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Species Trigonopeltastes delta - Delta Flower Scarab

Delta Flower Scarab - Trigonopeltastes delta Trigonopeltastes delta - male - female Delta Flower Scarab? - Trigonopeltastes delta Delta Flower Scarab? - Trigonopeltastes delta Orange Beetle - Trigonopeltastes delta Trigonopeltastes delta Forster - Trigonopeltastes delta delta scarab - Trigonopeltastes delta
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)
Superfamily Scarabaeoidea (Scarab, Stag and Bess Beetles)
Family Scarabaeidae (Scarab Beetles)
Subfamily Cetoniinae (Fruit and Flower Chafers)
Tribe Trichiini
Genus Trigonopeltastes
Species delta (Delta Flower Scarab)
Other Common Names
"D Beetle"
Synonyms and other taxonomic changes
Trigonopeltastes delta (Forster)
Orig. Comb: Scarabaeus delta Forster, 1771
Explanation of Names
delta - refers to the triangular pattern on the pronotum, which resembles the Greek letter, Delta, i.e., Δ.
2 spp. n. of Mex. (2nd sp. endemic to FL) (1)
8-11 mm (2)
Distinctive medium-sized beetle with yellow-orange to brown and black elytra, with striking triangular pattern on pronotum.

Spmn from central Texas
e US (TX-FL-NJ-KS) (3)
Meadows with flowers.
mostly: May-Aug (BG data)
Adults take pollen and/or nectar. (Possibly eat vegetative parts as well?) Food plants include Goldenrod (Solidago), Feverfew (Parthenium), Coneflower (Echinacea), and Rattlesnake Master (Eryngium yuccafolium).
Life Cycle
Mating occurs on flowers. Larvae are found in decaying wood, e.g., stumps, and have also been found in bromeliads.
T. delta was found to be one of the most common beetles in a study of flower-visiting insects in the Everglades National Park. It was found on 13 different plant species. One of the most amazing observations was of mass aggregations of Trigonopeltastes delta numbering in the thousands on the very large inflorescences of Sabal palm (Sabal palmetto). (4)
Perhaps the Delta pattern on the pronotum, combined with the orange coloration of the elytra is mimicry of wasps, such as...
Paper Wasp, Polistes fuscatus/Southern Yellowjacket, Vespula squamosa
See Also
Trichiotinus, but pattern of this species distinctive
Print References
Brimley, p. 208 (5)
Deyrup and Kenney, Florida's Fabulous Insects, page 95 (6)
Harpootlian, p. 122, fig. 241 (2)
White, Field Guide to the Beetles, plate 8 (7)
Pascarella, J.B., Waddington, K.D., & Neal, P.R. 2001. Non-apoid flower-visiting fauna of Everglades National Park, Florida. Biodiversity and Conservation, 10(4): 551–566. (4)
Internet References
Texas Entomology - Mike Quinn, 2011
Works Cited
1.American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea
Arnett, R.H., Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). 2002. CRC Press LLC, Boca Raton, FL.
2.Scarab beetles (Coleoptera: Scarabaeidae) of South Carolina
Phillip J. Harpootlian. 2001. Clemson University Public Service.
3. A distributional checklist of the beetles (Coleoptera) of Florida.
Peck & Thomas. 1998. Florida Department of Agriculture and Consumer Services, Gainesville. 180 pp.
4.Non-apoid flower-visiting fauna of Everglades National Park, Florida.
Pascarella, J.B., K.D. Waddington & P.R. Neal. 2001. Biodiversity and Conservation, 10(4): 551–566.
5.Insects of North Carolina
C.S. Brimley. 1938. North Carolina Department of Agriculture.
6.Florida's Fabulous Insects
Mark Deyrup, Brian Kenney, Thomas C. Emmel. 2000. World Publications.
7.Peterson Field Guides: Beetles
Richard E. White. 1983. Houghton Mifflin Company.