SATYRUS II., III. 
characteristic of Pegala, but there has come to be a certain modification, so that 
in some cases, in the female, there are two complete ocelli, but in many more ot 
both sexes there are dots and small spots in place of a second ocellus. I w Alope 
and the rest there are two ocelli, not always complete or equal, and occasionally 
one is suppressed. When this happens it is always the lower one, which is want¬ 
ing in Pegala. There is a tendency to variation in the number of these ocelli, a 
second one sometimes appearing in Pegala , but a third one sometimes m Alope, 
and in the last named species and the rest of its sub-group, there are not unfre- 
quently one or two small spots on the fore wings, as of incipient, ocelli.. The 
sin ole ocellus invariably seen at anal angle in Pegala is. often wanting or. incom¬ 
plete in the other forms ; and the six ocelli of under hind wing, almost invaria¬ 
bly present (but sometimes six on one wing, five on the other —never less, so 
far as observed), vary from six to nil in all the others. 
It is to be noticed that the belt within which these Satynds are dimorphic is 
nearly coterminous on the north and south with the dimorphic belt of Limenitis 
Arthemis and its co-forin Proserpina. Artliemis alone occupies the northern 
part of the continent, but in a section of territory extending from Maine to 
Wisconsin, and which covers much of New York and New England, it is dimor¬ 
phic with Proserpina , as shown in this Volume. Proserpina alone emerges 
from this belt on the south, and grades imperceptibly into Ursula. And the 
dimorphism of Papilio Turnus originates in this same belt. So far as known, 
however, there is no western limit to the dimorphism in these species, anc 
therein they differ from Alope. It is difficult to conjecture what influence could 
have brought about the suppression of Alope in the whole west, and have re¬ 
produced the Canada form, and allowed it to flourish so luxuriantly. One 
cannot conceive what there is of climate or else in common between Canada 
and the prairies to effect this result. _ 
After the first of my papers on these Satyrids appeared in the Canadian En¬ 
tomologist, I received several letters calling my attention to published lists o 
butterflies of different western States, in which Alope is set down as present 
and usually both Alope and Nepliele. I wrote to the authors of these lists, and 
in many cases examples of the butterflies called Alope were sent me. In every 
instance, what had passed by that name was either what I should call Nepliele , or 
what would be an intergrade if taken in New York. In the west these are not 
intergrades, because there is no Alope in that region, and so no comrmng mg o 
the two forms. I limit the nam e Alope to the typical form. These apparent 
intergrades are never found where Alope flies alone, before it approaches the 
dimorphic belt, but they appear occasionally to the westward throughout the 
Nepliele territory, and should be regarded as examples of reversion. 
