1S(54.] 119 



a large brown area ; in the space below the long streak is separated at the 

 outer third, corresponding to the streak lying along the internal ner- 

 vure, which has a detached dark spot without, just above the internal 

 angle. None of these streaks approach very near the outer margin. 

 A marginal row of dark spots, some of them nearly obsolete. 



Secondaries with a geminate large dark dot near the middle of the 

 outer margin. Legs: fore tibiae yellowish, tarsi dark above. Two poste- 

 rior pairs of legs sparsely dotted with brown. Abdomen white with a me- 

 dian and subdorsal row of spots, and two subventral rows. Tip obtuse. 



This species will be easily recognized as being pure white with dark 

 brown streaks on the fore-wings which terminate at a distance from 

 the edge of the wing. In structure it is by its form and narrow wings, 

 with very oblique outer edges, like A. arge.^ and forms a passage from 

 Arctia to Sicrarctia. 



Length .30. Exp. wings 1.50 inches. 



New York ((Jalverley). I am indebted to Mr. Calverley for the loan 

 of this fine, and apparently, very rare species. 



SEIEARCTIA * nov. gen. 



Owing to the fine powdery scales that cover the body, the head seems 

 miich freer from the thorax than in Arctia. The front is broader 

 throughout, more convex, where in Arctia it narrows towards the front 

 edge, and becomes flattened. Palpi porrect large and long, tips obtuse, 

 surpassing the front by the entire length of the third joint. Li Arctia 

 the palpi do not reach beyond the front. 



Thorax moderately stout, finely scaled. Primaries long and narrow, 

 the breadth being contained two and one-half times in the length. 

 Costa straight on the basal half, from thence more convex throughout 

 than in A. ar<je. The apex is produced more than usual, obtusely 

 pointed. Outer edge very oblique, one-half as long as the costa, and 

 nearly equals the length of the inner edge. In the neuration this 

 genus is more like that of Halesidota than Arctia, since the second and 

 third subcostals are curved very near the costa. Apical interspace 

 much larger than in Arctia, while the fifth s. c. is longer and straighter, 

 as are the three first median nervules, the 3rd being curved more, while 

 the semi-ovate space enclosed between the 1st and 3rd is longer and 



'*atipa stripe, Arctia. 



