OF THE AMAZON VALLEY. 547 



that it wants, beneath, the greyish-wliite marginal stripe at the apex ; the upper disco- 

 cellular is rather longer. 



Siiid wing with the costal edge much more dilated before the apex than in I. Orolina, 

 and the apex itself in consequence is more broadly and transversely truncated ; the two 

 radials are much closer together, the upper partly atrophied, and the lower not visible on 

 the disk ; the third median branch is directed more towards the apex of the wing ; the 

 colours of the hind wing are the same as in I. Orolina, except that the dusky border is 

 deeper in colour, more distinctly limited, and has an orange stripe running through the 

 middle, which is most distinct towards the apex. Beneath, it wants the short grey-white 

 macular marginal stripe at the apex. 



Body and antennae black ; head and thorax with a few faint white markings. The 

 elongate cup-like depression between the costal and subcostal nervures of the hind wing 

 in the 'S , connected with the pencil of hairs, is much larger in this form than in I. Orolina. 



This is the most abundant form of the species, and should be properly taken as the type, 

 I. Orolina being subordinated with the other forms as its varieties. I follow the usual 

 practice in taking the first-described form as the type. 



Var. 4. I. Aureliana. 



In shape and markings this form comes between /. Sarepta (Hewits. Exot. Butt. Itho- 

 mia, fig. 3.) and I. Chri/sodonia. <S . Expanse 2" 2"''. Fore wing much elongated, upper 

 disco-cellular wanting : above, the subapical orange belt, as in /. Sarepta, is broadly 

 margined along its entire inner edge with black ; but it is much narrower, being broadest 

 near the costa, narrowing gradually to the 3rd median branch, thence very narrow to the 

 hind angle ; it thus leaves between the upper radial and 1st median branch a series of four 

 successively larger whitish transparent spots : the dusky belt across the apex of the cell 

 is large ; the transparent parts are whitish, and all the nervures are broadly bordered 

 with blackish : the black apical margin has a row of four obscure whitish spots. Beneath, 

 the same, except that the nervures around the end of the cell are orange-colouxed, and 

 the marginal spots near the apex are large and of a clear grey white. 



Sind toing oblong, costal border broad, apex rounded ; outer margin with a broad 

 dusky border, in the middle of which runs a broad orange stripe ; the hyaline disk is 

 whitish, the nervures dusky. Beneath, the oblong pouch near the costa is much larger 

 than in I. Chrysodonia ; colours as above, except that there is near the apex a marginal 

 row of four elongate greyish- white spots. 



Body and antennse black ; head and thorax with a few faint white marks. The hind- 

 wing lower radial ( c? ) is not visible on the disk, and the upper radial is partially aborted. 



Taken, in company with the four preceding, at St. Paulo. 



19. Ithomia Sarepta, Hewitson. 



Ithomia Sarepta, Hewits. Exot. Butt. Ithomia, fig. 3. 



Found at Barra, on the Rio Negro, by myself ; and at Guia, several hundi'ed mUes 

 further up the same river, by Mr. "Wallace. I did not find it at St. Paulo. 



I treat this as an independent form, because it appears to have separated itself com- 



