PTEUOSTOMA] NOTODONTIDAE 309 



6, 7. Larva pale bluish-green ; subdorsal and lateral lines 

 white, tubercular ; spiracular yellow, black-edged above, on 2-4 

 pinkish-marked : on poplar and Salix ; 7-9. 



8. ODONTOSIA, Hb. 



Eyes hairy. Antennae in $ dentate, fasciculate -ciliated. 

 Palpi rather short, rough -haired. Thorax sometimes with 

 strong triangular central crest. Abdomen with small dorsal 

 crest. Forewings with dorsal scale-tooth ; 10 rising separate, 

 connected or anastomosing with 9. Hindwings : 8 approximated 

 to cell to beyond middle. 



A small genus, principally Asiatic, but occurring throughout 

 the Northern hemisphere. Larva sometimes with prominence 

 on 12, and then holding anal extremity aloft in repose. 



1 . Thoracic crest very large . . . .2. 



obsolete . . .3. carmelita. 



2. Forewings with whitish terminal blotch . 2. cuculla. 



without whitish blotch . 1. camelina. 



1. 0. camelina, L. 36-40 mm. Forewings rather dark 

 reddish -ochreous- brown ; a dark brown dorsal suffusion, in- 

 cluding a brownish-ochreous patch along basal half of dorsum; 

 subbasal, first, and second lines indistinct, dark fuscous, dentate ; 

 beyond second a series of whitish -ochreous dots and black 

 dashes on veins ; termen waved. Hindwings fuscous ; a pale 

 posterior line, intersecting a dark fuscous tornal spot. 



Britain to Sutherland, Ireland, common ; N. and C. Europe, 

 N. Asia ; 5, 6. Larva resting with head thrown back ; green, 

 sometimes pinkish-ochreous or purplish; dorsal line darker; 

 spiracular yellow, red-spotted ; 1 2 with two red tubercular pro- 

 jections : on oak, beech, hazel, etc. ; 7-10. 



2. 0. cuculla. Esp. (cucullina, Hb.) 34-36 mm. Forewings 

 red -brown, darker dorsally, costa broadly suffused anteriorly 

 with pale ochreous ; first and second lines dark fuscous, dentate, 

 traceable towards extremities only ; a white blotch including a 

 grey suffusion along lower of termen, interrupted by a median 

 bar marked with a black vein ; veins towards apex dark fuscous. 

 Hindwings fuscous ; a faint pale posterior line, intersecting a 

 dark fuscous tornal spot. 



S. England to Leicester and Norfolk, local; C. Europe; 5, 

 6. Larva whitish-green or pale flesh -colour; on 2-5 a dark 

 green or purplish dorsal blotch, thereafter reduced to slender 

 dorsal and subdorsal lines ; subspiracular sometimes yellowish ; 

 1 2 with bicuspidate prominence : on maple ; 7-9. 



