210 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



belong to the Sylvaiius group ; among them may be mentioned, 

 in addition to those ah-eady spoken of, HeUconius numata, which 

 resembles MeUnaea mneme and Tithorea havmonia ; H. zuleiea, which 

 resembles a Mechanitis and is a good copy of Melinaea hezia; and 

 H. nietalilis, which is said to mimic Melinaea lilis ; there are also 

 striking resemblances between 



H aurora and :^Ielinaea lucifer ; H. messene and Melinaea mesenina ; 



H eucrate and Mechanitis lysimnia ; H. hecalesia and Tithorea hecalesma; 

 H hecuba and Tithorea bouplandii ; H. ethra and Mechanitis nesaea ; 



H formosus and Tithorea penthias ; H. pardalinus and Melinaea pardalis ; 



H. telchina and Melinaea imitata ; H. ismenius and Melinaea messatis. 



Most remarkable of all perhaps is the close resemblance between 

 HeUconius aristiona, Mechanitis niethone, and Ithomia fallax of 

 Staudinger. In fact, Staudinger states in his " Exotische Schmet- 

 terlinge " that he hesitated for some time to describe Ithomia fallax 

 on ac«)nnt of its close resemblance to Hewitson's Mechanitis methone. 

 Good lists of the Heliconidae which are said to mimic one another 

 are given by Wallace ('89, p. 250, 251), and by Haase ('93% p. 



146, 147). 



(3^ The Three Color-Types in the Genus Euekles. In the 

 genus Eueides we meet with three color-types represented by 

 E. aliphera, E. thales, and E. cleobaea. These insects are dis- 

 tinctly smaller than the species of the genus Heliconius, and the 

 yellow spots upon theii- primaries are more ocherous in color than 

 in Heliconius. E. aliphera (Plate 6, Fig. 77) represents the most 

 highly specialized color-type. Eueides mereaui (Fig. 76), however, 

 is a good connecting link between the color-patterns of E. aliphera 

 andE. thales (Fig.''75), and E. thales is almost identical in color- 

 pattern with Heliconius vesta (Fig. 74). 



The other type of Eueides is represented by E. cleobaea, E. 

 dianasa, E. Isabella, etc. (Plate 6, Fig. 78, and Plate 8, Fig. 93). 

 These resemble the Sylvanus group of Heliconius or various Melmaeas 

 and Mechanitis. 



(4) Detailed Discussion of Plates 5-8. Plate 5 is intended 

 to illustrate the types of coloration found in the Antiochus and 

 Erato groups of the genus Heliconius. In H. sara (Fig. 61) the 

 wings are suffused with a dark blue iridescence, and some narrow 

 yellow bands of color are found upon the primaries. In H. antiochus 

 (Fio- 62) we find similar bands of color upon the primaries, but 

 they are changed to white. H. antiochus may have descended 



