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Grasshoppers of Wyoming and the West


Finned Grasshopper

Trachyrhachys aspera Scudder 

Fig. 1, First instar Body Length 5.1-5.7 mm, Femur Length 2.9-3.2 mm, Antennal Segments 12.

Fig. 2, Second instar BL 5.7-6.5 mm, FL 3.7-4.3 mm, AS 14-15.

Fig. 3, Third Instar BL 7.5-9 mm, FL 4.4-4.5 mm, AS 16-17.

Fig. 4, Fourth Instar BL 9-11 mm, FL 5.7-7 mm, AS 17-18.

Fig. 5, Fifth Instar Male BL 13 mm, FL 8-8.5 mm, AS 20;
Female BL 16.7-17 mm, FL 8.7-8.8 mm, AS 19-20.

Fig. 10, Trachyrhachys aspera clutch of eggs.

Top of the Fact Sheet


Adults of T. aspera

Nymphs of Next Species in Subfamily: Trachyrhachys kiowa

Nymphs of Previous Species in Subfamily: Spharagemon equale

List of Species Fact Sheets

Field Guide Contents

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Scott Schell

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Phone: (307) 766-2508


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