Egg Identification

[willow]

Hey all, could you help me identify what these are. I think they are eggs, they are on the underside of my jigsaw seedling. The only critters around that I have seen and killed at the moment are flea beetles, had a little damage but just the odd one for now, these do not look like flea beetle eggs that I have seen online but I am sure they do not all look the same. Any help would be great, I do not want to destroy them if they are something helpful. Edit: Further inspection shows 3-4 seedlings with the same eggs some on top and some below the leaves about 5-10 in each group.
 

 
Also this little fella is stiing at the tip of my choc fatalii, I do not see any damage but identification would be great, do I need to search and destroy or give him a wide berth. Could not quite get it in focus, has two long antenna

 

[willow]

So my local man says the first are butterfly eggs. They hatch into little caterpillars that live in the soil and munch the plants at night, they did a number on some of my basil and passion fruit. He knows somethings but often makes stuff up I think So any thoughts are welcome. I should him the little critter on the leaf he just squished it and said malo (bad) That is all I got from him on this one

 

[haiku]

I have not seen eggs like those. Perhaps you have received no other responses, yet, because others here have not seen them, either.  

 

[spicefreak]

I've seen them and I've had caterpillars but can't be certain the two are connected.

 

[JDFan]

Cut the leaf off and place in a lidded jar with a few holes to let airflow and you should find out what type of eggs they are in awhile when they start to hatch.

 

[willow]

Cut the leaf off and place in a lidded jar with a few holes to let airflow and you should find out what type of eggs they are in awhile when they start to hatch.

I am away for 4 weeks. Hopefully the plants are looked after, if these eggs are still turning up when I get back I will most definitely do this.