When doing a skateboard trick, what's the difference between a 'melon' and a 'mosquito'?

Mosquito grab
A backside grab where the legs are tweaked back so that the front knee is folded down and possibly touching the back foot, with the back leg in a similar position. VERY similar the melon grab, but the difference mainly in the front leg in a melon grab is mostly straight as well as the front arm, with the board mostly in front of the rider. The mosquito air has the front leg bent to where the front leg is bent and the front foot is close to the front shoulder, where the board is mostly beside the rider.

https://gonesk8ing.wordpress.com/2012/05/27/skateboarding-grab-tricks-explained/