314 NOTODONTINA [satubnia 



cous, second waved ; a white discal blotch including a large 

 round black spot, in which is an ochreous ring edged anteriorly 

 with deep crimson and blue-whitish ; black ante-apical and 

 deep crimson subapical spots ; white subterminal and brownish 

 terminal streaks. Hindwings as forewings, but without apical 

 spots, in (^ suffused with orange. 



Britain to the Orkneys, N. and W. Ireland, somewhat local ; 

 Europe, N. and WC. Asia ; 5. Larva bright green ; on each 

 segment a transvei'se series of yellow or rosy tubercles, bearing 

 tufts of blackish hairs, often placed in biack transverse bands : 

 on Calluna, Salix, blackthorn, etc. ; 6-9. 



3. LASIOCAMPINA. 



Maxillary palpi obsolete. Forewings : Ic absent, 5 approxi- 

 mated to 4 towards base, 9 and 10 stalked. Hindwings without 

 frenulum (except Drepanidae), Ic absent, 8 approximated to 7 

 beyond cell, or seldom connected or anastomosing with cell only. 



This group, which may probably once have been much more 

 extensive, has now ceased to occupy a foremost position. The 

 three families which represent it in Britain muster but few 

 species, though some are conspicuous from their large size. 



Imago with forewings more or less broad-triangular ; hind- 

 wings broad-ovate. 



Type of marJcmgs as in Notodontina. 



Larva usually with 10 prolegs, those on 13 sometimes absent. 



Pupa with segments 9-11 free; not protruded from cocoon 

 in emergence. 



The three families spring independently from a common 

 ancestral form, which must itself have been developed from the 

 Heterogeneidae. 



Tabulation of Families. 



1. Frenulum present ... 1. Drepanidae. 



,, absent . . , . . 2. 



2. Forewings with 7 out of 10 . 2. Endromididae. 



„ 7 separate from 10 . 3. Lasiocampidae. 



1. DREPANIDAE. 



Ocelli present. Eyes glabrous. Antennae i, in i$ bijjectin- 

 ated. Labial palpi rather short, subascending, loosely or shortly 

 rough-scaled, terminal joint short, rather pointed. Thorax 

 rather hairy beneath. Forewings : lb furcate, lower branch 



