ID help please

[atronox]

Very nice Z. ogygia! Hope to find it someday

[Banded Yeoman]

Uncle Seow, thanks for the pointers! The two A. pseudomuta where observed within the same area. It seems to be the typical form found around there.

Aaron, thanks! It appears that they are found from time to time at USR. As for mine... Well, you know where it was shot.

[Psyche]

Quite right all.


TL Seow: Cheers.

[Banded Yeoman]

Dr Seow, Aaron, I believe I've shot the males of all our six-line Nacaduba species over the weekend. Are these IDs valid?

1) Nacaduba beroe


Upperside: no white scaling, does not appear powdery.





2) Nacaduba berenice


Upperside, as visible in the first shot as well, powdery blue with white scaling visible.




3) Nacaduba calauria


Upperside: visibly darker than the other Nacaduba species flying around (presumably all N. berenice)

[Psyche]

They are as you indicated.

Notice the male N. berenice here is unusual in that the dark striae within the postdiscal band are largely missing. This is normally a feature of the N. beroe male.
Here is a more typical male N. berenice with the dark striae very strong.
http://www.butterflycircle.com/check...hee%20Beng.jpg

You missed the N. kurava male.


TL Seow: Cheers.

[Banded Yeoman]

Hmm. Comparing the N. beroe male and the N. berenice, it is still apparent that the dark striae are less developed in beroe.

Also, you're quite right I missed out N. kurava... I completely forgot about it! I'll try and get a shot next time.

[atronox]

The first one is Ionolyce helicon. The wing shape and the post-discal striae on the forewing in space CuA1 give it away. I've shot many of these hoping that one of them would turn out to be N. beroe. N. beroe seems rare- i've not seen one yet.

[Banded Yeoman]

Aaron, Dr Seow, I believe this is the next fourline-blue on our list: Nacaduba hermus.

Upperside is violet-blue.
ID confirmed as Nacaduba hermus

[atronox]

Yes, it can only be hermus. What an exciting find! Pretty soon you'll probably get a clear shot of N. pendleburyi to complete the rarer four-lines

USR?

[Psyche]

Wonderful! You got it right.

There are several species recorded from Singapore in the past.


Nacaduba 4-lines with the dark striae absent or weak.

A. HW with the marginal & submarginal spots wider apart. 1. N. sanaya & 2 .pendleburyi.
B. HW with the marginal & submarginal spots near to each other 3. N. subperusia & 4. N. hermus.

N. hermus : HW black spot with metallic scales.
http://www.ifoundbutterflies.org/med...gale_ab589.jpg

N. subperusia ;HW black spot without metallic scales.
http://3.bp.blogspot.com/-CCzm1ZlQsQ...rusia+lysa.jpg


TL Seow: Cheers.