154 INSECTS. 



which shelter their young. The Social Bees, Wasps, 

 and Ants, day by day, or rather hour by hour, supply 

 their young with food ; while, in the case of the Gall- 

 flies, it is produced by a mode of oviposition which 

 secures for the young both a home and a supply of food, 

 by an arrangement as cosy as that of a little mouse in 

 a big cheese. 



The Iarva3 of one family, the Sawflies, differ greatly 

 from all others in the order. They have both the true 

 and the false legs which are found in the caterpillars of 

 Moths and Butterflies, and, provided with the means of 

 locomotion, seek from leaf to leaf and from branch to 

 branch that nourishment which is rendered scarce only 

 by their own devastations. 



The pupa in this order is inactive, and resembles that 

 of the Beetles, the limbs being all sheathed separately 

 (see figs. 27, 28, p. 57), and not as in the chrysalis of the 

 Moth or Butterfly, inclosed in one general or undivided 

 envelope. 



The Order is divided into two Sections, TEREBRANTIA, 

 and ACULEATA. 



Section 1. TEREBRANTIA (from Terebra, an auger or 

 piercer), consists of insects the females of which are 

 furnished with an ovipositor in the form of a saw, an 

 auger, or other boring instrument. These are the Saw- 

 flies, Woodborers, Gallflies, and Ichneumons. 



Section 2. ACULEATA (from aculeus, a sting or prickle), 

 consists of insects of which the females and the neuters 

 (i.e., the imperfect females) are furnished with a sting. 



These are the Ants, Sandwasps, Wasps, and Bees. 



