Ever seen a Narrow-bordered Bee Hawk-moth (Hemaris tityus)?

From what I can gather, this is a Narrow-bordered Bee Hawk-moth (Hemaris tityus). Apparently, it's pretty uncommon and until the other day, I'm sure hadn't ever seen it.

http://tpittaway.tripod.com/china/h_tit.htm
http://en.wikipedia.org/wiki/Hemaris_tityus
http://www.arkive.org/narrow-bordered-bee-hawk-moth/hemaris-tityus/
http://www.ukbap.org.uk/UKPlans.aspx?ID=358