Post 29.
The 4-line Blues are very difficult to Id from the underside alone in many species and it is likely there were many mis-identifications in the past.
The dark striae within the bands are important in the Ids.
A. Dark striae within bands strongly developed ,appearing black.
Metallic scales on HW tornal spots always strong.
B2. Nacaduba pactolus.
White striae buff, enhanced.
Metallic scales on tornal spot strong.
HW submarginal spot 6 quadrate & connect sharply to a narrow band formed by submarginal spots 4 & 5; Distinctive.
Male. http://www.butterflycircle.com/check...-%20horace.jpg
B6.Nacaduba pendleburyi
FW postdiscal band not dislocated.
HW with the submarginals & postdiscals in space 4 & 5 well separated.
Upperside with the FW black border a thread & expanded at the apex in the male (Diagnostic.) Added: FW marginal & submarginal spots narrow, submarginal spots 4 & 5 pointed.
B7. Nacaduba solta. FW with a very straight postdiscal band as in N. calauria
This species is not found in Singapore.
TL Seow: Cheers..
PS. It is very likely that what was thought to be one variable N. sanaya species in Singapore actually comprise two equally common species, ie. N. sanaya & subperusia..
Previous use (for comparison) of N. perusia images with only features of dark markings & unbroken postdiscal band ( from neighbourig countries ) is probably untenable.
PS 2. The two males from Thailand match the image of N. pendleburyi male in C&P4.
HW with wide spacing of postdiscals & submarginals in space 3, 4, & 5.
FW marginal & submarginal bands narrow, submarginal spots 4 & 5 pointed. https://pamsbutterflies.com/butterfl...-sanaya-elioti