MELANOPLUS. 321 



Pezotettix spretus, Stal, Bihang till K. Svensk. Vet.-Akad. Handl. v. no. 9, p. 14 (1878) 2 . 

 Melanoplus spretus, Scudd. Proc. Bost. Soc. Nat. Hist. xix. p. 287 (1878) 3 ; Proc. U.S. Nat. Mus. 



xx. p. 184, t. 12. fig. 8 (1897) 4 . 

 Melanoplus spretis, Rehn, Trans. Amer. Ent. Soc. xxvii. p. 98 (1900) 5 . 



Hab. North America, numerous localities west of the Mississippi River and east of 

 the coast range between the Saskatchewan and Rio Grande 1 ~ 4 . — Mexico, Sonora and 

 Chihuahua 4 , % Tacubaya near Mexico city 5 . 



This species is not represented in the " Biologia " collections. It is a more northern 

 insect than the preceding and only temporarily and at long intervals visits Mexican 

 territory during its migratory movements. Rehn's reference is apparently an error. 



[16. Melanoplus devastator, Scudd. 



Melanoplus devastator, Scudd. Proc. Bost. Soc. Nat. Hist. xix. pp. 285-287 (1878) (part.) x ; Proc. 



U.S. Nat. Mus. xx. p. 196, t. 13. figg. 3-7 (1897) \ 

 Caloptenus devastator, Riley, Bull. Div. Ent. U.S. Dept. Agric. ser. i. no. xxv. pp. 28-30, figg. 6 a-d, 



7 a-c (1891) 3 . 



Hab. North America, various localities in California 1-3 . 



The presence of this insect so far south as Tighes would seem to indicate that it 

 extends to Mexican territory.] 



17. Melanoplus humphreysii, Thomas. 



Pezotettix humphreysii, Thorn. Rep. Geol. & Geogr. Expl. W. 100th Merid. v. p. 890 (1875) 1 (part.). 

 Melanoplus humphreysii, Scudd. Proc. U.S. Nat. Mus. xx. p. 206 (1897) 2 . 



Hab. North America, Phoenix, Arizona x 2 (coll. L. Bruner). 

 This insect should also occur a little to the southward in Sonora. 



18. Melanoplus nitidus, Scudd. (Tab. IV. figg. 18, 2 ; 19, 19 a, 6 .) 



Pezotettix humphreysii, Scudd. Proc. Bost. Nat. Hist. xx. p. 85 (1897) l (part.). 

 Melanoplus nitidus, Scudd. Proc. U.S. Nat. Mus. xx. p. 207, t. 14. fig. 2 (1897) \ 



Hab. Lower California, Cape St. Lucas *. — Mexico, Tepic, Jalisco 2 . 



19. Melanoplus aridus, Scudd. 



Pezotettix humphreysii, Thorn. Eep. Geol. & Geogr. Expl. W. 100th Merid. v. p. 890, t. 45. 



figg. 1, 2 (1875) 1 (part.). 

 Pezotettix aridus, Scudd. Proc. Bost. Soc. Nat. Hist. xx. pp. 84, 85 (1879) 2 . 

 Melanoplus aridus, Scudd. Proc. U.S. Nat. Mus. xx. p. 209, t. 14. fig. 3 (1897) 3 ; Rehn, Proc. 



Acad. Nat. Sci. Philad. 1907, p. 51 \ 

 Hab. North America, Arizona 1_4 , Las Cruces, New Mexico and vicinity (Cockerell). 



This and the following species should also occur in Sonora and Chihuahua to the 

 southward. 

 biol. CENTR.-AMER., Orthopt., Vol. II. , November 1908. 2 Tt 



