Counterpoint practice

I'm still not satisfied with my counterpoint, so I wrote these two little practice pieces. They're not mentioned for any instruments, but I had to choose something when making an mp3. Also, this is my first finished canon, that is I've written many canonical passages but this is my first standalone finished canon :D What do you think of these?

It's really nice and the part-writing is very good. There are some parallel 8ves in the trio (which are not very easy to notice, though), like m. 5  two B flats in basso & alto, or m. 7 Bb-Eb between the 2nd and 3rd beat of the basso & soprano etc.

Some kind of cadence in the middle of the pieces is missing.