Thanks a lot for the detailed explanation. Now I feel I have graduated in Halpe identification.

Today, we celebrate Teachers' Day in India. So, let me wish you "Happy Teachers' Day" and thank you for all the invaluable knowledge you have imparted on us.

While going through my Halpe collection, and cross checking with the IDs you have given, I came upon this specimen which could be H molta, which seems to have white cilia in addition to other id keys. Kindly have a look.

4. a
4 a.JPG

4. b (same specimen as that of 4.a)
4.jpg

Thanks