212 CLASSIFICATION OF INSECTS. 



when touched. Pupa smooth ; mostly changes in the 

 ground. Imago with filiform antenna ; occasionally pec- 

 tinated in the males ; wings small, deflexed ; body stout 

 and heavy ; colom* dusky ; flight very rapid ; nocturnal. 

 Noctiia, subdivided into numerous genera. 



Millers or Arctiites. Larva very hairy ; sometimes with 

 bunches, brushes, or fascicles of hairs ; with ten prehensile 

 legs ; rolls in a ring when touched. Pupa more or less 

 hairy; changes in a cocoon composed of silk, in which 

 the hairs of the larva are always intermixed, hnago, the 

 males with somewhat slender bodies and more or less pecti- 

 nated antennce ; active, often flying by day ; the females 

 very heavy, sluggish, and often apterous. Acronycta, 

 Spilosoma, Arctia, the caterpillar of which is represented 

 at page 8, Hypercampa, Lithosia, Hypogynma, Laria, 

 Orgyia. 



Eggars or Bomhycites. Larva elongate, cylindrical, of 

 equal substance, hairy ; with ten prehensile feet ; rolls in 

 a ring when touched. Pupa in a silken cocoon, more com- 

 pact than the preceding. Imago with pectinated antenncs 

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

 fly by day ; females heavy, sluggish, and seldom fly ; pre- 

 dominating colour, fulvous. Eriogaster, Odonestis, Gas- 

 tropacha, Lasiocampa. 



Emperor-moths or Phaleenites. Larva obese, with fas- 

 cicles 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 par- 

 tially open. Imago with highly pectinated anteniKB 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, the 

 caterpillar of which is represented at page 130. 



