12 



GENERAL ZOOLOGY 



FIG. 5. Development of Locust 



A, P>, C, D, E, F, stages from nymph to adult, 

 enlarged: A X 6, B x 2, the others slightly 

 enlarged 

 (From Packard's Text-Book of Entomology') 



which form a tubular mass in the 

 third, fourth, and fifth abdominal 

 somites. After fertilization the 

 eggs are covered on the way down 

 the egg-tube by a sticky substance 

 poured out from the cement or 

 colleterial gland (Fig. 3, 33). This 

 gland opens into a capacious 

 pouch (bursa copulatrix, Fig. 3, 34), 

 which rests on and opens directly 

 into the oviduct. 



Development. The eggs of the 

 red-legged locust are laid in the 

 autumn in holes made by the 

 ovipositor of the female, in 

 the ground of fields, pastures, 

 and waysides. They differ in 

 no important respect from the 

 eggs of the Rocky Mountain 

 locust shown in Fig. 4. Each 

 hole contains from twenty to 

 thirty-five eggs. A secretion 

 from the gland already men- 

 tioned binds all the eggs in a 

 single hole into one 

 mass, and when the 

 number is completed 

 more fluid is poured 

 out, which hardens into 

 a firm covering. Here 

 they remain over the 

 winter and hatch out 

 into young locusts in 

 the spring, quite closely 



