Put the summary of the bug you're having here

What I expected to happen was...:
The endermite to look like a purple silverfish with purple particles.

What actually happened was...:
The endermite had only two-three parts of his little body there and there were no particles.

Steps to Reproduce:
1. Launch Creative mode.
2. Select the "Endermite Spawn Egg"
3.Spawn the Endermite.
4. Look.