214 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, 1890. 



appear to be formed by a portion of the ground-colour being left free 

 from the dull ochreous scales. Antennae above entirely fuscous, 

 beneath with an increasing yellowish streak towards the apex, not 

 extending to the extreme tip. Cilia of the forewing concolorous, of 

 the hindwing cinereous. 



Apparently nearest to I. subtestaceus, Moore,* of which there 

 is one of the original specimens from Upper Tenasserim taken 

 by Mr. Ossian Limborg in 1876-77 in the collection of the Indian 

 Museum, Calcutta. Differs therefrom in having two spots instead of 

 one in the discoidal cell of the forewing, two instead of three sub- 

 apical dots, three instead of two discal spots, which latter also dif- 

 fer widely in size, shape, and position. The coloration of the under- 

 side is also quite different. 



The type specimen of /. tapis is from Johore in the Malay Peninsula, 

 and was kindly forwarded to me by Mr. W. Davison. In the Indian 

 Museum, Calcutta, are two small specimens taken by Dr. J. Anderson 

 in the Mergui Archipelago on 11th December, 1881, and 11th April, 

 1882, respectively, which are undoubtedly the same species, though 

 too worn to be identified by Mr. Moore when working out the collec- 

 tion of which these specimens formed a part. On one of them Mr. 

 Moore placed a ticket on which is written "not moolata,'* which is, 

 however, a Parnara, and not an Isotcinon. 



Genus AKROMACHUS, nov. 



Both wings very small. Forewing, triangular, costa quite straight, 

 apex acute, outer margin gently convex, inner angle rounded, inner 

 margin straight, longer than the outer margin ; costal nervure ending 

 about opposite the apex of the discoidal cell, well separated from the 

 costa, bent upwards to the costa towards its end ; base of second sub- 

 costal nervule nearer to base of first than to base of third, fourth sub- 

 costal arising very near to the base of third, reaching the apex of 

 the wing ; terminal portion of subcostal nervure (often called a fifth 

 subcostal nervule) ending on the outer margin considerably below 

 the apex of the wing ; upper disco-cellular nervule short, stout, out- 

 wardly oblique, straight ; middle disco- cellular sinuous ; lower disco- 

 cellular shorter than the middle, straight, in the same straight line 



* Proc. Zool. Soc. Lond., 1878, p. 844. 



