140 Cockroaches, Locusts, Grasshoppers, and Crickets 



miles in area, would be little affected by a bonfire. In Cyprus in 1881, 

 ijcxs tons of locust-eggs were destroyed; how many eggs go to make a ton 

 one can only faintly conceive of. 



There has been no serious Rocky Mountain locust invasion of the Missis- 

 sippi Valley since 1876, and there will probably never be another. The 

 locust is being both fed and fought in its own breeding range; many are 



72. Fig. 175. 



Fig. 172. — The emarginate locust, Schistocerca emarginala, male, (.\fter Lugger; nat- 

 ural size.) 



Fig. 173. — The pale-green locust, Hesperotetlix pralensis, female, (.^fter Lugger; 

 natural size indicated by line.) 



Fig. 174. — The short-winged locust, Slenobolhrus ciirlipennis, female, (.^fter Lugger; 

 natural size indicated by line.) 



Fig. 175. — The sprinkled locust, C/i/(i;a//<j foH.T/>frsi!, male, (.^ftcr Lugger; natural size 

 indicated by line.^ 



killed every year, and for those that are left there is food enough and to spare 

 in the great grain-fields of the northwest plains. 



The genus Melanoplus, to which the Rocky Mountain locust belongs, 

 is the largest of all our Acridiid genera, one hundred and twenty species 

 found in the United States belonging to it. Of these species a very common 

 one all over the country is the red-legged locust, Melanoplus jemur-rubnim 

 (Fig. 167), which is about one inch long, with olivaceous brownish body, 

 clear hind wings and brownish fore wings that have an inconspicuous 

 longitudinal median series of black spots in the basal half (these spots 



