38 LEPIDOPTERA IKDICA. 



Burma. Mr. De Niceville {I.e. p. 33) gives the following : " Mr. Ossian Limborg 

 collected it at Atsown, Moulmein, to Meetan, and the Houngduran source in Upper 

 Tenasserim ; Mr. A. Allen took it at Bassein ; Capt. 0. H. E. Adamson in the neigh- 

 bourhood of Moulmein in March, June, October, and December ; Captain Bingham 

 took it in the Thoungyeen forests in May. It is common at Rangoon. Dr. J. 

 Anderson has taken it at Mergui in December." 



Geographical Disteibdtion. — Southward it extends through the Malay Peninsula, 

 occurring also in the Island of Penang and Singapore, to Sumatra and Java, and also 

 to South Borneo. 



TopojroKPHic Allies. — A closely allied species {B. jiersimilis, Moore, P.Z.S. 1879, 

 p. 136) has been collected at Chentaburree in Siam, and the typical species of the 

 genus {B. similis, Linn. Clerck Icones, pi. 16, f. 3), is a native of South China, 

 Hongkong, and Foi^mosa. 



RADENA NICOBARICA (Plate 5, fig. 2, 2a, (^ ?). 

 Danais similis, var., Nicoharica, Wood-Mason and De Niceville, Journ. Asiatic Soc. Bengal, 1881, 



p. 225, fig. ? ; id. 1882, p. 14, fig. c? ?- 

 Danais (Sadena) Nicoharica, Marshall and De Niceville, Butt, of India, &c., I. p. 3i, fig. ? (1882). 



Imago. — Male and female. Near to B. exprompta, but with the bluish markings 

 less sharply defined. Forewing with tbe basal cell streak broader, the mark beyond 

 larger and more quadrate, the discal and submai-ginal spots larger, the streaks below 

 the cell somewhat shorter and conjoined at either end, there being in the male only a 

 slender dividing black line extending partly along the middle, this line being broader 

 in the female. On th.e hindwing, both sexes have the cell area traversed by an 

 extremely slender fork-line, but which is scarcely seen in the male ; the discal 

 streaks are much more slender and shorter, leaving a conspicuous space between 

 them and the submarginal spots. 



Expanse, 3 inches. 



Habitat. — Great Nicobar. 



In the original description of this species, Mr. Wood-Mason refers to the " sub- 

 median vein of the male as having the wing membrane on each side of it raised into 

 a slight fold ; the male of this species, in fact, being provided with a distinct, though 

 little specialized, sexual mark or scent gland." 



RADENA EXPROMPTA (Plate 5, fig. 3, 3a, (? ?). 

 Danais exprompta, Butler, Entom. Monthly Mag. xi. p. 164 (1874). 

 Badena exprompia, Moore, Lep. of Ceylon, i. p. 4, pi. 2, fig. 1 (1880) ; id. Proc. Zool. Soc. Lond. 



1883, p. 224. 

 Danais (Badena) exprompta, Marshall and De Niceville, Butt, of India, &c., I. p. 33 (1882). 



Imago. — Male and female. Upperside black, abdominal margin pale broAvn. 

 Forexoing with, a pale bluish- white narrow basal streak and a large sinuous quadrate 



