308 NOTODONT1NA ISTAUBOPUS 



deep; 5-10 with pairs of prominences, posteriorly smaller; 12 

 and 13 much swollen : on beech, oak, etc. ; 8, 9. It has been 

 suggested that this curious larva resembles a dead and crumpled 

 beech-leaf. 



6. PTILOPHORA, Stph. 



Eyes glabrous. Antennae in very strongly bipectinated to 

 apex. Palpi rather short, rough-haired. Thorax with slight 

 anterior crest. Anterior tarsi rough -scaled ; posterior tibiae 

 without middle-spurs. Fore wings : 5 weak, 10 out of 9 near 

 base. Hindwings : 8 approximated to end of cell. 



Only one species is satisfactorily established. Larva with- 

 out prominences, beneath neck with a protrusible furcate 

 appendage. 



1. P. plumigera, Esp. 32-40 mm. Forewings thinly scaled, 

 reddish-ochreous-brown, veins fuscous ; a longitudinal greyish 

 posterior suffusion above and below middle ; first line some- 

 times faintly yellowish ; second obscurely yellowish, waved, 

 distinct on costa; sometimes an obscure yellowish terminal 

 band, interrupted by the grey suffusions ; cilia dark-spotted. 

 Hindwings thinly scaled, pale reddish-grey ; a faint pale post- 

 median fascia. 



Hants to Bucks, Gloucester, Devon, local ; C. Europe ; 10, 

 11. Larva whitish - green ; dorsal stripe broad, light blue- 

 green ; subdorsal line white ; spiracular double, whitish : on 

 maple and sycamore ; 5, 6. 



7. PTEROSTOMA, Germ. 



Eyes glabrous. Antennae in $ bipectinated to apex. Palpi 

 very long, erect, clothed with long dense rough scales. Thorax 

 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 beyond middle. 



Besides the one European, there are two or three Central 

 Asiatic species. Larva without prominences. 



1. P. palpina, L. 38-46 mm. Forewings light brown, 

 partially mixed with whitish-ochreous, veins finely blackish ; an 

 oblique blackish mark from base of costa ; first and second 

 lines obscurely darker, double, dentate, forming blackish dots 

 on veins ; median line suffusedly darker, very obscure ; termen 

 waved. Hindwings dark grey, towards base pale fuscous. 



Britain to Ross, E. Ireland, common ; Europe, Asia Minor ; 



