OAi 1 K US 11., HI. 
unknown, and below the northern border of which it does not pass And 
1 egala is confined to the district south of this belt, though probably'it may 
enter; here and there. The time may have been when the hilt was occupied 
by both these forms and intergrades, just as now Alope and Nephele occupy 
ic northern belt. If Alope flourished in its larval state on meadow grasses 
winch are not found ,n the Cotton States, rather than coarse saw grass or sea- 
° tn:lSS ’ the " lts ten<le » c y would be toward the country which produced the 
ormei, and there would be a movement toward the north and northwest 
borders ofThe w W ?" M a withdrawing of the parent form from the 
benders of the original territory, because there the food plant was not in perfec¬ 
tion, and so a belt would come to intervene between the parent and the variety 
a mtergiades which had arisen would follow one form or the other, and tend 
to revert to the parent or to become merged in the variety. Favorable condi¬ 
tions might render one or more of them permanent, as wi.h Alone-Texuna 
winch now seems to possess a territory of its own to the southwest. Certainly 
the parent form would be more or less modified by the absorption of the intei-- 
g;a. es, if not permanently, yet so that now and then sports would be thrown 
p ' ° TliV/ GC 10 1 ) ° ,1 l<>P t IIe ” Ce the occasion <il examples of two-eyed 
Peyala That, on the other hand, the intergrades nearest the strong variety 
' W ‘ e '! C ° merge 111 Ifc also > when cross-breeding had ceased by the dfsappear- 
ance of the parent form, we may infer from the fact that when Alope is sup- 
. P .T. ,p “” ” “ “• »«'"*»*"*, 
Alope enters its dimorphic belt from the south and emerges Nephele on the 
noi iern side while within are all manner of intergrades. If in this belt the con- 
(h ions were to become unsuited to the support of any Satyrus, and the forms 
which now occupy it were to become extinct, either suddenly or gradually we 
should have to the south Alope and to the north Nephele, two good'species.' with 
no nng, in the absence of mtergrades, to show how one of these forms could 
have been related to the other. The conditions would be similar to those be- 
tween Pegola and Alope now. 
Ppala possesses in perfection many points which are found in one or other of 
all the members of the sub-group. It is considerably the largest, though occa¬ 
sionally an Alope-Texana fully equals it. Its peculiar brown color on upper side 
anil gray-brown on lower side passes into Alope, which gradually changes into 
ic caiker shade of Nephele. The rufous becomes yellow in Alope, budbreaks 
out in that species m certain localities, as seen in var. Marilima. After the band 
ins become suppressed in Nephele, every now and then it reappears in Greater or 
less degree, even in Olympus and Boopis. A single ocellus is now a p^omfnent 
