SIMAETHIS] PLUTELLIDAE 707 



tinged ; an indistinct dark fuscous dentate line at J, and another 

 obtusely angulated at f , both sometimes almost wholly obsolete, 

 or towards costa blackish and edged with whitish costal dots ; 

 cilia more purple-tinged. Hindwings dark fuscous. 



Britain to the Clyde, local; C. Europe, WC. Asia to 

 Turkestan; 7, 9-3. Larva pale grey ish- green ; dorsal line 

 broad, yellowish ; spots large, black : in a slight web on apple 

 and hawthorn ; 5, 6, 8. The imago is sometimes found abun- 

 dantly in old thatch in autumn. 



2. S. fabriciana, L. 11-13 mm. Forewings dark fuscous, 

 sprinkled with whitish; an indistinct irregular whitish transverse 

 line at J and another at -f, preceded by a darker suffusion, both 

 (especially the anterior) sometimes only appearing as whitish 

 costal dots ; cilia broadly whitish above and below middle of 

 termen. Hindwings dark fuscous ; a whitish subterminal line 

 on dorsal half. 



Britain to the Shetlands, Ireland, plentiful ; Europe ; 5, 6, 

 8, 9. Larva ochreous - whitish ; spots pale fuscous; head and 

 plate of 2 pale fuscous : in a slight web on Urtica and 

 Parietaria ; 4, 5, 7, 8. 



6. TINEIDAE. 



Head usually rough-haired, at least on crown, seldom smooth. 

 Tongue usually developed. Antennae -3, sometimes with eye- 

 cap. Labial palpi usually porrected or drooping, more or less 

 pointed but hardly acute. Maxillary palpi commonly developed, 

 often several-jointed, folded. Forewings : Ib furcate or simple, 

 7 and 8 usually separate, one or more veins often absent. 

 Hindwings 1 or under 1, ovate to linear; 3 and 4 usually 

 remote, cell often open, one or more veins often absent. 



This family is of large size, and includes forms varying 

 considerably in structure, yet so closely united by transitional 

 gradations that they cannot be satisfactorily separated. 

 Although simple porrected maxillary palpi are found in other 

 families, folded maxillary palpi with five or six joints only occur 

 in this family and the Micropterygidae ; they are however by 

 no means present in all the genera, and of tw*o closely allied 

 genera are often present in one and obsolete in the other. 

 Their occurrence is in fact so irregular that they seem to offer 

 an exception to the rule that rudimentary organs are not 

 redeveloped ; this is probably accounted for by their being 

 persistent in the pupa. Some of the species are extremely 



