ATTEMPTED DIVISION OF BRITISH INSECTS. 383 



Pupa, more or less hairy ; changes in a cocoon composed of silk, 

 in which the hairs of the larva are always intermixed. Imago, 

 the males with somewhat slender bodies ; more or less pectinated 

 antennae, and active ; often flying by day ; the females very heavy, 

 sluggish, and often apterous. Acronyeta (part), Spilosoma, Arctia, 

 Hypercampa, Lithosia (part), Hypogymna, Laria, Orgyia. f 



Natural Order. — Bombycites, Eggars. 



Larva elongate, cylindrical, of equal substance, hairy, with ten 

 prehensile feet ; rolls in a ring when touched. Pupa in a silken 

 cocoon, more close than the preceding. Imago with pectinated 

 antennae in both sexes ; males with slender bodies, very active, 

 and fly by day : females heavy, sluggish, and seldom fly ; predo- 

 minating colour, fulvous. Eriogaster, Odonestis, Gastropacha, 

 Lasiocampa. 



Natural Order. — Phal^nites, Emperor-moths. 



Larva obese, with fascicles of bristles disposed in rings on each 

 segment. Pupa short, obtuse, flat, with bristles at the tail ; 

 changes in a tough pear-shaped cocoon, of which the smaller end 

 remains open. Imago with highly pectinated antennae in both 

 sexes ; wings amazingly expanded ; the fore wings more or less 

 falcate ; beautifully coloured, and ocellated ; body short and 

 small ; flight of the males diurnal, of the females rare, and mostly 

 in the evening. Saturnia. 



Natural Order. — Notodontites, Prominents. 



Larva generally naked ; sometimes slightly downy ; attenuated 

 towards the tail, with eight prehensile feet ; the two posterior 

 ones being mostly wanting, and the segment usually bearing 

 them elevated in the air. Pupa smooth, obese, compact ; mostly 

 changes in a cocoon or web, but occasionally on or in the ground. 

 Imago with the antennae of the males more or less pectinated; 

 wings deflexed ; flight, with few exceptions, in the evening. 

 Endromis, Cerura, Stauropus, Platypteryx, Cilix, Notodonta, 

 Pygcera, Clostera. 



Natural Order. — Cossites, Wood-eaters. 



Larva depressed, rather attenuated towards either extremity ; naked, 

 except a few scattered hairs ; pro thorax flat and corneous ; ten 



f Those in which the larva is furnished with brushes of hair, and in which the 

 female imago is apterous, I have elsewhere treated as a separate order ; the dis- 

 tinctions, however, seem of very doubtful value. 



