Sketching in lino, Part I

A couple of art nights ago I let myself just "sketch" in lino.... apparently I had bugs on the mind since both prints turned out to feature bugs. Here's the smaller of the two:



I can't figure out a consistent way to cut nice-looking circles in lino. I think I want to make friends with a dermatologist so I can appropriate one (or more) of those sharp little tools that punch out perfect circles from skin that's going to be biopsied. I bet those would work on lino.