Knowledgebase

Devils Coach Horse Beetle #773824

Asked October 01, 2021, 1:59 PM EDT

How can I tell the difference between a male and female devils coach horse beetle.

Clatsop County Oregon

Expert Response

Hi Kalani,

That's a neat question and I didn't know the answer myself. As a result, I asked a specialist who studies the devil's coach horse, Ocypus olens, and other related rove beetles (Order: Coleptera, Family: Staphylinidae). The specialist I consulted is Dr. Adam Brunke. Here is what he wrote...

"If you flip the beetles over, check the final segment of the abdomen. The ventral plate will have a V-shaped notch in the males, while females will have no notch. This is particularly obvious in O. olens, but other rove beetles will have much fainter differences and some genera have no discernable differences."

Hope that helps!

Bill Gerth Replied October 05, 2021, 12:15 PM EDT

Loading ...