242 PROCEEDINGS OF THE NATIONAL MUSEUM vol.90 



Female genitalia. — ^Ductus biirsae lightly sclerotized posteriorly. 

 Signum present. 



Remarks. — This genus is similar to Fdbiola in having veins 7 and 8 

 of the fore wing coincident. It may be distinguished, however, by the 

 presence of pecten on the basal segment of the antenna, the presence of 

 strong cornuti on the vesica of the male, and the presence of a signum 

 in the female. 



There is a single North American species belonging to this genus. 



DECANTHA BOREASELLA (Chambers) 



Plate 20, Figuees 125, 125a ; Plate 39, Figuee 211 



Oecophora horeasella Chambeks, Can. Ent., vol. 5, p. 189, 1873 ; Cincinnati Quart. 

 Journ. Sci., vol. 2, p. 114, 292, 1875 ; U. S. Geol. Geogr. Surv. Terr. Bull. 3, 

 p. 129, 141, 1877. — Riley, in Smitb, List of Lepidoptera of Boreal America, 

 No. 5550, 1891.— BuscK, in Dyar, U. S. Nat. Mus. Bull. 52, No. 5921, 1903. 



Borlhai(senia horeaseUa (Chambers) Kearfott, in Smith, Check list of the 

 Lepidoptera of Boreal America, No. 6468, 1903 (as a synonym of Bork- 

 haiisenia horkhausenii [Zeller]). 



Decantha ioreasella (Chambers) Busck, Proc. U. S. Nat. Mus., vol. 35, p. 202, 

 1908. — Barnes and McDunnough, Check list of the Lepidoptera of Boreal 

 America, No. 6497, 1917. — Meybick, in Wytsman, Genera insectorum, fasc. 

 180, p. 24, 1922.— Forbes, Cornell Univ. Agr. Exp. Stat. Memoir 68, p. 

 248, 1923; in Leonard, Cornell Univ. Agr. Exp. Stat. Memoir 101, p. 546, 

 1928.— Gaede. in Bryk, Lepidopterorum catalogus, pt. 88, p. 23, 1938.— Mc- 

 Dunnough, Check list of the Lepidoptera of Canada and the United States 

 of America (Part 2, Microlepidoptera ) , No. 8358, 1939 (as a synonym of 

 Decantha horkhausenii [Chambers]). 



Borkhausenia lorkhauscnii (Zeller) Dyar, Proc. U. S. Nat. Mus., vol. 27, p. 934, 

 1904. 



Labial palpus white overlaid and irrorated with black. Antenna 

 checkered black and white. Head black, with a reddish luster and 

 mixed with white posterodorsally. Thorax and fore wing shining 

 golden ; base of tegula and collar narrowly black ; base of wing black, 

 outer margin of the black basal patch concave and edged with white ; 

 the color of the basal patch is narrowly continued along the costal 

 edge to apical fourth; at basal third a triangular area (broadest at 

 costa) of black crosses the wing to the inner corner of a quadrate 

 black spot on the inner margin ; from middle of costa, to apical fourth, 

 a rectangular black area extending past the middle of wing, and 

 joined by its inner corner to the outer corner of the spot on the inner 

 margin; the outer corner of the rectangular costal spot extends to 

 tonius where it broadens and fades to reddish brown; all spots are 

 edged outwardly with white and the spot on the inner margin is 

 edged inwardly with white: at apex a black spot; icilia golden 



