344 



COLLEGE ZOOLOGY 



FIG. 272. Order ORTHOPTERA. Rocky Moun- 

 tain grasshopper or locust, Melanoplus sprelus. 



a, a, a, females in different positions, laying eggs; 



b, egg-pod taken from ground, with end broken 

 open; c, eggs lying loose on ground; d, e, earth 

 partly removed to show egg mass in place (e) and 

 one being' placed (d); f, where egg mass has been 

 covered up. (After Riley, from Yearbook Dept. 

 Agric., 1908.) 



FIG. 271. Order OR- 

 THOPTERA. The north- 

 ern " walking-stick," 

 Diapheromera femorala. 

 (From Davenport.) 



FIG. 274. Order 

 ORTHOPTERA. 

 House-cricket, Gryl- 

 lus domestic us. 

 (From the Cam- 

 bridge Natural His- 

 tory.) 



FIG. 273. Order ORTHOPTERA. Katydid, Microcentrum retinerve. 

 (From Sedgwick's Zoology, after Riley.) 



