Spotting

Like I said earlier, it's a pity none of the pictures show any of the hind-wing, often it is visible in the innerwing cut-outs at the side of the abdomen, as a splash of colour.
Moths generally can be very difficult at the best of times.
Here in Spain we now have over 5,000 recorded species (up from 4,452 just a few years ago) and possibly nearly as many again unrecorded. Only a fraction of those 5,000 have published photographs and the sheer numbers involved mean that it is unlikely that any single person would be able to positively identify all those seen with 100% accuracy. We just keep posting photographs of what we see to build the picture and hope that the database is kept for future generations to peruse and study.

;-)May be ,Hippotion rosetta?

http://sphingidae.myspecies.info/taxonom...
http://img.webme.com/pic/h/hfunk1943/hip...
https://en.m.wikipedia.org/wiki/Hippotio...

Wow you guys are really looking hard for an ID for this spotting and I really appreciate it, Malcolm and Irina :)

May be you're right.I was stopped by two things:1). the presence of" golden lateral stripes on the abdome". (T. nessus)(http://sphingidae.myspecies.info/taxonomy/term/2853/descriptions)
and 2). the absence of
"Abdomen upperside with two strong white dorsal lines",(T.oldenlandiae ) "the single white dorsal abdominal line"(T.silhetensis )

It actually looks very close to T. japonica which is only found to the extreme north-east of the Indian sub-continent (Bangladesh/Burma) but T. siltenhensis is said to look very similar to T. japonica so that would be my best guess. Look at the fourth picture on this page http://tpittaway.tripod.com/china/t_sil....

Thank you,Malcolm Wilton-Jones.
There are many species in Theretra Genus of India:
Theretra boisduvalii http://sphingidae.myspecies.info/taxonom...
Theretra clotho. http://sphingidae.myspecies.info/taxonom...
Theretra castanea http://sphingidae.myspecies.info/taxonom...
Theretra gnoma http://sphingidae.myspecies.info/taxonom...
Theretra griseomarginata http://sphingidae.myspecies.info/taxonom...
Theretra insignis. http://sphingidae.myspecies.info/taxonom...
Theretra lycetus. http://sphingidae.myspecies.info/taxonom...
Theretra nessus. http://sphingidae.myspecies.info/taxonom...
Theretra oldenlandiae. http://sphingidae.myspecies.info/taxonom...
Theretra pallicosta. http://sphingidae.myspecies.info/taxonom...
Theretra silhetensis.
http://sphingidae.myspecies.info/taxonom...

In my opinion,the best similar Theretra nessus, Theretra silhetensis,Theretra oldenlandiae.And what are you think about it?

I would agree with Theretra Genus but the position of the darker bar on the wings, clearer in the second picture suggests one of the other Theretra species may be more likely. There are about 60 species listed here https://en.wikipedia.org/wiki/Theretra and many look similar so care is needed.

I feel,the name of this moth is Theretra nessus
http://eol.org/pages/638087/media

http://eol.org/pages/638087/maps

Thanks, that could put it close to 100mm wingspan. I have not been able to find a match yet. A pity the underwing is not partially visible as that would help.

It was about an 2 inches wide Malcolm !

The shape suggests Hawk Moth of some sort, to me anyway. Any estimated size?