230 LEPIDOPTERA OF NORTH AMERICA. 



angle, where there are a few sagittate olive spots. Body beneath 

 yellow, with some red spots ; legs red. Expands five inches. 



Larva green, with pale blue across each segment ; on the side 

 of each segment a large bluish spot nearly square ; head and feet 

 orange. On the first segment two long curved spines ; on. the 

 second, four, and an equal number on the third. They are yellow, 

 except at the tip, and are beset with small sharp points. On each 

 of the other segments there are six shorter spines, except the ele- 

 venth, on which there are seven, the longest one in the middle, and 

 on the last segment there are eleven. Length from five to six 

 inches. 



Feeds on black walnut (Juglans), persimmon (Diospyros vir- 

 giniana}. 



Chrysalis short and thick, with a small mucro at the posterior 

 part and edges of the segments without spines. 



United States. 



2. G. imperialis Drury. Imperatoria Sm. Abb. Figured in Sin. Abb. II, 

 pi. 55. Jardine's Nat. Lib. XXXVII, pi. 17. 



Antennas and head yellow or reddish-brown ; thorax brown in 

 front, yellow on top, purple on the sides ; abdomen yellow, shaded 

 with purple. 



Primaries yellow, sprinkled with purple, a large purple spot at 

 the base, a double round spot, with a yellow centre on the disk, a 

 sinuous purple band, commencing at the tip and crossing the wing, 

 a broad purple patch on the external border. 



Secondaries of the same color, a smaller purple cloud at the 

 base, a purple band with a round spot, having a yellow centre 

 resting on it. Under side paler, the sprinkled dots not so nume- 

 rous, and the bands indistinct. Expands four and a half inches. 



Larva varies in color ; sometimes tawny, again orange and 

 tawny, occasionally green. It has two short rugose horns on each 

 of the second and third segments, and some minute sharp points 

 on the others, crowned with tufts of long rigid hairs. There is a 

 small yellow spot, surrounded with a black ring, on the sides of all 

 the segments except the first three. 



Feeds on the plane-tree (Platanus occidentalis) , the oak (Quer- 

 cus~), sweet gum (Liquidambar}, and pine (Pimis). 



Chrysalis narrow, elongated, tail bifid at the extremity, edges 

 of the segments armed with a regular series of spines. 



United States. 



