124 [June 



black brown submarginal baud separated by a ligbt brown abbreviated 

 basal band from the inner dusky portion of the wing, and the other 

 has the wing uniformly dusky to near the base of the fringe, while in 

 both cases the discal dots are present, though obscure. 



% . Length .(50. Exp. wings 1.55. 



Mendocino City. Cal. (Mus. Comp. Zool. A. Agassiz). California 

 (Edwards). 



LEUCARCriA* nov. gen. 



Front thickly covered with short hairs. Antennse well pectinated, 

 the pectinations in the 9 being as long as the joints of the antenna 

 themselves, which are annulated above with white and black. Clypeus 

 short, somewhat sunken between the eyes ; the sides nearly straight 

 front edge square, slightly notched at the foramina. Labrum short 

 obtusely rounded. Mandibles minute, discoverable by a few seta3. 

 Maxillffi stout and well developed. Palpi depressed, hardly surpassing 

 the front; 2-jointed, the joints of nearly equal length, the scales on 

 the tip of the basal joint surpassing the tip of the 2nd. 



Thorax and abdomen stouter than usual. The forewings are convex 

 towards the unusually produced apex ; outer margin very oblique, 

 slightly convex. Secondaries : costa hardly bent in the middle ; apex 

 produced ; outer margin nearly as long as the costa, and regularly 

 convex, reaching a third of the way to the tip of the abdomen. Legs 

 stout, short, femora pilose beneath. Two pairs of tibial spurs very 

 approximate and unequal in size. The tip of the abdomen is conical 

 in the "S , very obtuse in the 9 • 



While this genus is of much larger size and possesses quite a differ- 

 ent style of coloration from SjjilosonKi, thei'e are many important cha- 

 racters that warrant its separation from that genus. There are marked 

 differences in the relative size and form of the clypeus, and also of the 

 palpi. Though confounded with Spilosoma, by its narrower primaries, 

 with their very oblique outer edge, it is much nearer to R//phaafria, 

 and it should perhaps fall between the two genera. 



Leucarctia Acraea. 



pseiiderminea Peck ? 



Phalaena acria Smith, X. H. Lep. lus. Ga. p. 133. Tab. 67. (1797). 



* Xc'jKOi white, Aretia. 



