Bucculatrix evanescens Braun 1963

Bucculatrix evanescens new species (Figs. 98, 98a, 103, 103a, 104.)
Face and head creamy white, tuft tinged with straw color centrally ; eye-caps creamy white, antennal stalk annulate with pale gray. Thorax and fore wings creamy white. The fore wings may be almost immaculate, except for a faint yellowish shade along basal half of costa, a small black dot at end of cell and a few minute black specks in the cilia, or with faint longitudinal pale yellowish shading, sometimes a single black scale below basal fourth of fold, a few black scales at two-thirds of fold, a few scattered dark scales in the yellowish streaking, especially at outer third of costa, and two faint lines of scales in the cilia (all these markings present and most distinct in the type S, faint or absent in the allotype 9, distinguishable in some of the paratypes). Hind wings and cilia creamy white, concolorous with the fore wings. Legs creamy white, sometimes outwardly shaded with pale gray, tarsal segments dark-tipped. Abdomen pale grayish straw-colored, with some darker shading. Alar expanse 5.8 to 7 mm.
Male genitalia (figs. 98, 98a). Harpes club-shaped, apex with heavy widely spaced setae; tegumen long, socii very small, widely separated, only the small rounded apex setose; anellus a truncated cone; aedeagus cylindric, forked at apex, with opposing teeth ; vinculum quadrate. Scale sac bilobed.
Female genitalia (figs. 103, 103a, 104). Ovipositor setose, membrane microscopically spinulose; sternite of segment 8 clothed with pigmented specialized scales, of which two groups of such specialized scales are most prominent, one of these attached to the intersegmental membrane at its posterior margin and lying lateral to ostium, the other attached along a longitudinal band near the lateral margin ; other specialized scales, some long, some short and more or less trapezoidal are present along the lateral margins of the eighth sternite (fig. 104) ; ostium at anterior margin of 8, the furrow beyond with sclerotized branched margins, ending anteriorly in curved free points ; inception of ductus seminalis on dorsal side of ostium ; ductus bursae narrow in segment 7, at first abruptly and then gradually widening to bursa ; signum open ventrally between its longest ribs, narrow and weak dorsally; signum ribs strongly sclerotized, spines few.
Type.— S, Olancha, Inyo County, California, June 16-23 [U.S.N.M., Type No. 65021].
Allotype. — 9, same data as the type [U.S.N.M.].
Paratypcs. — 1 $ , Olancha, Inyo County, California, June 16-23 [U.S.N.M.] ; 1 $, Havilah, Kern County, California, June 1-7 [U.S.N.M.]; 3 9, Boyce Thompson Arboretum, Superior, Arizona, July 11, 12, 13, 1939 (A. F. Braun) [A.F.B.Coll.].
Food plant and early stages unknown.
The creamy white fore wings may aid in recognition of this species, hut the unique genitalia, especially the remarkahle scaling of segment 8 of the female will identify this species with certainty. The wing expanse of the three Arizona specimens measures a scant 5.8 mm.

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