GROUPS AND FAMILIES 79 



We have only 4 British species, including the Long- 

 legged Pearl and Diasemia literalis. 



9. HYDROCAMPIM;. Imago with the antennae of the 

 male simple ; palpi rather short, ascending ; the abdo- 

 men rather long and slender ; the wings entire, smooth, 

 silky, but not transparent. Larva smooth, shining; 

 feeding under water. 



This family includes the China Marks and the 

 singular Acentropus niveus. We have only 5 British 

 species. 



10. BOTTOM. Imago with the antennae of the male 

 simple ; palpi porrected ; the abdomen rather slender, 

 conical; the wings broad, slender, shining, often 

 iridescent; the anterior wings triangular, with glossy 

 fringes. Larva shining, rather fusiform ; feeding be- 

 tween united leaves. 



This family includes the Small Magpie Moth, the 

 Mother of Pearl, the Garden Pebble, the Diamond 

 Spot, the White Brindled, and the Dusky Brindled. 

 We have 28 British species. 



11. NOLID^:. Imago with the antennae of the male 

 ciliated ; palpi rather long, somewhat drooping ; the 

 anterior wings with the costal margin rather rounded, 

 with three tufts of raised scales ; the posterior wings 

 rounded with no markings ; in repose the anterior wings 

 completely cover the posterior wings, forming a triangle. 

 Larva with 14 legs, short, thick, rather hairy. 



' We have only 5 British species of the genus Nola. 



12. CHOEEUTID^E. Imago with the antennas simple ; 

 palpi rather short ; the anterior wings rather oblong ; 

 in repose partially covering the posterior wings and 

 slightly erected ; flight diurnal. Larva with 16 legs, 

 feeding on leaves in a white web. 



