help identifying this egg packet

[Huba Huba]

I have found several of these on my grape leaves in the last week, other than a couple of leaf rollers, I haven't found any numerous insect pest. (Japanese beetles have been a problem but seem to be decreasing recently). I have manually destroyed the ones I found but then thought it would be unfortunate if they were beneficial insects.

 

[Huba Huba]

I believe it may be a species of army worm.