THYRARCTIA. 



9 



Genus THYRARCTIA, uov. 



Type, T. cedo-nulli. 



Proboscis small; palpi upturnod, not reaching vertex of head, the 2nd joint 

 fringed with scales in front, tiie ord minute ; antennas pectinate with moderate 

 branches; a small triangular crest between antenna; tegulic with curled hair 

 at apices; thorax with high triangular crest ; tibite fringed with long hair; 

 abdomen with lateral anal tufts. Fore wing with the costa arched ; the tennen 

 strongly angled at vein 5 : vein 3 from long before angle of cell ; 4, 5 from 

 angle; 6 from upper angle; 7. 8, 9. 10 stalked, 10 from before 7 ; 11 from cell. 

 Hind wing with the termen slightly angled at veins 5 and 16; vein 3 from 

 before angle of cell, 5 from angle, 4 absent ; 6, 7 coincident and shortly stalked 

 with 8. 



*n94. Thyrarctia cedo-nulli. 



Bomhyx cedo-nulli, Stoll, Pap. Exot. iv. pi. 346. A, B (1782) ; Kirby, Cat. 

 Het. p. 852. 



S. Pale red-brown; palpi white in front; froiis barred with 

 white ; basal joint of antennae white ; legs with extremities of 

 femora and tibia3 and the greater part of tarsi white; abdomen with 

 orange subdorsal fasciae and lateral black spots except on terminal 

 segments, the ventral surface white. Fore wing with slight white 

 striga below base of cell ; an oblique line from origin of vein 3 to 

 inner margin before middle ; some dark brown above and below 



Fig. 1. — Thyrarctia cedo-nulli, ^. 



origin of vein 2, bisected below it bj' a pale striga : the end of cell 

 and area just beyond it dark suffused with blue-grey, and with 

 blue-grey lines on its inner edge and discoceUulars and an inverted 

 decanter-shaped yellowish hyaline mark in end of cell ; a point 

 beyond the cell below vein 6 and three irregular spots between veins 

 2 and 5 with three spots on termfm beyond them ; a triangular 

 subapical patch with its inner edge indented and crossed by two 

 brown veins ; cilia whitish intersected with brown. Hind wing 

 with the interispaccs betAveen veins 2 and 5 hyaline, the inner area 

 darker. 



Ilah. Surinam ; Brazil, Rio Janeiro. Exp. 56 millim. 



