. Bulletin. Natural history; Natural history -- Montana. 150 BULLETIN UNIVERSITY OF MONTANA. AFRANIUS' DUSKY-WING, Thanaos afranius, Fig. 110. Thanaos afranius. Butterfly—The hind wings on the upper side in the male are almost solid black, the fringes paler. On the underside there is a double row of light spots along the margin of the hind wing in both sexes. On the upper side the female is generally lighter in color than the male. Early Stages—Unknown. Distribution—Common in Arizona. Given in Dyar's list. We have not taken it. One specimen from Bozeman, one from Helena, and one from
. Bulletin. Natural history; Natural history -- Montana. 150 BULLETIN UNIVERSITY OF MONTANA. AFRANIUS' DUSKY-WING, Thanaos afranius, Fig. 110. Thanaos afranius. Butterfly—The hind wings on the upper side in the male are almost solid black, the fringes paler. On the underside there is a double row of light spots along the margin of the hind wing in both sexes. On the upper side the female is generally lighter in color than the male. Early Stages—Unknown. Distribution—Common in Arizona. Given in Dyar's list. We have not taken it. One specimen from Bozeman, one from Helena, and one from unknown locality we have referred to this species. Subfamily PAMPHILINAE. In this subfamily is included the greater number of our smaller skippers; however, some of the species are larger in size than many of the Hesperiinae. All of our tawny skippers belong to this subfamily, as well as some black or dark-brown species. The antennae usually have a stout club, with a short recurved tip; sometimes this tip is wanting. Fig. 112 shows plainly the venation. In the majority, of our species the males can be recognized by the brand; this is a conspicuous dark patch crossing the disk of the fore wings obliquely. This brand is a compli- cated organ, composed of tubular scales, the androconia, that are the out- lets of scent glands, and of other scales of various shapes; the brand is wanting in some species. The Pamphilinae are difficult to study, owing to the slight differences in allied species. Either sex, moreover, resembles the same sex of other species much more closely than it does the opposite sex of the same species; and the difficulty is further augmented from the fact that in several species there are two distinct forms of females which differ from each other more than either does from the females of certain other species. These species have three forms, one male and two female. Key to Genera. 1. Antennae with the point of the club absent; end obtuse Antennae with the p
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