Request for ID from our friends in Bangladesh

[Silverstreak]

Posting on behalf of our new member Sabbir,

Dr. Seow ,

This has been narrowed down by our friends as follows :


The recorded Four-line-blue in Bangladesh / India and close neighbouring countries/region are :

#1
Nacaduba angusta (White Lineblue) Possible .....eliminated-- distinct mariginal and submargibal marking

#2
Nacaduba pactolus (Large Fourlineblue) Possible ..... unlikely Does not show distinct UNF cell end bar characteristic

#3
Nacaduba pavana (Small Fourlineblue)Possible..... eliminated on UNH submarginal band spot 6&7 characteristic

#4
Nacaduba hermus (Pale Fourlineblue) Possible

#5
Nacaduba subperusia (Violet Fourlineblue) Possible

#6
Nacaduba sanaya (Jewel Fourlineblue) possible

#7
Nacaduba ollyetti (Woodhouse‟s Fourlineblue) .. eliminated Recorded only in Sri Lanka


They are unable to proceed further due to lack of references :

Your Kind assistance please ! :)

[Sabbir]

Thanks A lot Sunny Bhai !

[Psyche]

It is N. pavana.

Of the 4-line blues only pavana (& russelli) have dark striae within the white lines forming the bands.
N. pavana is also one of the few 4-line blue with metallic blue scales in the large tornal spot.

TL Seow : Cheers.

[Sabbir]

Thanks Dr. Seow Sir for the help .

[Sabbir]

23265


Please say if it is also the Same Species
Dr. Seow ,

This has been narrowed down by our friends as follows :


The recorded Four-line-blue in Bangladesh / India and close neighbouring countries/region are :

#1
Nacaduba angusta (White Lineblue) Possible .....eliminated-- distinct mariginal and submargibal marking

#2
Nacaduba pactolus (Large Fourlineblue) Possible ..... unlikely Does not show distinct UNF cell end bar characteristic

#3
Nacaduba pavana (Small Fourlineblue)Possible..... eliminated on UNH submarginal band spot 6&7 characteristic

#4
Nacaduba hermus (Pale Fourlineblue) Possible

#5
Nacaduba subperusia (Violet Fourlineblue) Possible

#6
Nacaduba sanaya (Jewel Fourlineblue) possible

#7
Nacaduba ollyetti (Woodhouse‟s Fourlineblue) .. eliminated Recorded only in Sri Lanka


They are unable to proceed further due to lack of references :

Your Kind assistance please !

[Psyche]

It is definitely N. pavana.
There is only one 4-line species in your area where there are dark striae within the white lines.

Two other 4-line species with dark striae within the white lines are.

N. russelli :large submarginal spots ; P. Thailand to Singapore.
http://yutaka.it-n.jp/lyc4/81270001.html

N. ollyetti Sri lankan endemic; dark striae poorly formed.
http://www.slbutterflies.lk/Image.php?cid=152&pid=446

TL Seow :Cheers.