Thank you for your valued response.Based on your 2nd example T. besta male specimen, uploaded species triangular basal spot at space 2 is lightly shaded.And both T. besta and bambusae male stigma extend upto space 1b.
In my post 7, basal spot 2 more prominent and broader as like your example T. besta male specimen no. 2.
Its totally confused for me till now Sir.

Regards,
Rajib Dey