(ten) 
and extending to typical H. thelwiope 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 homcochro- 
matic races of H. ade. 
c. Intermediate forms connecting H. vesta with H. phyllis 
in Bolivia. 
IV. Exrenstve Homa@ocuromatic (Mixierian) Grovups.* 
1. North Central-American Type.—Guatemala to Nicaragua. 
Lycorea atergatis. Helicontus telchinia, 
Melinaa imitata. Fueides zorcaon. 
Tithorea sp. Hresta philyra. 
Mechanitis doryssu-. Protogonius cecrops. 
Ceratinia dionwa. Dismorphia praxinoe, 
C. fenestella, Mylothris malenka. 
Intermediate between Groups 1 and 2, 
Melinea scylax. Heliconius clarescens. 
Mechanitis lycidice. 
Napeogenes tolosa. 
Ithomia heraldica, 
2. South Central-American Type.—Costa Rica to Panama. 
Thyridia melantho. Heliconius zuleika. 
Tithorea helicaon, HH, formosus. 
T. duenna, Liueides vulyiforinis. 
T. pinthias. Hresia nigripennis. 
Mechanitis isthnia, Ey. pecillina, 
Ceratinia decumana. Anaa jansoni, 2. 
C. callispila. Ithomets imitatriv. 
Napeogenes tolosa. Archonias lyceas, &. 
* The genera in the left-hand columns of the list, except Lycorea, 
a true Danaid, belong entirely to the Heliconioid Danainz (Neotro- 
pine). Of those in the right-hand columns, Heliconius and Eueides 
belong to the Heliconiine : Eresia, Anea and Protogonius to the 
Nymphaline ; Archonias, Mylothrisand Dismorphia to the Pierins ; 
and [thomeis to the Erycinide. 
