It's probably better to reference the jobs even if it's very brief so that you explain the gap than just to have a period where you've apparently done nothing. There's maybe a judgement call to be made if there's dozens and dozens of jobs in there as it might imply a lack of ability to stick at anything for a decent period but I don't know your employment history so can't say for certain.
As Windle says you don't need to put down why you left a job although I have previously had on my CV a note for particularly short term jobs that they were during a summer break from uni or similar.
Have a look here.
The gap was only 2 months so is it worth it?
Thanks Zombiefan i'll try and implement that.
Compboyo, you're not funny.