. and C. Asia, and N. Africa. 

 Larva short, stout, narrowed towards extremities. 



1. T. rubi, L. 25-31 mm. Forewings and hind wings rather 

 dark fuscous, ochreous-tinged ; hind wings with termen waved. 

 Wings beneath rather metallic green, forewings becoming 

 fuscous dorsally, sometimes with white postmedian line ; hind- 

 wings sometimes with postmedian white line or series of dots. 



Britain to Ross, Ireland, common ; Europe, N. and WC. 

 Asia, Japan, N. Africa ; 5, 6. Larva green ; dorsal line lighter, 

 darker-edged ; subdorsal series of oblique subconfluent streaks, 

 edged beneath with dark green ; spiracular line yellow ; head 

 pale brown : on Genista, Cytisiis, Ulex, and Vaccinium ; 6, 7. 

 Pupa subterranean. 



2. T. pruni, L. 31-36 mm. Forewings dark brown, in <j? with 

 indistinct orange subterminal spots towards tornus. Hind- 

 wings dark fuscous, with indistinct orange subterminal spots, 

 more distinct towards tornus, especially in <j> ; termen with a 

 linear projection on 2. Wings beneath ochreous -brown ; a 

 postmedian series of white transverse linear marks ; a sub- 

 terminal orange band, preceded by a series of small black 

 anteriorly white -edged spots, both partially obsolete in 

 forewings. 



England to Derby, local ; C. Europe, NW. Asia ; 6, 7. 

 Larva green ; dorsal and spiracular lines yellowish ; head 

 yellowish : on blackthorn ; 4, 5. This larva, though not 

 difficult to obtain, does not seem to have been satisfactorily 

 described. Pupa attached by tail and central belt. 



3. T. w-album, Kn. 27-35 mm. Forewings and hindwings 

 dark fuscous ; hindwings with long linear terminal projection 

 on 2, and short tooth on 3. Wings beneath brown ; a post- 

 median somewhat interrupted white line, in hindwings forming 

 two sharp angles towards tornus ; in hindwings an orange 

 subterminal band, edged anteriorly with blackish preceded by 

 whitish scales, posteriorly by two black spots towards tornus. 



England to York, local ; C. and SE. Europe, Asia Minor, N. 

 Asia ; 7. Larva green, segmental ridges yellowish ; dorsal line 

 double, darker green ; lateral series of oblique darker green 

 streaks ; head blackish : on elm ; 9-6. Pupa attached by tail 

 and central belt. 



4. T. betulae, L. 35-41 mm. Forewings dark brown ; a 

 blackish discal mark ; an orange postmedian band, not reaching 

 margins, in $ reduced to one or two paler spots. Hindwings 



