What is this insect?

Asked May 22, 2017, 9:00 PM EDT

I found these in my boat house in northern MN. What are they?

St. Louis County Minnesota

6 Responses

I think they are too long for a silverfish. These are 3/4" - 1". I have attached another pictures.
Thanks for the help.

The area has not been underwater, has it?

Not underwater but water has been in the boat house over the years. Debris has been washed into it. This boat house was built in early 50s

Hard to be 100% sure, but it may be mayfly nymphs. Since they appear wingless, they may have gone into the storage boathouse until they emerge in their adult form.

I think you may be right. I looked them up online and they do appear very similar. thanks for the help!!!