AER'OMACHUS. 65 



" 9 Larger than the male, with the yellow discal basal throughout 

 in the posterior wings, but only in the interno-median area in the 

 anterior ones, and the yellow portions of the cilia, especially towards 

 the inner and anal angles, darker, inclining to orange. 



Expanse : ri8 inches." (Wood-Mason and de Niceville, I.e.) 



Mr, de Niceville notes that the male has a bare patch at the end 

 of the ceil on the upperside of the hindwing on which is placed an oval 

 patch of dosely packed scales. 



Also recorded from Orissa (Taylor)] Andamans (Wood-Mason and 

 deNicevilk)', Nilgiris (Hampson); Sikkim (de Niceville.) 



I obtained two specimens of this at Beeling, Upper Tenasserim, and 

 several specimens since in Upper Burmah. What is universally accepted 

 as one form of the species has been described by Mr. Moore, from 

 Magaree, Pegu, under the name of C. tympanifera. According to Mr. 

 Moore it " is a comparatively larger insect that C. purreea ; the bands 

 on the forewing are broader with more irregular borders, the bands of the 

 hindwing are also broader." 



In collections Indian Museum and de Niceville. 



GENUS XXV, AEROMACHUS. 



Aevomachus, de Niceville, Journal Bomb. Nat. Hist., Soc., vol. v, p, 

 214 (1890). 



Thanaos, (auctoruni nee Boisduval). 



" 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 subcostal nervule nearer to base 

 of first than to base of third, fourth subcostal arising very near to 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 consider- 

 ably below the apex of the wing ; upper disco-cellular nervuk short, stout 

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

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

 middle, inwardly oblique ; the median nervules with their bases equi-distant, 

 given off very near to the end of the cell, the third median originating at 

 the point where the lower disco-cellular nervule meets the median nervure ; 

 the median nervure strongly bent upwards from the base of the second median 

 nervule ; submedian nervure straight. MALE (in the type species only) with 

 a broad oblique stripe of modified scales on the upperside extending from 

 the middle of the submedian nervure to the base of the second median 

 nervule. HINDWING, much rounded throughout ; costa short; costal nervure 

 almost straight, first subcostal nervule bent upwards at base, thence straight 

 to apex of wing; subcostal nervure strongly bent upwards between the bases 



9 



