548 MR. H. W. BATES ON THE HELICONIDE LEPIDOPTERA 



pletely from the parental stock, I. Orolina, and inhabits a distinct area of country. 

 ItJiomia Cidonia (Hewitson, Exot. Butt. Ithomia, fig. 122), of New Granada, is another 

 local race of the same stock. I. Sarejjta comes nearest to I. Aurelicma, and I. Cidonia 

 to I. Chrysodonia. The five varieties found mingled together at St. Paulo cannot be thus 

 separated, although they show, as we have seen, differences of structure as well as of 

 colour and markings. They form a graduated series, and have not reached the stage of 

 complete segregation. The differences in the veining of the wings are evidently the 

 correlated result of the altered shape and increased or diminished size of the wings. I 

 consider this Orolina group of Itliomice to be nearly equivalent to the Illinissa group ; 

 the difference between the present condition of the two is that in Ithomia Orolina and 

 its allies the segregation of the forms is only partially complete, whilst in I. Illinissa and 

 its kindred it is almost perfectly so. 



A variety of Leptalis Lijsinoe {L. Erythroe, PI. LVI. figs. 1, 2, 3), a Napeogenes {N. 

 Corena), and a Bombycide Moth {Bioptis, n. sp.), all assimilated in colours to L. Oro- 

 lina and its varieties, occur in company with them at St. Paulo. 



20. Ithomia Obiana, Hewitson. 



Ithomia Oriana, Hewits. Exot. Butt. Ithomia, fig. 134. 



Abundant at St. Paulo, in the moister parts of the forests. 



21. Ithomia Virginia, Hewitson. (PI. LVI. fig. 6 a.) 

 Ithomia Vii'ginia, Hewits. Exot. Butt. Ithomia, fig. 18. 



Banks of the Upper Amazons, from the mouth of the Bio Negro to St. Paulo. It is 

 probably a local variety of I. Cyino. The upper radial is partly aborted in the S . 



22. Ithomia Ctmo, Hiibner. 



Ithomia Cymo, Hiibn. Saraml. Exot. Schm. 

 Galita, Hewits. Exot. Butt. Ithomia, fig. 5. 



Very abundant at Para, in company with I. Flora. The upper radial is totally wanting, 

 and the lower disco-cellular partly aborted in the d" . 



23. Ithomia Nephele, n. sp. 



6 S . Expanse 2" 5'". Hyaline, slightly fuKginous. Fore toing with a narrow black 

 border, which is broadest along the hind margin ; there is a short, broadish, oblique black 

 belt across the end of the cell, and beyond this an oblique chalky-white belt, beginning 

 on the costa, where it forms an opake white stigma, and nearly reaching the middle of 

 the 3rd m.edian branch ; the nervures which it traverses are also white ; the 2nd and 3rd 

 median branches, as well as the rest of the nervures, are black ; there is also a series of 

 obscure whitish spots between the nervures, near the outer border. Beneath, the black 

 borders and belt are reddish orange. 



Kind wing with a narrow, clearly defined black border, which beneath is reddish 

 orange. 



Body and antennae black ; head and thorax marked with white. 



