Grasshoppers of Wyoming and the West

Entomology

Obscure Grasshopper

Opeia obscura (Thomas)

Table 1. Population fluctuations of grasshoppers in a mixedgrass prairie site of eastern Wyoming (Platte County T28N R 66W Sec 34 NE).

Number per sq yd and (increase rate)
	1968	1969	1970	1971	1972	1973	1974
Ageneotettix deorum	3.4	2.2 (0.6)	0.8 (0.4)	1.2 (1.4)	0.8 (0.7)	1.3 (1.6)	3.3 (2.6)
Opeia obscura	1.9	0.6 (0.3)	0.1 (0.2)	0.1 (1)	0.1 (1)	0.2 (2)	0.9 (4.5)
Assemblage of 19 species	12.8	6.1 (0.5)	2.9 (0.5)	5.6 (1.9)	4.0 (0.7)	3.3 (0.8)	10.5 (3.1)

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