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Upcoming Events

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

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Subfamily Dytiscinae

Big Beetle found dead on our deck - Dytiscus harrisii Large Diving Beetle (Dytiscus sp?) - Dytiscus verticalis Dytiscus marginicollis? - Dytiscus marginicollis Dytiscus carolinus - female Acilius sp? - Acilius fraternus Dytiscidae? maybe Eretes sp. - Thermonectus sibleyi Dytiscus beetle - Dytiscus dauricus - female Thermonectus intermedius - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Dytiscidae (Predaceous Diving Beetles)
Subfamily Dytiscinae
~40 spp. in 6 genera of 4 tribes in our area, >250 spp. in 12 genera of 5 tribes total(1)
8-40 mm (Nearctic species)
Eyes unnotched at antennal bases
scutellum visible
male protarsomeres 1-3 modified to form a broad oval palette, often with suckers on the ventral surface (used to grasp the female during mating)
Anterior margin of the clypeus (frontoclypeus) is rounded
anteroventral margin of femur and tibia with a fringe of swimming hairs
abdominal segments 7 and 8 fringed laterally with swimming hairs
Works Cited
1.A World Catalogue of the Family Dytiscidae, or the Diving Beetles (Coleoptera, Adephaga)
Nilsson and Hajek. 2019. Distributed by authors.