OF NORTH AMERICA. 133 



marked beneath, making a submarginal row of four spots, with a fifth 

 less strongly marked near the costa. I have yet to see an eastern 

 specimen exhibiting this coloration, but in the absence of knowledge 

 of the preparatory stages I have deemed it best for the present, to 

 refer the specimen to S. virginica. S. virginica is abundantly separ- 

 ated from S. vestalis and latipennis by the color of the anterior legs, as 

 well as by the want of the silvery gloss on the wings of the two latter 

 species. Its nearest ally is S. uriiac of Europe, which wants the 

 black spots on the secondaries and is much less purely white, while 

 the body is shorter and stouter with the black dorsal spots less strongly 

 marked. 



2-SPILOSOMA LATIPENNIS, N. s (PI. 6, fig. 5., $ ) 



?, White. Head, thorax and patagia white. Eyes black. Palpi 

 brownish, white beneath. Legs white, with the coxa and femora of 

 the anterior pair bright pink inwardly ; tibiaa and tarsi of the same pair 

 black inwardly, white outwardly. 



All the wings are pure silky white, immaculate. The costa of the 

 primaries is decidedly convex from the base to the apex. 



Expanse of Wings, ? 1.75 inches ; length of body, 0.70 inch. 



Habitat. — -Atlantic States (Angus.) (Coll. Stretch.) 



Described from one imperfect broken ? (wanting the body) re- 

 ceived from Mr. James Angus, of West Farm, N Y. , without any 

 definite locality attached to the specimen. The specimen, though 

 broken, is clearly not to be referred to any North American species 

 hitherto described. While the red coxas show its relationship to S. 

 vestalis the convex costa, which makes the wings proportionately 

 broad, and the slenderer, less hair thorax, abundantly separate it 

 from that species. From S. virginica it may be distinguished not only 

 by the color of the anterior coxce, but by the peculiar glossy, silky 

 shade of the wings, which in this respect more resemble S. vestalis. 

 From ^S". congrua it is separated by the immaculate wings. 



3-SPLIOSOMA VESTALIS, (PI. 6, fig. 7 5.8 ? .) 



Spilosoma vestalis, Packard, Proc. Ent. Soc. Phil. vol. 3, p. 



(1864.) 

 <5 . White. Heail, prothorax. thorax and patagia white 

 densely clothed with long hairs, so that the individual parts are not 



