OX LARVJE. 81 



exceptions to the ordinary arrangement of pro-legs 

 and true-legs; for instance, though in almost all 

 cases the pectoral or true feet of Lepidopterous 

 insects are much shorter in the larva than in the 

 perfect insect, yet in that anomalous Caterpillar 

 popularly known as the Lobster (see Plate V. No. 3), 

 the pectoral legs are as long, or longer, than in the 

 perfect insect ; this form being required, it is said, 

 in order to enable it to spin its complicated cocoon. 

 In the larva of Beetles the pro-legs seldom occur, 

 or are, at all events, not well developed. 



Some kinds of larvae are furnished with other 

 appendages, in addition to their feet, to aid them in 

 locomotion, such as the hooks on the back of the 

 larva of a little Beetle, Cicindela Hybrida, which 

 assist it in ascending the hole in which it lives ; the 

 fringes which assist water larvae in guiding their 

 course ; and a similar appendage by means of which 

 the larvae of the great "Water Beetle are enabled to 

 suspend themselves at the top of the water to take 

 in air. 



The Spiracles or Breathing Places never 

 occur in the head, nor in connection with the 

 mouth, as in the higher animals, but are arranged 

 along the sides in the perfect larvae, and sometimes 

 along the back or underneath in the larvae of insects 



G 



