Insect and Spider Identification: CLOSED: Help Identifying these insects to family, 1 by Alkalikitty

Alkalikitty wrote:
I am trying to make up an insect collection and have to label them to family.
For the first one, I tried looking up the diptera families but I am having a lot of trouble.

The second one kind of looks like a wasp but the abdomen is flattened (I am not sure if this happened during capture or if it is actually like this)

I have no clue about the third and fourth ones. they were provided and were caught in a malaise (sp?) trap years ago. The last one I am thinking is a kind of wasp due to what loooks like a 'wasp waist' but I kinda suck at identifying

I live in Western Canada if that helps...Any help would be greatly appreciated

Thank you very much