PROC. ENT. SOC. WASH., VOL. 24, NO. 9, DEC., 1922 217 



the outer margin irrorated with white; a terminal black line with white points 

 on veins; cilia light vinaceous fawn tipped with white and with deep mouse gray- 

 spots opposite veins followed by a similar shade to tips. Hind wings white 

 suffused with cupreous avellaneous becoming darker on termen; cilia with a 

 light buff line at base followed by a fine dark line expanding and dark spotted 

 towards apex, the outer half of cilia white. Fore wings below hazel, the inner 

 margin broadly white; interspaces beyond cell streaked with whitish; a fine 

 black line on discocellular; the dark outer line followed by a light buff spot on 

 costa; a terminal black line. Hind wings below light cupreous buff, the costa 

 finely and a spot at apex hazel; a dark point at upper angle of cell, and traces of a 

 postmedial line. 



The female usually has an antemedial black streak below the cell in place of 

 the spot, and a small cluster of scales on submedian. An interesting female 

 variety, taken by the Cornell University Expedition, has a large triangular 

 fuscous spot from base of costa to medial line. 



Expanse, 22 mm. 



Habitat. Corumba, Brazil. 



Cotype. No. 25790, U. S. N. M. 



Type at Cornell University to which we are indebted for speci- 

 mens; these were collected by Dr. W. T. M. Forbes, entomolo- 

 gist for the Cornell University Expedition. 



The species is nearst A . pagchryson = deras Dyar. 



Tancoa, new genus. 



Male. Palpi upcurved, slender, reaching well above head scaled behind with 

 rather long hairs especially on third joint. Antennae fasciculate; a short tuft 

 of hair from basal joint. Fore wings long and narrow, the outer margin oblique. 

 Vein 3 from near lower angle of cell; 4 and 5 from lower angle or stalked; 6 from 

 upper angle; 7, 8, 10 stalked, 9 coincident with 8; 11 from cell. Hind wings: 

 vein 3 from near lower angle of cell; 4 and 5 stalked; 6 from upper angle; 7 

 anostomosing with 8. Anal segment of abdomen with long tutts. Hind tibiae 

 hairy. 



Type of genus. DeuL'rollyta calitas Druce = Pococera sphae- 

 ophora Dyar. 



Distinguished from all groups of Pococera by the absence of 

 vein 9 on fore wing. 



In Tancoa (Macalla) attenualis Hampson veins 4 and 5 on 

 fore wing are very shortly stalked; in Tancoa (Pococera) crinita 

 Schaus veins 4 and 5 on fore wing are well stalked. 



Tancoa goanta Schaus differs in having aborted palpi, the 

 antennae serrate and shortly fasciculate. 



Tancoa erlupha, new species. 



Female. Palpi whitish buff irrorated with black, densely so beyond base and 

 tufted above with long fine black hairs, the third joint naked, vinaceous pink. 

 Head mottled fuscous and light buff. Collar medially and thorax steel color, 



