OF THE AMAZON VALLEY. 517 



tliat it wants, beneath, tlie <^rcyish-\vliit(' marginal strii)L' at llic apex ; tlic ii|)])cr disco- 

 cellular is rather longer. 



Hhid tciiKj with the costal edge niueli more dilalcd before tlie apex than iu /. Orulnia, 

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

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

 the disk ; the third median l)raneh is directed more towards the apex of the wing; the 

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

 deeper in colour, more distinctly limited, and has an orange stri])e runnin;;- througli the 

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

 macular marginal stri])e at the apex. 



Body and antenna- black; head and thorax with a few faint white markings. Tiic 

 elongate cup-like depression between the costal aiul subcostal nervures of the iiind wing 

 in the cf, connected with the pencil of hairs, is much larger in tills form than in /. Orolina. 



This is the most abuiulant form of the species, and sliould be properly tai<en as tiictyj)e. 

 I. Oroli/ia being subordinated with the other forms as its varieties. 1 follow the usual 

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



Var. i. I. Aiircl'nijin. 



In shape and mai'kiuus this form comes between f. Sorcpln (Ilewits. Exot. Ibitt. IIIkj- 

 )iiui, fig. 3.) and /. Vltrysodotiid. 6 . Exjjanse 2" 2"'. Fore ir'nuj much elongated, upper 

 disco-cellular wanting: nhoi-c, the subai)ieal orange belt, as in I. Sarrjilo. is l)roa(lly 

 margined along its cut ire inner edn'c with black; but it is nuich narrowci'. bcinu' broadest 

 near the costa, nai-rowiiig gradually to the .'5r(l median branch, tiience \r^•\ narrow to the 

 hind allele; it thus leaves between the u|)per radial and 1st median bi-anelia series of four 

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

 is large; the transparent ])arts are whitish, and all the nervures are broadly bordered 

 with blackish: the black apical inaruin has a row of four obscure w liil ish spots. lu'/ic"///, 

 the same, exct>[)t that the nervures around the eiul of the cell are oi'anuc-colonred. and 

 the margiiud sj)ots near the apex are large and of a clear grey white. 



Hind icliig oblong, costal border bi'oad, a|)ex rounded; outer mariiinwith a broad 

 dusky border, in the middle of which runs a broad orange stripe; t be hyaline disk i- 

 whitish, till' m'r\ ures dusky. Jlfiicatli, the oblong pouch near thi' cost:i is nnicii larL^er 

 than in LC/ii\i/sodoiii(( ; colours as abo\(', excej)t that there is near the apex a nuiruinal 

 row of four elinigat<> greyish-white spots. 



Body and antenna' l)lack ; head and thorax with a few i'ainl white marks. The hind- 

 wing lower radial (t') is not visibh' on the disk, aiul the upper radi;d is partially aborted. 



Taken, in ctmipany with the four preceding, at St. I'anlo. 



19. Itiiomia Sari:pt.\, Hewitson. 



Ithomid Sarcjita, Ilcwit.s. Exot. IJntt. Illiomin, fiir. ■^■ 



Eound at Barra, on the llio Xei^ro, I)y myself; and at Quia, several hundred miles 

 further up the same river, by Mr. "Wallace. 1 did not fiiul it at St. I'aulo. 



I treat this as an independent lorm, l)ecause it ap))ears to have st'iiarated itself com- 



