( iii ) 



II. HoMffiOCHUOMATISM BETWEEN pAIRED SpEOIES OF DIFFERENT 



GENER-iV. 



Tithorea humholdti and Heliconius cassandra. Colombia. 

 Tithorea candollei and Heliconius sp. Antioquia. 



(with these associated Epicalia chromis^'^). 



Tithorea bonplandi and Heliconius hecuha. Colombia. 



Tithorea pavonii and Heliconius atthis Ecuador. 



(with these associated Pier is locusta, ? ) . 



III. Geographical modifications of Homceochromatic Species 



OF the same Genus. 

 Helicotiius thelxiope and H. vesta. 



a. Parallel varieties of both species in Cayenne, inoscu- 



lating with H, melpomene at one end of the series, 

 and extending to typical H. thelxiope and H. vesta at 

 ' the other end ; the varieties occurring without refe- 

 rence to geographical distribution. 



b. Fixed geographical paired races of both species from 



British Guiana, Lower Amazons (Para), Upper 

 Amazons (Pebas), Ecuador and Bolivia, and accom- 

 pained in the first three localities by homa;ochro- 

 matic races of H. aa;de. 



c. Intermediate forms connecting H. vesta with H. phyllis 



in Bolivia. 



IV. Extensive Homceochromatic (Mullerian) Groups.* 



1. North Central- American Type. — Guatemala to Nicaragua. 



Lycorea atergatis. Heliconius telchinia. 



Melino'.a imitata. Eueides zorcaon. 



Tithorea sp. Eresia phihjra. 



Mechcmitis dori/ssus. Protogonius cecrops, 



Ceratinia dioncca, Dismorphia praxinoe. 



C.fenesteUa. Mylothris malenka. 



* The genera in the left-hand columns of the list, except Lycorea, 

 a true Danaid, belong entirely to the Heliconioid Danainte (Neotro- 

 piiiaj). Of those in the right-hand columns, Heliconius^ and Eueides 

 Vjelong to the Heliconiinas ; Ere.sia, Ana-a and Frotogoniua to the 

 Nymphalinse ; Archonias, Mi/lotliris a.nd Dismorphia to the Pieiiiife ; 

 and Ithuine.is to the Erycinidte. 



