CLASS INSECTS. 



407 



themselves into leaves, or suspend themselves to some foreign 

 body by means of a silken thread. 



Amongst the lepidoptera, some fly during the day, others 

 show themselves only at dusk, and others remain as it were 

 benumbed during the day, and appear only at night. The 

 diurnal are known by their wings elevated vertically during 

 repose (Fig. 392), and are remarkable for the variety and 

 brilliancy of their colours. They are generally termed papil- 

 lons (butterflies), but zoologists divide them into vanessse 



Fig. 394. Oak-Leaf Moth. 



Fig. 395. Pyrales of the Tme.* 



(Fig. 391), papillons, properly so called (Fig. 364), danaides 

 (Fig. 392), &c. The twilight and the nocturnal have the wings 

 horizontal during repose, and have in general more sombre 

 colours than the preceding. These are the sphinx (Fig. 393), 

 the bombyces (Figs. 372 and 394), the phalense, the tineite, 

 &c. The pyralis (Fig. 395), which occasions also such 

 destruction to the vineries, belongs to this group. 



544. The hemiptera also have the mouth formed for 



* Leaf of the vine attacked by the pyrales : 4, the male ; 4a, th female; 

 4i, the caterpillar ; 4c, the eggs ; 4<f and 4, the chrysalides. 



