ji'orti South-west Madagascar. 79 



between the end of the cell and the tliird spot in the discal 

 row of spots is densely irrorated with stramineous scales, the 

 corresponding space in erithonioides being devoid of such 

 scales. On posterior wings the dark markings are less con- 

 spicuous and the suba])ical ocellus is more elongate-ovate, 

 surrounded with a narrower black line than in erithonioides ; 

 on the disk in the spaces between the nervules and sur- 

 rounding the cell is an irregular row of triangular black 

 markings (the two uppermost hastate), bordered outwardly 

 with silvery bluish-white ill-defined spots ; the submarginal 

 spots are more conical and nearer the margin, the marginal 

 lunules are narrower and more elongate, those on each side of 

 the tail extending down it nearly to its end ; the rufous anal 

 spot is sharply triangular, with the apex downwards, instead 

 of being quadrangular, with a black bar below it ; the space 

 above the rufous spot is silvery bluish white. The an- 

 tennae of both sexes are red, as are those of the female of 

 erithonioides ; the antennai of the male of the latter and of 

 both sexes of demoleus are black. 



The, female resembles the male, but is larger. 



Expanse of wings, ^ 4|, $ 4| inches. 



Uab. Mahobo, Moroudava River, West Madagascar. 



Belenois mahella. 



Male. — Upperside. Both wings lacteous white, irrorated 

 •with grey at the base. Anterior wings with the apical third 

 broadly, and thence along the outer margin to a liule beyond 

 the lowest median nervule gradually becoming more nar- 

 rowly greyish black, somewhat irrorated with white; a round 

 greyish-black spot at the end of the cell, a greyish-black ill- 

 detined bar across the disk parallel with the outer margin 

 from and a little above the upper median nervule almost to 

 the submedian nervure, broader between the upper and middle 

 median nervules, on each of which at its outer edge it becomes 

 contiguous with t!ie marginal band ; between the second 

 median nervule and the submedian nervure the bar is much 

 narrower and partly obsolete ; costal and outer margins almost 

 to the submedian nervure black. Posterior wings without 

 markings, except a few indistinct clusters of grey scales at 

 the ends of the veins ; cilia towards the anal angle (which is 

 tinged with pale yellow-grey) . 



Underside. Anterior wings lacteous white, tinged with 

 yellow at the base and along the costa, and broadly so at the 

 apex ; a black spot at the end of the cell. Posterior wings 

 bright stramineous. 



