Eleodes hispilabris

Eleodes hispilabris can be distinguished from the similar and sympatric Eleodes suturalis by its flattened elytra that lack sharp lateral carinae, and by its pronotum which is not broadly explanate. Both species may display a reddish-brown sutural stripe, making this trait unreliable for separation. E. suturalis has distinctly laterally carinate elytra and a broadly explanate pronotum. E. acuta, which also occurs in the same region and shares the reddish sutural stripe, averages larger (around 30 mm vs. under 26 mm for E. suturalis) and has rounded rather than upturned lateral pronotal borders.

Arid and semi-arid environments including mixed-grass prairie and desert regions. Exhibits scale-dependent habitat selection: at fine scales, selects microhabitats based on vegetation structure and soil characteristics; at larger scales, responds to broader landscape features. Distribution in the Rattlesnake Hills has been documented in relation to elevation and temperature gradients.

North America: occurs in the Great Plains region including Oklahoma, Kansas, South Dakota, and extends into New Mexico. Also recorded from Mexico.

Adults have been observed active in July; specific seasonal patterns otherwise not documented.

Performs the defensive 'head stand' characteristic of Eleodes, in which the beetle raises its abdomen and supports itself on its head when disturbed. Exhibits scale-dependent habitat selection, responding to vegetation and soil characteristics at fine spatial scales and to broader landscape features at larger scales.

Subject of ecological research on habitat selection and elevational distribution. Occasionally collected by entomologists; can be confused with other Eleodes species of interest such as E. suturalis.

• Eleodes suturalisShares similar size, black coloration with reddish-brown sutural stripe, and occurs sympatrically in the Great Plains. Distinguished by sharply laterally carinate elytra and broadly explanate pronotum.
• Eleodes acutaAlso shares reddish sutural stripe and similar distribution. Distinguished by larger average size (around 30 mm vs. smaller E. suturalis and E. hispilabris) and rounded (not upturned) lateral pronotal borders.
• Amblycheila cylindriformisA tiger beetle that may exhibit mimetic association with Eleodes suturalis due to similarity in size, shape, and coloration; E. hispilabris has been mistaken for E. suturalis in this context.

• darkling beetle
• desert beetle
• defensive behavior
• habitat selection
• Great Plains fauna

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• The real Eleodes suturalis… | Beetles In The Bush
• Scale-dependent Habitat Selection by the Darkling Beetle Eleodes hispilabris (Coleoptera: Tenebrionidae)
• Observations on the Distribution of Eleodes hispilabris (Say) (Coleoptera: Tenebrionidae) in Relation to Elevation and Temperature in the Rattlesnake Hills