Nacaduba hermus
Nacaduba hermus, the pale four-line blue, is a species of lycaenid butterfly found in Indomalayan realm. The species was first described by Baron Cajetan von Felder in 1860.
Description
Male
The upperside of the male is dark purplish brown. The forewings and hindwings have black anteciliary lines. The hindwing has two black spots that are nearly equal, one in interspace 1 and the other in interspace 2. The spots have a silvery white edge on the outerside. The tail is black tipped with white.The underside is hoary brown. On the underside of the forewing there are transverse bands of the ground colour defined by very fine white lines as follows:
- a band across middle of cell extended from the subcostal vein to vein 1
- a short band defining and enclosing the discocellulars and a bisinuate discal band extended from veins 1 to 7; succeeding these are an inner and an outer subterminal series of transversely elongate spots somewhat darker than the ground colour and a slender black anteciliary line
- each row of the subterminal series of spots is obscurely bordered inwardly and outwardly with whitish.
- a subbasal band across cell, another at apex of cell extended from vein 8 to vein 1, and abruptly turned upward and terminating on the dorsal margin;
- a discal band very irregular and sinuate from vein 8 to vein l, then bent upwards to dorsum; beyond these an inner and an outer subterminal series of white lunules, the inner series obscure, of the outer series the lunules in interspaces 1, 2, and 3 very prominent.
Antennae black, shafts minutely ringed with white; head, thorax, and abdomen dark brown; beneath: the palpi fringed with black hairs, thorax fuscous, abdomen dull white.