LYCANIDA. THADUKA. 225 
colour. Forewixg dark brown from the base to beyond the middle, the cell crossed by four 
white lines followed by two similar lines of the same colour, a submarginal band of lunular 
spots, three oblique white lines near the costal margin. Windwing with its costal margin 
sinuated, the apex projecting, a triangular brown spot on the costal margin near its base, 
two black lines at the end of the cell, and a zigzag submarginal black line.” (/ewitson, 1. c.) 
“The genus Afforasa, Moore, and the species atkinsonii, Hewitson, were both I believe 
founded on a single specimen of uncertain sex with the tails broken off. I took one male and 
two females of the species near Myitta, having tails greatly resembling those of Afzhathala, 
Moore. From that genus they differed in the less acuminate apex of the hindwing, in the egg 
(which was covered with triangles and tubercles instead of quadrangles and spines, a difference 
which seems of but small importance in this group), and in the more undulate margin of the 
hindwing. On this last account the genus might be retained. But the insect has, when sitting 
on a tree trunk, a marvellous resemblance to a patch of lichen, and the irregular outline adds 
to that effect. Mimicry of this sort is a sign of great flexibility of structure, and such genera 
must be judged by severer canons than others, so perhaps Afforasa had better be sunk in 
Mahathala.” (Doherty, 1. c.) 
Although A. atkinsoni possesses a tail similar to A/ekathala ameria, Hewitson, and the 
costa of the hindwing is also somewhat similar, yet it is, I believe, in reality nearer to 
Thaduka multicaudata, Moore, than to that species. It has the costa of the forewing as 
arched as in Z. multicaudata (considerably more so than in AZ. ameria), and the markings of 
both surfaces are very similar, therein differing very markedly from JZ. ameria. A. athinsoni 
has afew metallic green scales scattered over the wings on the underside as in 7. mx/ticaudata, 2 
feature entirely wanting in J¢. ameria, The male of A, atkinsont is a little smaller than the 
female, is very similarly marked on both surfaces, but has the purple coloration of the hindwing 
on the upperside more restricted to the disc, which is a reversal of the usual difference of 
markings in the sexes of butterflies of this group. Hewitson’s figure shows the blue coloration 
of the upperside much too pale, it is really a rather dark purple. 
Genus 129.—THADUEA, Moore. (PLate XXVII). 
Thaduka, Moore, Proc. Zool. Soc. Lond., 1878, p. 836. 
“ Allied to Mahathala, Moore. FOREWING, short, broad ; cosfa very convex at base, 
apex acutely angled ; exterior margin erect, scalloped ; posterior angle lobular ; ind margin 
same length as the costal, concave in the middle. HiINDWING, short, broad ; anterior margin 
convex, afex and exterior margin very convex, sinuous, with three prominent Zaz/s, the middle 
one longest, anal lobe large; abdominal margin very concave above anal lobe. Venation 
similar to Wathahala (Amblypodia ameria, Hewitson). Bony short, stout. Axfenne uniformly 
thickened tothe end. ali slender. Zegs short.” yes naked. (Moore, 1. c.) 
This is a very aberrant genus, and, as far as I ean ascertain, may be known from all others 
occurring in India (except some species of Zraota, Moore) by having three very distinct tails 
besides a large anal lobe to the hindwing. <A single species of Zhaduka only is known up to 
date, and it occurs in Upper Tenasserim, 
785. Thaduka multicaudata, Moore. (PLATE XXVII, Fic. 196 2), 
T., multicaudata, Moore, Proc. Zool. Soc. Lond., 1878, p. 836, pl. lii, fig. 7, female. 
HABITAT: Taoo, 3000-5000 feet, Upper Tenasserim, 
EXPANSE: 9, 1°62 to 1'90 inches. 
DESCRIPTION: “FEMALE, UppERSIDE, 40th wings purple-black, basal areas bright 
smalt-blue. Body and abdominal border greyish, thorax blue. UNDERSIDE, Joth wings dark 
vinous-brown. Forewing with short subbasal, medial, and an entire discal, purple-black ma- 
culate bands, and an outer marginal series of lunules. Aindwing with three irregular curved 
transverse purplish-black maculate bands, and indistinct marginal lunules ; a narrow metallic- 
green lunule above the tails.” (4/007, 1. c.) 
29 
