232 Mr. H. W. Bates on the Papilionidae 



allied to the latter, and a number of forms of Leptalis, of such a 

 nature that they cannot be considered as specifically different, allied 

 to the former. Most of these forms mimic in that region specifically 

 the Ithom'un alluded to ; they seem to have become changed in colours 

 and markings in strict relation to them ; one or two of them, how- 

 ever, resembling in the same close manner species of Stalachtis, a 

 genus belonging to a widely different family. Although no ento- 

 mologist would consider these forms as entitled to specific rank, T 

 think it better to distinguish them, in order to bring out in a clearer 

 light the curious circumstances connected with them. 



6. L. Melanoe, nob. 



J $ . Shape, general colour, and design of the wings as in L. Tlieonoe. 

 It differs in the black lines and borders being much broader, less di- 

 stinctly limited on their edges, and in the transparent spaces being 

 suffused with dusky atoms. The orange submarginal stripe of the hind 

 wing beneath is well defined, but less sharply so than in L. Tlieonoe, and 

 less clear in colour, being sprinkled with dusky atoms. 



Found on the Upper Amazons, at St. Paulo, in company with 

 Tihomia Onega, which it closely resembles, and which I consider is 

 in that locality a local modification of ItJtomia Flora of the di- 

 stricts nearer the Atlantic seaboard. The Leptalis, as usual, was 

 excessively rare, whilst the Iihomia abounded in individuals. 



7. L. Erythroe, nob. 



S 2 • ^ er y similar to the preceding in shape and in the dusky suffusion 

 of the transparent spaces. It differs conspicuously in the three spots of 

 the apical part of the fore wing being of a vivid orange colour and opake ; 

 they are sometimes confluent, and then form a large elongate spot or belt. 

 The submarginal orange-red stripe of the hind wing beneath is well de- 

 fined and clear in colour ; the black inner edging is narrower than in L. 

 Melanoe. 



Occurs at St. Paulo in company with the Ithomice of the locality, 

 one of which, /. Chrysoclonia, nob., it mimics specifically. The 

 mimicry is more exact in some individuals than in others, producing 

 the impression that there is a striving after close imitative adapta- 

 tion. Neither the Leptalis nor the Iihomia occurred in any other 

 part of the country, except the limited locality here mentioned. 



8. L. Leuconoe, nob. 



J 2 • Shape of wings same as the preceding. In the fore wing the 

 basal stripe and the inner two of the subapical spots are transparent; the 



