1917.] NATURAL SCIENCES OF PHILADELPHIA. 273 



Melanoplus complanatipes Scuddcr. 



1897. Melonoplu.^ complanatipes Scudder, Proc. U. S. Nat. Mus., XX, 

 p. 298, PI. XIX, fig. 10. [Cape St. Lucas, Lower California; Sonora, 

 Mexico.] 



San Jose del Cabo, Lower California, 13c?', 14 9, 2 juv., (dried AlcohoUc), 

 [Hebard Cln. and California Acad. Sci.]. 



Melanoplus pictus brownii Caudell. 



1902. Melanoplus brownii Caudell, Can. Ent., XXXIV, p. 169. [d^, 9, 

 Yuma, Ai'izona.] 



Study of the single types of M. pictus Scudder and M. brownii 

 Caudell and large series of the latter condition before us, offers 

 satisfactory evidence that brownii must be considered a geographic 

 race of pictus. Full comparisons will be made in a study of North 

 American Melanopli found North of Mexico. 



Hermosillo, Sonora, IV, 1897, (A. Koebele), Id", [Hebard Cln.]. 



Melanoplus cinereus cyanipes Scudder. 



1897. Melanoplus cyanipes Scudder, Proc. U. S. Nat. Mus., XX, p. 295, 

 PI. XIX, fig. S. [d', 9 ; Los Angeles, Pasadena and San Diego, Cali- 

 fornia.] 



Careful consideration of the types of cinereus Scudder and the 

 single type of cyanipes Scudder and large series of these and other 

 closeh' related conditions, shows conclusively that cyanipes represents 

 a geographic race of cinereus, which species develops still other 

 geographic races over its wide distribution in the western United 

 States. These will be treated in full in a forthcoming paper on the 

 Melanopli of North America found North of Mexico. 



San Quentin, Lower California, V, 1889, (C. D. Haines), Icf, 

 [Hebard Cln.]. 



Phoetaliotes nebrascensis (Thomas). 



1872. P[ezotettix] nebrascensis Thomas, Prelim. Rept. U. S. Geol. Surv. 

 ^Montana and Terr., V, p. 455. [ 9 , Nebraska.] 



Colonia Garcia, Chihuahua, (C. H. T. Townsend), 2c?', (macropterous), 



[Hebard Cln.]. 

 Durango, Dm-ango, (E. Palmer), Icf, [M. C. Z.]. 



Guanajuato, Guanajuato, (A. Duges), Id^, (macropterous), [U. S. N. M.]. 

 Cordoba, Vera Cruz, IX, 28, Ic^, 1 9 , [Cornell Univ. Cln.]. 



We find that four Mexican genera, Philocleon, Perixerus, Poeci- 

 lotettix and Dactylotum,^'^ show a distinct divergence from the true 

 Melanopli, but insufficiency of material prevents us from determining 

 whether these should be referred to a separate group, the Dactyloti. 

 The forms all have a broad, blunt vertex, showing some depression, 

 this often transverse, between the eyes; the prozona inflated, rounding 



3* There is little doubt but that Poepedetes Saussure is a synonym of Dactylotum 

 Charpentier. 



