Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

BugGuide is a National Moth Week Partner. How to add your National Moth Week 2021 photos. July 17-25.

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

National Moth Week 2020 photos of insects and people.

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

Discussion, 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

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Previous events

Elaphropus? - Tachys potomaca

Elaphropus? - Tachys potomaca
Sharon, Norfolk County, Massachusetts, USA
April 10, 2010
Size: 2.2mm

Moved from Paratachys pumilus.
Thanks Peter.

Moved from Ground Beetles.
Thanks Peter, it's a new one for me.

Paratachys pumilus
based on my microscopic examination of three such specimens from same collection event and so no one-to-one photo-vouchering here. Thanks Tom.

Changed to Paratachys potomaca Erwin, 1981
based on a review of the literature and re-examination of three specimens with same collection event. One of them with separated elytra revealed markedly reduced membranous wings characteristic of P. potomaca. Also characteristic are smaller, less convex eyes and the elytra shaped more oviform with more narrowed shoulders compared to very similar P. pumilus. Known geographic range of P. potomaca is MA, MD, NC, and VA. Paratachys is a genus notoriously difficult to separate the species.

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.