542 MR. H. W. BATES ON THE LEPIDOPTERA 



with Ithomia JEUa in another locality. A species of Bombycicle Moth {Dio])tis JEliana, 

 PL LV. fig. 10) is also seen mingled with the crowd in the forests of Tonte Boa. None of 

 these are found in any other part of the Amazon region, nor indeed in any other part of 

 America, to my knowledge, than the places inhabited by their cotinterparts. 



Found at Ega, in company with Stalachtis Buvalii and Ifhomia Theonod, var. Lysinoe. I think there can be no 

 doubt it is of the same stock as Ithomeis aurantiaca, and has become modified in colours by natural selection, like 

 Leptalis Li/siHoe, to adapt it to the prolific and flourishing Stalachtis Buvalii. 



3. Ithomeis Heliconina, n. sp. 



<3 . Expanse 1" 2'". Fore loing : above, black ; a large triangular spot on the basal part of the disk, traversed by 

 the median nervure and its first branch, a short crossbelt beyond the cell, traversed by the costal, upper and lower 

 radials, and 3rd median branch, white ; a narrow submarginal curved belt, beginning on the costa and ending near the 

 hind margin, reddish. Beneath, the same. 



Hind wing : above, black, with the disk (behind the cell), including the central part of the abdominal margin, 

 greyish white, semltransparent ; the nervures dusky : the broad black hind border has a narrow reddish-orange stripe 

 in its middle. Beneath, the same, except that there is a white spot at the base. 



Body and antennae black ; forehead silvery white ; abdomen beneath orange. 



Found at St. Paulo, flying in company with Ithomia Ilerdina, which it resembles when on the wing. 



4. Ithomeis mimica, n. sp. 



(3 ? . Expanse 1" 3"'-l" 9'". Fore wing : above, dull black, with a reddish tinge on the margins near the base ; 

 a triangular spot traversed by the median nervure in the basal part of the disk, and an obscure spot between the 2nd 

 and 3rd median branches, dull greyish white ; a broad arched tawny-orange belt parallel to but distant from the outer 

 margin, beginning on the costa, and not reaching the hind angle. Beneath, the same, except that the tawny-orange 

 belt is yellower, and that there is a stripe of the same colour on the costal and hind margins, near the base. 



Hind wing : above, dull black ; the disk crossed behind the cell by an obscure, narrow, greyish stripe, traversed by 

 the dusky nervures ; a broad regular submarginal stripe along the hind margin and the abdominal edge orange-tawny. 

 Beneath, the same, except that there is a whitish streak at the base of the costa. 



Body and antennae black ; forehead silvery white ; abdomen beneath orange. 



This species is found at St. Paulo and at Ega. It has a great resemblance in colours (though much smaller in size) 

 to Stalachtis Euterpe, which inhabits in great numbers both localities. 



5. Ithomeis Satellites, n. sp. 



,3 . Expanse 1" 8'". Fore wing : above, black ; a very large triangular spot, occupying the basal part of the disk, 

 extending nearly to the end of the cell and to the hind angle, and a macular crossbelt consisting of six spots, half- 

 way between the cell and outer margin, greyish white, slightly transparent ; a submarginal belt, beginning on the costa 

 and extending nearly to the hind margin, reddish orange. Beneath, the same. 



Hind wing : above, with tlie whole disk grey, semltransparent ; the costal edge black ; a broad submarginal band, 

 beginning on the costa and running parallel with the margin to the abdominal edge, reddish orange, bordered on each 

 side with black. Beneath, the same, except that the red submarginal belt runs also along the costal margin to the 

 base of the wing, which has also on its black costal edge a whitish stripe. 



Body and antennae black ; forehead silvery white ; abdomen beneath orange. 



This species has the light-coloured portions of the wings much greater in extent, and much clearer in hue, than any 

 of its kindred. It is found in the forests of the Cuparl, a branch of the Tapajos, in company with Ithomia Flora. It 

 is in accordance with the rest of the facts of adaptive resemblances here recorded, that this Ithomeis, the Leptalis of 

 the locality {L. Theonoe), and the Ithomia which they both mimic (/. Flora), are all much more transparent and 

 clearer in colour than their allied forms of the Upper Amazons. 



I believe that all the five species of Ithomeis here described belong to one stock. It is remarkable that the colours 

 of the antenna; and body are identical in all five. This seems to show that the modifications have played only 

 upon the colours of the wings, and this strictly in accordance with the Ithomice or Stalachtes which abound in the 

 locality they respectively inhabit. They are all excessively rare. I found but one specimen each of four of the 

 species, during eleven years' research. 



