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Orussid wasp

Orussus occidentalis

Description:

About 10-12 mm in length, colored as shown. Note antennae inserted very low on face; crown of blunt teeth on top of head.

Habitat:

Found 3-4 specimens running around on a huge old cottonwood log in a grove of live cottonwoods. Surrounding habitat is mostly degraded shortgrass prairie, cholla cacti being the tallest vegetation. Some riparian areas scattered across the ranch.

Notes:

Despite being parasitic on woodboring insects, orussids are most closely related to sawflies.

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BugEric
Spotted by
BugEric

Pueblo, Colorado, USA

Spotted on Apr 21, 2014
Submitted on Apr 25, 2014

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