182 JOURNAL, BOMBA Y NA TURAL HISTORY SOCIETY, Vol. X. 



far as the discal line and from the anal angle to the third median 

 nervule, anterior to which but not quite reaching the apex of the wing 

 it is continued in a narrow submarginal fascia, white sprinkled with 

 black scales, inwardly bearing a narrow lunular black line ; the anal 

 lobe bears a large round deep black spot anteriorly with a few metallic 

 pale green scales ; a large oval deep black spot in the first median in- 

 terspace near the margin ; a fine black anteciliary thread, defined on 

 both sides with an equally fine white thread. Cilia cinereous throughout. 

 Female. Uppersidb, forewing black ; with a broad pale blue area 

 from the inner margin to the median nervure, extending slightly into 

 the first median interspace, but not nearly reaching the outer margin. 

 Hindwing with the costa and apex broadly black, . the outer margin 

 rapidly decreasingly black ; the rest of the wing pale blue. Otherwise 

 as in the male. 



This interesting little butterfly belongs to a small but distinct group 

 which hitherto has comprised three Northern Indian species, its 

 geographical range extending from Masuri in the Western Himalayas 

 to Assam, viz.' — T. megisiia, Hewitson, T. yajna, Doherty, and 

 T. istroidea, de !Niceville. From all of these T. th?'ia may be known 

 in the male in the hindwing being almost entirely cerulean blue, the 

 others having this colour confined to a more or less wide anterior 

 patch. In the same way the female may be known by the blue area 

 in the hindwing on the upperside being of much greater extent, and 

 almost reaching the outer margin, which is not the case in the three 

 above-named species. The coloration of the underside of T. tJiria 

 agrees with that of T. megistia, being orange or dull chrome-yellow. 



Described from several males in the collection of Hofrath Dr. L. 

 Martin and my own, taken in March and May, and a solitary female in 

 Dr. Martin's collection, taken in July, 1894, all from the Battak Moun- 

 tains, and from five males from the Daunat Range, Middle Tenasserim, 

 Burma, in my own collection. The type specimens are from Sumatra. 



27. RAPALA RHCECUS, de Nicevillo, PI. T, Fig. 40, $. ■ 



R. rhcecus, de Niceville, Journ. Bomb. Nat. Hist. Soc, vol. ix, p. 319, n. 35, pi. P, fig. 47, 

 male (1895). 



Habitat : N.-E. Sumatra. 

 Expanse: ?, 1*5 to 1*6 inches. 



Description : Female. Upperside, both toings fuscous, with a 

 distinctly reddish-coppery gloss in some lights which is particularly 



