FORM, GROWTH, AND CHANGE 33 



young of such a grasshopper or locust as that whose fully 

 developed form has been summarized in this chapter. The 

 female of such an insect works her abdomen quickly but care- 

 fully into the ground, and lays her eggs in the soil (Fig. 18 A, B), 





D 



FIG. l8. EGG-LAYING OF THE ROCKY MOUNTAIN LOCUST (CdlopteHUS SpretUS). 



A, Females (a a) depositing their egg-clusters (d e) in the soil ; 6, an egg-cluster ; c, scattered 

 eggs on the surface. Natural size. B, Tip of female's abdomen showing ovipositor holding 

 e gg ' X 3- C, Egg-clusters ; a, side view ; b, from beneath ; c, from above, x 3. D, Embryo 

 enclosed in amnion (note the long hind-leg), cervical ampulla at c. x 20. From Riley, 

 Entom. Bull. 25, 17.S. Dept. Agric. 



surrounding them with a gelatinous secretion which, by fasten- 

 ing together particles of earth, builds up a tubular egg-case 

 closed at the top by a lid. When the young locusts emerge 

 from the egg-shells they present an extensive dorsal area of 

 flexible cuticle (Fig. 18 DC), behind the head and in front of the 



3 



