Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Cysteodemus armatus - Inflated Beetle

Inflated Beetle - Cysteodemus armatus Cysteodemus armatus - male - female Cysteodemus armatus Cysteodemus armatus (white pruinose form) - Cysteodemus armatus Inflated Beetle - Cysteodemus armatus Stone Beetle - Cysteodemus armatus Inflated Blister Beetle? - Cysteodemus armatus Weird Bug- looks like from space! - Cysteodemus armatus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Longhorn, Leaf and Snout Beetles)
Superfamily Tenebrionoidea (Fungus, Bark, Darkling and Blister Beetles)
Family Meloidae (Blister Beetles)
Genus Cysteodemus (Desert Spider Beetles)
Species armatus (Inflated Beetle)
Explanation of Names
cyst, =is, -o (G). The bladder; a bag
demas (G). A living body (1)
Inflated Beetle used in (2)
Numbers
Two species of Cysteodemus (3)
Size
7-18 mm
Identification
Flightless; distinguished from all other meloid beetles by its inflated (air space below elytra may serve as insulation), spheroid, fused elytra. Elytra are coarsely pitted, and often covered with a white to yellowish secretion. (Adapted from Evans & Hogue. 2006. See References)
Range
California, Arizona, and Nevada. (2)
Habitat
Found in Mojave and Colorado Deserts (2)
Season
Spring (2)
Food
Larrea tridentata, Acamptopappus sphaerocephalus, Chaenactis spp., Geraea canescens, Palafoxia arida, Gilia spp., Loeseliastrum matthewsii, Tiquilia spp.
Life Cycle
Larvae have been found in subterranean nests of solitary bees ((2))
Print References
Powell and Hogue, p. 294, fig. 318 (4)

Evans & Hogue, p.226, & plate 212 (2)
Works Cited
1.Dictionary of Word Roots and Combining Forms
By Donald J. Borror
2.Field Guide to Beetles of California
By Arthur V. Evans and James N. Hogue
3.American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea
By Arnett, R.H., Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.)
4.California Insects
By Jerry A. Powell, Charles L. Hogue