1909] Dyar: New Species of Insects. 127 



angular pink marks on inner margin, one near base of costa 

 nearly crossing wing and irregular markings in the cell outward- 

 ly to the small subhyaline dot; a long white mark on costa and 

 a bar .just before the small dot. Apex ocher, crossed by brown 

 veins. Hind wing subhyaline white, the inner margin broadly 

 and minute discal dot pink; costal margin ocher. Beneath the 

 fore wing has the subhyaline mark repeated, base orange-red, 

 costa purplish, apex ocher as above. Expanse, 47 mm. 



One $, Hoorie, British Guiana (C. W. Beebe). 



Type.— No. 12657, U. S. National Museum. 



Family LITHOSIIDAE. 



Thyonsea, new genus. 



Structure and venation of Thyone Walker, but vein 6 of the 

 fore wing stalked with 7-9. 



' Type, Thyone perbella Schaus. 



Thyonsea dremma, new species. (Fig. 41, No. 4.) 



Head yellow; thorax orange brown; abdomen pale yellow. 

 Fore wing orange yellow; a broad median stripe of this color 

 edged on each side with a purplish shade. Veins in the basal 

 and apical areas lined with red. Hind wing yellow with a slight 

 fuscous tint. Expanse, 17 mm. 



One $ , Hoorie British Guiana (C. W. Beebe) . 



Type.— No. 12658, U. S. National Museum. 



Allied to Thyonsea perbella Schaus, but the veins are lined 

 with red instead of blackish and the median band is broader, with 

 its edges less parallel. 



mice biota, new species. (Fig. 41, No. 5.) 



Head gray, yellowish around the margins of the vertex and 

 base of antennae. Tegulae yellow, shading to red in front. 

 Thorax gray, the patagia yellowish within. Abdomen crimson, 

 with long lateral and terminal tufts. Fore wing slaty gray, a 

 broad pale yellow stripe along submedian fold from base to 

 termen. Hind wing with the margin strongly emarginate in 

 the middle between the submedian fold and vein 3, the anal angle 

 rounded. Pale crimson, the apex broadly gray. Expanse, 15 

 mm. 



One $ , Hoorie, British Guiana (C. W. Beebe). 



Type.— No. 12659, U. S. National Museum. 



Allied to mice minuta Butler, but with the stripe on the fore 

 wing much broader, mice minuta is known in a single female 



