138 Dr. H. Eltringham on Specific and 



that all but two species in Section I mimic species of 

 other genera. Intrageneric mimicry occurs between two or 

 three species in Section I and between a much larger 

 number of species in Section II. One species in Section 

 I produces forms which mimic six or seven species in 

 Section II, a phenomenon recalling that of the mimicry of 

 several species of Planema by one species of Pseudacraea. 

 Whilst I think that fuller knowledge of the genus is 

 likely to confirm the majority of the conclusions here 

 attained, it must not be forgotten that cases occur in 

 which Lepidoptera quite undistinguishable on the armature 

 structure are, nevertheless, known from other characters 

 to be distinct species, and it seems probable that instances 

 of this condition will also be found in the present genus. 



The mimetic relationships of Heliconms. 



The species and forms included under the group Silvani- 

 formes nearly all resemble species of other genera and 

 subfamilies. They are members of great mimetic associa- 

 tions which include species of widely separate affinities. 

 It is not within the scope of the present reaper to study in 

 detail all these associations. They are fairly well known, 

 and have been referred to by many authors. Beyond the 

 fact that hecalesia octavia resembles anderida zuleika, the 

 forms of Silvaniformes, excluding the intermediate tuma- 

 tmnari and elevatus, do not, as a rule, resemble those of 

 members of Section II of the genus. The accompanying 

 table (Table I) gives some of the more striking associations 

 to which forms of the Silvaniformes belong. 



As already stated, Mr. W. J. Kaye has pointed out * 

 that, having once separated the forms of the genus 

 into their two sections, we find that many of those of 

 Section I resemble forms of Section II. In order more 

 fully to illustrate this remarkable parallelism, I have pre- 

 pared PI. XII. The figures, as in PI. XI, are much 

 reduced, but will suffice to illustrate the patterns. The 

 examples shown in the second and fourth columns are all 

 forms belonging to melpomene — that is, accepting the con- 

 clusions already arrived at, are all the same species. The 

 specimens figured in the first and third columns are all 

 members of Section II, and belong to several species. 



Fig. 1 is egeria egerides, fig. 2 melpomene funebris cybele. 

 * Loc. cit. 



