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Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

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Previous events


Species Sphenophorus parvulus - Bluegrass Billbug

Billbug - Sphenophorus parvulus Billbug - Sphenophorus parvulus Billbug - Sphenophorus parvulus LSAM billbug 22   - Sphenophorus parvulus LSAM billbug 23   - Sphenophorus parvulus Sphenophorus parvulus Sphenophorus parvulus? - Sphenophorus parvulus Sphenophorus venatus ? - Sphenophorus parvulus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Curculionoidea (Snout and Bark Beetles)
Family Curculionidae (Snout and Bark Beetles)
Subfamily Dryophthorinae
Tribe Rhynchophorini
Subtribe Sphenophorina
Genus Sphenophorus (Billbugs)
Species parvulus (Bluegrass Billbug)
Explanation of Names
Sphenophorus parvulus Gyllenhal 1838
parvulus = 'small'
6-8 mm(1)
Small, slender; black but usually coated with opaque gray, pronotum evenly, densely punctured all over except sometimes for median line of varying length, elytra with sinuous intervals. Differs from the similar S. minimus (that also occurs in the same area) in having much denser pronotal punctures, more rounded front angles of the pronotum, and no complete opaque coat covering the raised areas and punctures(1)
NS-FL to ON-ID-NM(2)(1)(3)(4)
preferred host: Kentucky blue grass (Poa pratensis), but more polyphagous than other congeners(1)
may severely damage lawns(5)
Works Cited
1.Revision of the genus Calendra (formerly Sphenophorus) in the United States and Mexico (Coleoptera, Curculionidae)
Vaurie, Patricia. 1951. American Museum of Natural History.
2. A distributional checklist of the beetles (Coleoptera) of Florida.
Peck & Thomas. 1998. Florida Department of Agriculture and Consumer Services, Gainesville. 180 pp.
3.The weevils (Coleoptera: Curculionoidea) of the Maritime Provinces of Canada, II: New records from Nova Scotia...
C.G. Majka, R.S. Anderson, & D.B. McCorquodale. 2007. The Canadian Entomologist 139: 397–442.
4.New Coleoptera records from New Brunswick, Canada: Anthribidae, Brentidae, Dryophthoridae, Brachyceridae, and Curculionidae...
Webster R.P., Anderson R.S., Sweeney J.D., Demerchant I. 2012. Zookeys 179: 349-406.
5.Diseases and pests of ornamental plants, 5th Edition
Pirone P.P. 1978. Wiley, 584 pp.