OF THE AMAZON" VALLEY. 543 



8. Itiiomia Ii,Era)iNA, ll(nvits()n. (I'l. LVI. lig-. 1 «.) 



Ithomia Ihrdina, Ilewits. Exot. IJutt. Itltoinia, f. 129, 1 15. 



This is closely allied to 1. Ill/uitut". It entirrlv takes the plaee of that speeies at St. 

 Paulo, dilTering- from it only in the white disk of tlu; hind wing and orange submarginal 

 band of the fore wing. It is clearly only a local modilieation of the same, wlujse segre- 

 gation from the original stock is complete. A variety oi Lcpddis Lijainu'e {L. Leu.conov, 

 n. L\'I. fig. 1) exists at St. Paulo in company with it, and presents precisely the same 

 modifications of colour ; also the Erycinide TtliornciH Tlclicoitiim, and a species of J?ond)y- 

 cide Moth (J^^/Vyy^Z/V, 1*1. L\'. fig. 11). The tlirec niiiniekiiig s])ecies were very rare, whilst 

 /. IlerdiiKi was extremely abundant. 1. lIci'diiKi varies a little in the white ner\ures of 

 the disk of the wings being partly black, showing the process of transition to the peculiar 

 white hue which disi iuguishes it from the allied species. 



9. Itiio.mia Onkga, llewitson. (PI. LV. fig. 2 a.) 

 Ithoiiiiu UiH'iia, Ilewits. Exot. Hutt. Ithonwu t- 1- 



This IiandsouK! s])ecies is found in abiuulaiu'(> tln'om^Hiout tlie r])per Amazon rei;-ioii, 

 where it seems to take the place of Uhom'ia Flore, which is ])eculiar to the rei:ion nearer 

 the Atlantic. I believe it to be a local modification of /. Flora. A Leplalh of similar 

 colours {^L. yichnioe, PI. \N . fig. 2) and a l?ombycide Moth {])io]ttin Oiicc/n) aecomjiany 

 it. Tlu> L('iit"lis is undoubtedly a variety or descendant from the stock of L. Thcoiioe, 

 which, we have seen, inhabits only those ])laccs where ftliouiid Flora occurs. Lt'jdnltx 

 Mclanoii has been found nowhere but in company \\\\\\ lUnnn'ia Oucya. 



10. Itiiomlv Flora, Cramer. (PI. LV. iig. 1 a.) 

 I'ajtitio Flora, Cramer, I'ap. Exot. t. L',)/. f. 15, C (poor figure). 

 Ithomia Flora, Ileuitsoii, Exot. I5iitt. Itltnmiu, f. G8, G9. 

 Er/ra, ibid., f. 1 (a slif^ht aberration). 



This s[)ccies al)ounds in the forests of the Amazon Delta, and as far up the river as the 

 banks of the Cui)ari (a l)rauch of the Tapajos), 120 miles above the mouth of that river. 

 Unlike the Uhomhe of the I'pper Amazons, its Avings have a \-ery large portion of their 

 surface ehvar of scales and transjjarent. Lcplalls T/ieonoe {VI. LN . tig. 1), Napcoijcnca 

 lUrra, and tlie l?ond)ycide ^[oth Diopti.'i C'l/ma, have a great resemblance to it, and are 

 found only in the regions which it inhabits. Diopliti Ci/)iia, however, is a)i exception ; 

 it has ac(|uire(l a wider ranue, being found at Ega, wliere no cl(>ar-wing(>d Ithnmuc are 

 met with. The Ilhomui'. increase in transparency in receding from the ('(piator. 'I'hey 

 are niunerous in \'en(v,uela. South Brazil, and Mexico. The tendency to transparency 

 reaches its acme in llhomia {lliinicuith) diaphana of Jamaica. Nearly all the species oi' 

 the Ui)i)er Amazon region Jiave o])ake wings. 



11. Tth()mi.\ Doto, IFiibner. 



Ilhoinia Doto, Iliibner. Saniml. Exot. Schmett. 

 Sisera, Hewits. Exot. Mutt. Illiomia, f. C. 



Abundant on the liauks of the Tocantins. at Paiao. Fouiul also at Para. 



VOL. XXIIl. -1. I) 



