LIMNAS.—ESTHEMOPSIS. 411 
4. Limnas acroleuca. 
Limnas acroleuca, R. Feld. Verh. k.-k. zool.-bot. Ges. Wien, 1869, p. 4677. 
L. cephise affinis sed alis nigricantioribus et anticis albo ad apicem terminatis forsan distinguenda. 
Hab, Mexico, Mazatlan (Forrer), Huahuapan (Hedemann 1), Oaxaca (Deppe). 
It is perhaps doubtful if this insect is really separable from L. cephise. Almost the 
only tangible difference is the presence in the former of a white tip to the apex of the 
primaries, not seen in the latter. This character of a white or yellow apex in species 
of Limnas is one that shows considerable variation, and we use it to differentiate L. 
acroleuca with some hesitation. 
The first specimens of this insect sent to Europe were those obtained by Deppe at 
Oaxaca, which are now in the Berlin Museum. It has since been found at various 
places, but seems to be more abundant near Mazatlan than elsewhere. 
ESTHEMOPSIS. 
Esthemopsis, Feld. Reise d. Nov. Lep. p. 306 (1865). 
Pseudopheles, Bates, Trans. Ent. Soc. ser. iu. v. p. 544. 
Esthemopsis clonia is the type of this genus, a species discovered in Colombia by 
Lindig, and now traced northward through the State of Panama to Nicaragua. 
The genus contains nine or ten species, all agreeing fairly well in their generic 
characters ; with these we now include two others which have some characters in 
common with EHsthemopsis, while others are certainly aberrant, but as each of these 
species is represented by a single individual, we are unwilling to attempt to place them 
definitely, and they will be found at the end of the account of the family. 
The northern limit of the range of Esthemopsis is Guatemala; thence it passes south- 
wards throughout the Amazons valley to Maranham in North Brazil. Four species 
occur within our region, one of which is the aberrant form referred to above. 
The subcostal nervure of the primaries of £. clonia emits two branches before the 
end of the cell and one beyond it ; the upper radial meets the subcostal beyond the 
cell; the atrophied middle discocellular is at right angles to the subcostal; the lower 
discocellular is bent in the middle, the upper half atrophied, the lower meeting the 
median some way beyond the origin of the second branch; the costal and median 
sides of the cell are subequal. Secondaries with a strong basal nervure, both disco- 
cellulars atrophied, the upper meeting the subcostal at an obtuse angle beyond the 
origin of the first branch, the lower meeting the median at a large acute angle beyond 
the origin of the second branch; the costal side of the cell is shorter than the median 
side. ‘The front legs of the male have the coxa considerably produced beyond the tro- 
chanter-coxal joint ; the femur =% coxa, dilated towards the distal end; tibia > femur 
+trochanter, tarsus=tibia, two-jointed, with two short sete at the extremity. The 
front legs of the female have the second joint nearly equal to the fifth, the fourth 
3 G2 
