Genus Achalarus 
Mountain region. It probably, however, occurs there also in 
suitable locations. It is very common in New England. 
(2) Thorybes bathyllus, Smith and Abbot, Plate XLVIII, 
Fig. 5, $ ; Plate II, Fig. 32, larva; Plate VI, Fig. 24, chrysalis 
(The Southern Dusky-wing). 
Butterfly .—Easily distinguished from the preceding species by 
the much larger size of the translucent spots on the fore wings. 
Expanse, 1.40-1.50 inch. 
Early Stages. —The habits of the larva are very similar to those 
of the preceding species, and the caterpillar feeds on herbaceous 
leguminosae. 
It ranges from the Connecticut Valley, where it is rare, south¬ 
ward along the coast and through che Mississippi Valley as far 
south and west as Texas. 
(3) Thorybes aemilia, Skinner, Plate XLVI, Fig. 39, <$ (Mrs. 
Owen’s Dusky-wing). 
Butterfly .—This little species, which may readily be identified 
by the figure of the type given in the plate, is as yet quite rare in 
collections. We know nothing of the early stages. The types 
were taken at Fort Klamath, in Oregon. Dr. Skinner named it 
in honor of the estimable wife of Professor Owen of the Univer¬ 
sity of Wisconsin, the discoverer of the species. Expanse, 1.20 
inch. 
(4) Thorybes epigena, Butler, Plate XLVIII, Fig. 13, 6 
(Butler’s Dusky-wing). 
Butterfly .—Readily distinguished by its large size, the con¬ 
spicuous white fringes of the hind wings on the upper side, and 
the broad white marginal band of these wings on the under side. 
Expanse, 2.00 inches. 
Early Stages. —Unknown. 
This insect is common in Arizona and Mexico. 
Genus ACHALARUS, Scudder 
Butterfly.— The antennae and palpi are as in the preceding 
genus. The neuration is represented in the cut. The hind wing 
is slightly lobed at the anal angle; the fore wing may or may not 
be provided with a costal fold. 
(1) Achalarus lycidas, Smith and Abbot, Plate XLV, Fig. 10, 
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