ORTHOPTERA. 109 



while the locusts, which stay near the dull-colored 

 earth, are dingy shades of brown and red. 



The eyes of the grasshopper are smaller than the 

 locust's, while the antennse, though not so stout, are 

 very much longer. The mandibles are light-colored 

 with the exception of the edges, which are horny, 

 showing the effects of work. The palpi of the first 

 pair of maxillae are remarkably long. The mesothorax 

 and metathorax are not consolidated, but move upon 

 each other, and this condition correlates with the 

 structure of the legs and wings, the legs being less 

 muscular than those of locusts, while the wings are 

 leaf-like, having no stiff, chitinous, anterior veins. 



The slight concentration of the thorax; the weak 

 structure of the legs and wings ; the light color of the 

 mandibles ; in brief, the deUcacy of the whole organi- 

 zation, show that the meadow grasshopper is not a 

 strong leaper, good flier, nor voracious eater, hke the 

 more robust locust. The sword-shaped ovipositor 

 (PL IV., Fig. 60, os) is made of four plates, and the 

 edges near its end are horny and saw-like. The 

 corresponding parts in the male (PI. IV., Fig. 59) are 

 used as clasping-organs. 



ACRIDID.^. 

 The genus Caloptenus, as already stated, belongs 

 to this family, and has become familiar through the 

 study of Caloptenus fevioratus. The Rocky Moun- 

 tain locust, Caloptenus spretus, Uhler (for figures, see 

 Standai-d Natural History J p. 197), is similar to Calop- 

 tenus femoratus in structure, but in size it more nearly 

 resembles the common little red-legged locust, Calop- 



