302 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



Measurements (length in millimeters) of representative speci- 

 men: Body, 29; pronotum, 5.9; front femur, 5.5; hind femur, 16; 

 tegmen, 5. 



Female. — Very much like humphreysii except in color, which 

 agrees with that of the male. 



Measurements (length in millimeters) of a paratype: Body, 

 33 ; pronotum, 7 ; front femur, 5.5 ; hind femur, 19.3 ; tegmen, 6. 



Pronotal length of males varies from 5.7 (Venvidio) to 6.5 mm. 

 (Villa Union), body length from 25.5 (Compostela) to 29.5 mm. 

 (Villa Union). Females are recorded by Hebard (1925) as ranging 

 from 6.7 (Venvidio) to 8 mm. (Villa Union) in pronotal length, 

 from 28.3 to 37.2 mm. in body length. 



Type. — A male in the Academy of Natural Sciences of Phila- 

 delphia, collected August 28, 1918, by J. A. Kusche, and designated 

 in the original description. 



Type locality. — Venvidio, Sinaloa, Mexico (Venvidio is evi- 

 dently near Los Mochis). 



In addition to the type locality, the species is known from only 

 two localities, from both of which I have seen material: Villa 

 Union (about 15 miles southeast of Mazatlan), Sinaloa, Mexico. 

 Vicinity of Compostela (about 25 miles south of Tepic) , Nayarit, 

 Mexico. 



The male from Compostela is the only specimen that has not 

 been recorded previously. 



Records of poecilus from Arizona, and probably all those from 

 Sonora by Ball et al. (1942) and Tinkham (1947) are in error, 

 these applying to either humphreysii or cochisei. 



Adult collection dates range from July 30 (Compostela) to Sep- 

 tember 27 (Villa Union) . No detailed information on habitats is 

 available. The coastal region of Sinaloa and Nayarit belongs to 

 the Tropical Zone, and the conspicuous native vegetation is largely 

 of a scrub nature, chiefly mesquite, yucca, agave, cactus, and other 

 plants. 



BARYTETTIX CRASSUS Scudder 



Figures 61 ; 64, e, f, k 

 Barytettix crassus Scudder, Proc. U. S. Nat. Mus., vol. 20, pp. 27-28, pi. 2, 



fig. 10, 1897; Index North American Orthoptera, p. 37, 1901. — Bruner, 



Biologia Centrali-Americana, orthoptera, vol. 2, p. 305, pi. 4, figs. 8, 8a, 



8b, 9, 1908-1909. — Kirby, Synonymic catalogue of Orthoptera, vol. 3, p. 



494, 1910.— Rehn and Hebard, Proc. Acad. Nat. Sci. Philadelphia, vol. 64 



p. 74, 1912. 

 Conalcaea crassa (Scudder) Hebard, Proc. Acad. Nat. Sci. Philadelphia, vol. 



69, pp. 264, 274, 1917; Trans. Amer. Ent. Soc., vol. 51, p. 290, 1925. 

 Melanoplus nitidus Scudder, Proc. U. S. Nat. Mus., vol. 20, pp. 207-208, 1897 



(in part). 



