98 ZYG^NIDiE AND BOMBYCID^ 



BOMBYCIDJE. 

 ARCTIINJE. 

 Genus LEUCARCTIA. Packard. 



" Front thickly covered with short hairs. Antennae well pectinated, 

 the pectinations in the $ being as long as the joints of the antennas 

 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 setae. 

 Maxillae stout and well developed. Palpi depressed, hardly surpassing 

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

 the tip of the basal joint surpassing the tip of the second. 



"Thorax and abdomen stouter than usual. The fore wings are 

 convex towards the unusually produced apex ; outer margin very ob- 

 lique, 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 $ . 



" While this genus is of much larger size, and possesses quite a dif- 

 fei'ent style of coloration from Spilosoma, there are many important 

 characters that warrant its separation from that genus. There are 

 marked differences in the relative size and Ibrm 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 

 Hypluvitria, and it should, perhaps, fall between the two genera. 



Pack., Proc. Ent. Soc. Phil, vol. 3, p. 124. 



