A new race of Attacus Atlas, 



by 



J. Henry Watson. 



(PL io). 



Attacus Atlas Simalurana (Nov. Subsp.). 



Near to atlas gladiator (FRÜHST.) and atlas erebus (FRÜHST.). 

 Vinous chestnut; fore-wing as strongly arched though more 

 pointed than erebus (FRÜHST. 1904) : proximal third of forewing 

 costa edged with a black gre) - dusted band ending at the 

 large apical black spot. The basal fascia red, strong but 

 diffuse, the interior area vinous red and ver)- faintly dusted 

 with black and gre)- scales. The postmedian fascia costal 

 fourth outwardly exculped with white and then red; behind 

 the discal vitreous spot it approaches very near the antemedian 

 line and almost meets it ; the vitreous spot long and narrow, 

 heavily bordered with black distaci ; a small secondar)- one 

 is on the postmedian line ; margin of wing below the curve 

 is dark olivaceous and the black line heavier than gladiator 

 (FRÜHST.) from Singapore or the form from the Andamans. 

 Hindwing; postmedian line more deeply exculped between 

 all the veins than any other race of atlas I have seen. The 

 vitreous area narrow, pointed outwards, the apex just resting 

 on postmedian line, the lower angle of the base produced 

 inwardly towards the base of wing. Hindwing margin as 

 the forewing, dark olivaceous ; darker than gladiator (FRÜHST.), 

 erebus (Frühst.) or the Andamans form which I have described 

 more than two years ago (though still in the press) as A. atlas 

 Mc. Mulleni. 



Type 1 rf in coll. Mus. Leiden. 



Edw. Jacobson leg. on the island of Simalur (N.W. Sumatra). 



A very interesting race of Attacus atlas which may be at 

 once distinguished bv its vinous chestnut colour. 



