Muscoid fly

7089.        Good afternoon, I’m trying to identify what I belied to be pupa in my garage. They are approximately 3-5mm in length and resemble to size and shape of mouse droppings. However they are light brown and appear to have “stripes” or articulated joints. I usually find them in collections of 10-20 at a time. I’d like to identify them to determine if they are a problem and how to get rid of them. Thank you. Ontario

Number 7089. These are the empty pupal cases of a muscoid fly (the group that includes house flies and their relatives). When the larvae (maggots) of these flies finish feeding, they often will then leave their food source and crawl away in order to find a drier place to undergo pupation.