Bucculatrix atrosignata Braun 1963

Bucculatrix atrosignata new species (Figs. 167, 167a, 168, 168a, 168b.)
Face white, tuft white with a few pale gray hairs ; eye-caps white, antennal stalk white with conspicuous blackish annulations. Thorax and fore wings white. The following description is based on the female type, with differences in the male allotype noted ; the marks are formed by groups of broadly blacktipped scales conspicuously contrasting with the pure white ground color, and
by a few grayish scales along basal third of costa ; at two-thirds of costa, a rather small patch of black -tipped ocherous scales (diffuse in the male and merely faintly brown-tipped) ; on dorsum, opposite this patch, a large irregular patch of black-tipped scales (in the male these scales pale brown-tipped as in the costal patch) ; the apical fourth of the wing is conspicuously blackish by an accumulation of the black-tipped scales, producing toward apex an evenly peppered aspect, and including some almost black spots (in the male, the scales of this area are pale brown-tipped as in the other marks) ; the inner margin of this area is irregular and produced toward base in the middle of the wing; a small triangular pure white costal spot indents it just before apex; some black-tipped scales project into the cilia along termen ; cilia pure white. Hind wings and cilia white. Legs white, a little shaded with gray, tarsal segments narrowly gray tipped.
Alar expanse 6.5 to 7 mm.
Male genitalia (figs. 168, 168a, 168b). Posterior margin of eighth sternite sclerotized ; harpes almost cylindric, broadening at base, apices with strong conical setae; socii very long, slender, enlarging at the setose apex; a pair of spinulose ridges meeting at an acute angle below the anal opening ; anellus large, exceeding tegumen ; aedeagus short, cylindric, tapering slightly to the triangular aperture ; vinculum a broad band, its posterior margin strongly sclerotized. Scale sac (fig. 168b) indistinctly bilobed. scales few and elongate.
Female genitalia (figs. 167, 167a). Entire ninth segment strongly sclerotized, apophyses heavy, clavate ; rasping rods developed, vaginal setae large ; ductus bursae expanding before the circular ostium ; signum characteristic, each of the larger spine-bases of a signum rib dividing into three acute forks, each emitting a slender spine (fig. 167a).
Type— 9, Eureka, Utah, May 30, 1911 (Tom Spalding) [U.S.N.M., Type No. 65031].
Allotype— $ , same data as the type [U.S.N.M.].
Food plant and early stages unknown.
The female is chosen as the type because of its perfect condition, with contrasting black marks on a pure white ground. The male, though lacking the sharp contrast between ground color and markings, is recognizable as the same species.
Bucculatrix atrosignata is distinct in wing color and marks, and in genitalia from all other species of our fauna.

Bucculatrix atrosignata is a moth in the family Bucculatricidae. It was described by Annette Frances Braun in 1963. It is found in North America, where it has been recorded from Utah.

The wingspan is 6.5–7 mm. The forewings are white. The markings are formed by groups of broadly black-tipped scales and a few greyish scales along the basal third of the costa. The hindwings are white.