Montana Field Guide

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Home - Other Field Guides
- Kingdom - Animals - Animalia
  - Phylum - Spiders, Insects, and Crustaceans - Arthropoda
    - Class - Insects - Insecta
      - Order - Grasshoppers - Orthoptera
        
        Family - Short-horned Grasshoppers - Acrididae
        
        Species - Rehn's Slow Grasshopper - Argiacris rehni

Rehn's Slow Grasshopper - Argiacris rehni

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Special Status Species
Native Species

Global Rank: G2G3
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:

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General Description

A rather large, robust, short-winged grasshopper. Color is dark brownish dorsally, pale on face and ventrally. Wings (tegmina) are broad, but short and tapering to a point and shorter than pronotum (Hebard 1928, Helfer 1971, and Vickery and Kevan 1985).

Phenology

Specimens collected, 1905, early July to early September (Hebard 1928).

Diagnostic Characteristics

Body length for males 16.9-22.3 mm, females 27.9-29.4 mm. Hind femur has two broad transverse oblique blackish bands that cross the dorsal surface. Femur interior ventral surfaces are brilliant pink, as are the hind tibiae (Vickery and Kevan 1985).

Species Range

Montana Range Range Descriptions

Native

Range Comments

Seems to be confined to southern Montana, with confirmed reports for 3 counties (Vickery and Kevan 1985, Scott 2010). Hebard (1928) reports “Known only from Livingston, MT.”

Observations in Montana Natural Heritage Program Database

Number of Observations: 3

(Click on the following maps and charts to see full sized version) Map Help and Descriptions

Relative Density

Recency

(Observations spanning multiple months or years are excluded from time charts)

Habitat

Collected at 5000 feet, on ground with scanty vegetation “with tufts of a peculiar wooly plant...its discovery indicating that its distribution is probably not extensive and… extremely local, limited to small areas where…a certain type of vegetation is developed.” (Hebard 1928).

References

Literature Cited AboveLegend: View Online Publication
- Hebard, M. 1928. The Orthoptera of Montana. Proceedings of the Academy of Natural Sciences of Philadelphia, Vol. 80:211-306.
- Helfer, J.R. 1971. How to Know the Grasshoppers, Crickets, Cockroaches, and Their Allies. Revised edition (out of print), Mineola, NY: Dover Publications.
- Scott, R.D. 2010. Montana Grasshoppers, Katydids, and Crickets A Pictorial Field Guide to the Orthoptera. MagpieMTGraphics, Billings, MT.
- Vickery, V. R. and D. K. M. Kevan. 1985. The grasshopper, crickets, and related insects of Canada and adjacent regions. Biosystematics Research Institute, Ottawa, Ontario. Publication Number 1777. 918 pp.
Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?
- Capinera, J.L., R.D. Scott, and T.J. Walker. 2004. Field Guide to Grasshoppers, Katydids, and Crickets of the United States. Ithaca, NY. Cornell University Press.
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Citation for data on this website:
Rehn's Slow Grasshopper — Argiacris rehni. Montana Field Guide. Montana Natural Heritage Program. Retrieved on April 20, 2024, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=IIORTB2040