the shcefer bug sorry dont know the spelling

hi all could anyone tell me about the shcefer bug , just been t uk for a wisit and my grass was not perfect but ok , had a friend watering it came back and in places its gone awfull and is dieing as a coincidence visited kevs sister and she has had said bug in her lawn there is a big bare patch in the middle where they ate the roots of the grass so im wondering if i have something similar to me it looks a bit frazzled but im told its been well watered .
chrissie b

Japanese beetle grubs can really do serious damage to lawns as well. Have you seen the actual chafer bugs or do you have white grub worms in the soil?

Do they look like the 2nd beetle on this page?

http://urbanext.illinois.edu/lawnfaqs/grubs.html