These are a few pics of my female Spiny Flower Mantis from L6-L7. I have more photos of this mantis in my gallery on my profile.
The first photo is of the molt from L5-L6. She is eating a mealworm in the second photo at sixth instar and she is seventh instar in the last two photos.
I didn't really keep track of how long it took to reach adulthood. I only have one and so I didn't care to keep track because I knew she would mature however long she took. She is an adult now.