ECTIMA.—AGERONIA. 267 
coloured cross band of its primaries, which from the straightness of its margins suggested 
the name given it by Messrs. Butler and Druce!; but we fail to find any example in 
Dr. Van Patten’s collection at all answering to EL. “ria, a name which is also included 
in their list ?. 
Mr. Bates, who found allied species throughout the Amazons region, observed them 
in company with Gynecia dirce, all settling on the trunks of trees, but the Hetima 
lying with its wings flat, in the manner of the Ageronie. 
We never met with Ectima ourselves, as the most northern point of its range is 
Nicaragua, where Belt obtained it. In the neighbourhood of Chiriqui it appears to be 
abundant, judging from the number of specimens Mr. Champion has forwarded to us. 
AGERONTIA. 
Ageronia, Hiibner, Verz. bek. Schm. p. 41 (1816), partim. 
The species usually placed in Ageronia naturally group themselves into two sections, 
each of which presents sufficient characters to justify its being considered a genus. 
These differences are pointed out below. 
The name Ageronia was applied by Hubner to four species, all belonging to the 
genus as hitherto understood. Three of these, however, go with A. arethusa into 
Boisduval’s genus Peridromia ; the fourth, Ageronia chloe, therefore, we retain as the 
type of Ageronia. With this species we place five or six others, all having the essential 
characters of Ageronia. In Central America we find four species of Ageronia as thus 
restricted, one being the widely spread A. ferentina, which ranges from Mexico and 
some of the Antilles to the Argentine Republic; of the rest, 4. g/auconome is found 
from Southern Mexico to Nicaragua, A. atlantis is common to Mexico and Guatemala 
but nowhere abundant, and A. lJedaps has hitherto only occurred in the Mexican State 
of Durango. 
The peculiar habits of the Ageronie have been frequently described, how they settle 
on the trunks of trees with the wings expanded and the head down, and how when 
pursuing one another they produce a sharp cracking noise apparently with the wings ; 
but this point has never yet been satisfactorily determined. 
The subcostal of the primaries (A. atlantis) emits two branches before the end of the 
cell; the upper discocellular is very short, the middle convex, and the lower also slightly 
convex in a simple curve and meeting the median nervure at the origin of the second 
branch. The front legs of the male have a rather stout coxa about=#% femur-+tro- 
chanter; tibiamfemur; tarsus with sutures of joints sometimes visible=tibia. Eyes 
smooth. Antenne with 48 joints, whereof 9 form a moderate club. Palpi slightly 
hairy ; terminal joint short, about=% the middle joint, which is of nearly uniform width 
throughout. The male secondary sexual organs have a pointed tegumen, beneath 
which in the anal cavity is a strong spine directed outwards ; the harpagones are 
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