Comprehensive Description
provided by Memoirs of the American Entomological Society
Elachista oxytypa new species (Figs. 80, 80a, 118.)
Head pale brownish gray, the scales tipped with dark brown ; palpi pale gray, outer side of second segment darker, silvery above, third segment mostly pale, with tip blackish. Antennae gray, paler in the female. Thorax gray, tegulae pale in the female. Fore wings gray, the scales pale at base, unevenly tipped with dark brown, resulting in an irregularly irrorated dark grayish brown appearance ; near middle of dorsum, a somewhat oblique grayish white bar extends to the upper margin of the cell in the male type ; in the male paratype, this mark is reduced in size and obsolete beyond the fold ; in the allotype, female, the corresponding mark is a creamy white fascia oblique on dorsum, and curving toward base as it approaches costa. At tornus, a small triangular spot, grayish white in male, creamy white in female ; farther from base on costa. a similar but larger spot. The scales at apex form a point, and the row of scales projecting into the cilia extends around apex in a sharp curve. Costal cilia gray, cilia below apex whitish at base in male, whitish in female except at tips. Underside of wings densely irrorated with black. Hind wings broad, tapering abruptly, gray, densely irrorated with dark brown ; paler in female. Legs dark brownish gray, with the usual pale bands and tips of segments not sharply contrasting. Abdomen dark brownish gray above and below.
Alar expanse: 10.5 to 11 mm.
Male genitalia very similar to those of irrorato, but sacculus processes more slender and harpe narrower (fig. 80), and tip of aedeagus unmodified; two cornuti, a strong short, acute, broad-based spine, and a similar minute spine beyond it (fig. 80a).
Female genitalia (fig. 118): dilated portion of ductus bursae deeply cupshaped, ductus bursae sclerotized only to anterior margin of segment 7; signurn as in irrorata.
Type.— 6, Bradore Bay, Quebec, 8,VIII,i930 (W. J. Brown), [C. N. Coll., Type No. 5740]."
Allotype. — 9 , Bradore Bay, Quebec, 8,VIII,i930 (W. J. Brown). [C. N. Coll., Type No. 5740].
Paratype. — 6 , same data as the type [C. N. Coll., No. 5740].
Food plant and early stages unknown.
Superficially this species may be separated from its allies by its grayish appearance, with weakly contrasting pale marks in the male, by the point of scales at apex, and the sharp curve of scales around apex with contrasting costal and terminal cilia. Veins M 2 and M :1 -fCu, a of the fore wing are separate. On genitalic characters, the cornuti of the male, and shape and length of the sclerotized portion of the ductus bursae distinguish it.
- bibliographic citation
- Braun, A.F. 1948. Elachistidae of North America (Microlepidoptera). Memoirs of the American Entomological Society vol. 13. Philadelphia, USA