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107. Biirsada atribasalis sp. uov. 



Foreicings : black, with two Jeep 3-ellow blotches; oue obloug, near base, 

 resting on the median vein ; the other transverse and obliipie, beyond middle, 

 narrowed above and bnlged in the middle, from below three-fifths of eosta towards 

 anal angle ; fringe concolorons. 



Hindtcings : deep yellow, with a broad black marginal fascia from before apex 

 to anal angle, its inner edge with slight yellow teeth along the veins; ; basal third 

 black, with sinuons onter edge ; costa narrowly black between basal and marginal 

 Ijlack areas. 



Underside like npper. Head, thorax, and abdomen blackish; abdomen with 

 yellow lateral spots ; palpi and some scales externally ronnd the eyes yellow. 



Expanse of wings : 35 mm. 



One 6 from Pulo Besi, north of Obi, September IS'JT (Doherty). 



Distinguished at once by the black basal area of hindwings. 



The hindwings are slightly indented opposite cell and near anal angle, and 

 bulged outwards between. 



10b. Bui'sada basistriga invadens subsji. uov. 



Uirt'ering from the type form ui bn-iintrifia ^Vlk. only in the fact that the two 

 obliijue yellow blotches of the fore wings are produced upwards so as nearly to touch 

 the costa ; in the hindwings of the S S the costal dark border is much narrower 

 than in the ? ? , a difierence which is not noticeable in the type form. 



Three ? ?, three S S, from St. Aignau, October and November 1897 (A. S. 

 Meek). 



The 6 S all smaller than the ¥ ? . 



But along with the examples of this form, and taken flying with them, are 

 eight J (J in which the preponderance of the orange over the black coloration is so 

 striking a feature as to merit a distinctive aberrational name. Though not so much 

 smaller than the ? ¥ as are the c? cf of invadens, they agree with them in the much 

 narrower marginal border of both wings. The two dark fasciae at one-third and 

 two-thirds tend to become split up each into two narrow bands, of which the inner 

 one becomes interrupted or obsolete ; in one example the outer arm likewise is 

 wholly interrupted in the middle, while in a second both fasciae have vanished 

 entirely, leaving only the inner and hindmargius narrowly black ; and iu this case the 

 orange ground-colour passes into yellow. For the less-interrupted aberrations 1 

 propose the name interruptata, and for the last-mentioned form that of obsoleta. 

 As tending to prove that these are merely aberrations of the snbspecific form 

 incadens, it may be mentioned that iu one of the examples the right wing shows 

 the two fasciae entire, while the outer fascia of the left wing contains indications of 

 its division into the two narrower bauds. 



lu9. Bursada interspilata sp. uov. 



Fore-wings: brown-black ; a curved yellowish patch, dusted with fuscous scales, 

 at base of cell, extending below it as far as the submediau fold ; at two-thirds a pale 

 cicam-coloured fascia from just below costa to above anal angle, its outer edge 

 sinuous, with a small tail from inside edge towards anal angle ; in the middle of the 

 dark fascia separating this fa.'Doia from tlie yellow patch is a yelhnvish spot on the 



