INJURING HICKORY LEAVES. 301 



Saunders (Can. Eutom., Feb. 1877, v. 9, p. 32-33) figures and describes the imago. 

 Orote (Can. Eutom., Sept. 1878, v. 10, p. 176) states that this species is double-brooded 

 in the Southern United States. 



49. The regal walnut caterpillar. 



Citheronia regalis Hhbner. 



Order Lepidoptera ; family Bombycid^. 



A spiny caterpillar 5 inches long, our largest species, green, with a red head and 

 tail, and stout, sharp, black and red spiues, and black and red feet; not spinning a 

 cocoon, but the larva enters the ground in September to transform to a chrysalis, 

 which in July changes to a very large bright orange-red moth, with the fore wings 

 pale olive spotted with yellow, the veins stained reddish, and the hind wings orange- 

 red. 



This is our largest caterpillar; it is harmless, though so formidable 

 in appearance, and easily recognized by its size and by the four long 

 horns on the segments just behind the head. It feeds on the black 

 walnut, butternut, hickory, persimmon, and sumach, and is very rare 

 north of New York, and is scarce in the Middle and Southern States. 

 In Georgia it is double-brooded. 



50. (Edemasia concinna (Abbot and Smith.) 



According to Abbot and Smith the caterpillar feeds on the honey- 

 locust ( Gleditschia triacanthos), apple, persimmon, and hickory, the whole 

 brood most commonly together. Its web was formed on the 28th of 

 May, and the fly came out June 12th. It likewise spins in the autumn 

 and comes out in the spring. It thus appears to be double-brooded in 

 the Southern States, but in the Northern States it is single-brooded, and 

 usually occurs on the apple, cherry, and plum trees in August and 

 September, stripping certain branches of their leaves. 



51. Datana angusii Grote and Robinson. 



I have found the caterpillars of this Datana on the pig-nut hickory 

 late in the summer at Providence. The body is very dark, and Abbot 

 and Smith in the last century noticed a black Datana larva on the hickory, 

 as did Harris (see Harris' Correspondence.) When at rest the head and 

 thoracic segment are thrown over the back, and the eighth segment 

 and those behind it are also held up at right angles to the middle of 

 the body, as usual in other species of the genus. 



Larva. — Head black, body very dark, with four linear greenish-yellow distinct 

 lines on each side of the body, with numerous long white hairs, some longer than 

 the body is thick, arising from minute black papillie. Thoracic legs black, but the 

 third pair Scotch-snuflf brown at the base, as are the abdominal legs, except the anal 

 pair. Length, 40™™. 



