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Northern Dusky-wing

Thorybes pylades

Plate XLVIII — Northern Dusky-wing is Fig. 6
Plate XLVIII — Northern Dusky-wing is Fig. 6
Northern Dusky-wing (detail)
Northern Dusky-wing (detail)

Butterfly.--The upper side is represented correctly in Plate XLVIII. On the under side the wings are dark brown, shading into hoary-gray on the outer margins. The hind wings are crossed by irregular basal, median, and postmedian brown bands of darker spots, shaded with deeper brown internally. The translucent spots of the upper side reappear on the lower side of the fore wings. Expanse, 1.60 inch.

Early Stages.--These are elaborately described in the pages of Dr. Scudder's great work. The caterpillar feeds on clover, Lespedeza, and Desmodium.

This insect is found throughout the United States and Canada, but is not as yet reported from the central masses of the Rocky Mountain region. It probably, however, occurs there also in suitable locations. It is very common in New England.