2 LLOYD'S NATURAL HISTORY. 



developed. Fore-wings triangular; hind-wings broader than 

 the fore-wings, more slender, and folded beneath them like a 

 fan when at rest ; nearly always differently, and usually 

 obscurely, coloured ; frenulum present. Flight nocturnal or 

 crepuscular ; in some families diurnal. 



FAMILY XL. THYATIRID^. 



Larva. — With sixteen legs, smooth or slightly humped, feed- 

 ing exposed on trees and shrubs, or between leaves slightly 

 connected with silk. 



Pupa. — Usually enclosed in a slight cocoon among moss or 

 rubbish at the foot of the tree on which the larva has fed ; 

 more rarely in the mass of leaves towards the extremity of a 

 branch frequented by the larva. 



Imago. — Moderately stout, downy ; antennae simple, slightly 

 thickened in the males ; wings moderately long and broad, 

 entire, and with the discoidal nervule rising almost from the 

 middle of the discoidal cell ; or in the hind-wings, sometimes a 

 little lower ; hind-wings, with the costal and sub-costal nervures 

 approximating, and almost or quite united above the end of 

 the cell. 



This Family is now classed by many authors with the 

 Bombyces. 



GENUS THYATIRA. 



Thyatira, Ochsenheimer & Treitschke, Schmett. Eur. iv. p. 77 

 (1816); vi. (2), p. 161 (1825); Guende, Spec. Gdn. 

 L^pid. Noct. i. p. 10 (1852). 



Eyes naked ; palpi long, hairy ; last joint naked, very long ; 

 antennae ciliated in the male; thorax with a double crest, 

 approximating in the middle ; abdomen slightly crested at the 

 base; wings rounded, marked with large spots; fore-wings 



