NO. 1456. NEW GEOMETRID MOTHS— WARREN. 543 



Locality. — St, Jean, Maroni River, French Guiana, April, 190-i. 



Resembles E. aJhlcollarU Warren in the white shoulders, but larg-er, 

 and distino-uished b}' the pale curved line; that species also occurs in 

 French Guiana. 



Type.—Q^i. No. 9422, U.S.N.M. 



Genus GONORTHUS Butler. 

 GONORTHUS BILINEATA, new species. 



Forevnng. — Pure white, the fringe included; the only markings are 

 the traces of a gray submarginal line; these onl}^ visible at costa and 

 on inner margin. 



Hindwlng. — With some submarginal stria? which on inner margin 

 resolve themselves into two double lines. 



Under side pure white. 



Thorax and abdomen white; face and palpi white below, red-brown 

 above, vertex and base of antenna? bronzy purple; pectinations ferru- 

 ginous; collar narrowly orange; legs white; fore and middle femora 

 and tibiae deep yellow; the knees black. 



Expanse ofviingx. — 38 mm. 



Locality. — St. Jean, Maroni River, French Guiana; 1 male, July, 

 1904. 



Type.—G2ii. No. 9423, U.S.N.M. 



Genus IRA Walker. 

 IRA ALBIRENATA, new species. 



Like Lra decurtaria Herrich-Schaelfer in size, shape, and markings, 

 differing only in the following points: the costal blotch before apex, 

 instead of being elongated and tilled up with blackish, is short, rounded, 

 somewhat kidney-shaped, tilled with white, with its center on costa of 

 the ground-color, the blotch is nearer the apex, and consequently the 

 outer lunulate-dentate line starting from below its outer edge is nearer 

 the hind margin, and the central area is therefore broader; and, sec- 

 ondly, this central area is of the same tint as the rest of the wings, not 

 filled up with darker as in decurtaria,' both wings have an olive-fuscous 

 tinge, becoming dull lilac-gray toward the hind margin. 



Expanse of wings. — 54 mm. 



Locality. — Carabaya, southeastern Peru; 1 male. 



Type.~C^i. No. 9424, U.S.N.M. 



Genus MICROGONIA Herrich-Schaeffer. 

 MICROGONIA ALBICOMMA, new species. 



Forewing. — Flesh-colored ochreous, minutely black speckled; first 

 line hardly traceable, vertical, outcurved above and below median; 

 outer line broad, chestnut-brown, inwardlj^ diffuse, outwardly well 



