of Heterocera from Japan. 395 



8. suhfascia more nearly. Mr. Jonas assures me thej are 

 sexes. 



7. Spilarctia moUicuIa, n. sp. 



? . Pinky cream-colour ; primaries with a dot at the centre 

 of costa, a spot at the superior angle of the cell, and another in 

 the discoidal interspace blackish ; secondaries with a spot on 

 upper discocellular, a second near the apex, and three (sub- 

 marginal) near the anal angle blackish ; margins of collar and 

 eyes and anterior coxaj rose-red ; abdomen rose-red, testaceous 

 at the anal extremity ; three or four dorsal black dots ; wings 

 and body below creamy whitish, the smaller spots indistinct. 

 Expanse 1 inch 11 lines. 

 Hakodate i^Whitehj). 



8. Euprepia phceosomay n. sp. 



? . General pattern and coloration of E. caja^ but the white 

 banding of primaries more simple, the secondaries paler at 

 the base, with spots fewer and not yellow-bordered, the anterior 

 half of the collar red, with a white spot at the lateral angles ; 

 the outer margin of the tegul^ white ; the abdomen brown, 

 with rose-red hind margins to the segments. Expanse 2 

 inches 8 lines. 



Yokohama [Jonas). 



Readily distinguished by the colour of the body. 



Thanatarctia, n. gen. 



Allied to Phragmatohia.j but the primaries trigonate, the 

 lower radial and third median branches springing from one 

 point and close to the second median branch, the anterior 

 margin of the cell of secondaries less receding, the antennae of 

 male widely pectinated. 



Type T. infernalis. 



9. Thanatarctia infernalis^ n. sp. 



Wings and thorax black-brown ; margins of collar, eyes, 

 palpi, and the pectus rose-red ; abdomen rose-red, with a 

 macular dorsal black line. Expanse 1 inch 5 lines. 



Hakodate (Stevens) . 



Rhyparioides, n. gen. 



Agrees in neuration with Rhyparia and Diacrisia, but 

 differs from the former in its much more slender body, and 



