130 



Invertebrata. 



liar looped attitude which the larva assumes in pro- 

 gression. The silkworm moth, a native of North 

 China, secretes by its labial glands the silk of com- 

 merce. The sphinx moths, called so from their 



FIG. 73. FIG. 74. 



Chrysalis. 



Deilelphila Elpenor, Hawk Moth. 



attitude in which the caterpillars are often found, with 

 their heads and fore parts raised, are known by their 

 prismatic antennae and by the long horn on the tail 

 end of the caterpillar. One of these, the death's 

 head moth (whose large green larva feeds on potato 

 leaves) bears on the back of its thorax a rude coloured 

 figure like a skull, hence the ominous name given to it. 



While nearly all moths are nocturnal, the true 

 butterflies, recognised by their brighter colours and 

 their club-shaped antennae, are diurnal in their habits. 



The best known examples are the white cabbage 

 butterfly, the nettle tortoiseshell, and the thistle painted 



