THE CANADIAN ENTOMOLOGIST. 135 



being as wide as the intervening spaces, except the dorsal space which is 

 the widest. Body beneath concolorous to the above, with three longitu- 

 dinal stripes, and the intervening spaces much broader. On each of the 

 4, 5, 10 and 11 segments two reddish brown patches. Thoracic feet and 

 claspers of the abdominal legs jet black, with their bases reddish brown. 

 The body is also sparsely covered with sordid white hairs. Length about 

 30 mm. 



Mature Larva. — The cervical shield now becomes orange yellow, 

 and the stripes creamy white. Otherwise as in the previous stage. 

 Length 55 mm. 



Food Plants. — Oak ( Quercus), chestnut ( Castania), hickory ( Curyu). 



Datana Angusii, Gr. & Rob. 



Head and cervical shield jet black, shiny. Body black, with four very 

 narrow, pale yellow stripes along each side, all being much narrower than 

 the intervening. On the underside three pale yellow stripes. One along 

 the middle, which is the broadest, and one on each side being broken by 

 the legs; the intervening spaces are much wider than those above. 

 Thoracic feet black. Abdominal legs reddish, with the extremities jet 

 black. On the 4, 5, 10 and n segments two reddish patches. Body 

 with sparsely distributed sordid white hairs. Length 55 mm. 



Food Plants. — Hickory (Carya) and walnut (Juglans). 



The following synoptical table may serve in determining the larva? of 

 the genus Datana. The larvae of D. robust a, Strk., and D. major, G. 

 & R., are unknown to science: — 



STRIPES NARROWER THAN THE INTERVENING SPACES. 



Body black, stripes sulphur yellow Ministra. 



Body black, stripes citron yellow, confluent posteriorly Drexelii. 



Body black, stripes very fine, pale yellow Angusii. 



Body black, stripes absent Integerrima. 



STRIPES AS WIDE OR WIDER THAN THE INTERVENING SPACES. 



Body black or red, stripes bright lemon yellow Perspicua. 



Body black, stripes creamy white Contractu. 



Body black, stripes yellowish, head and anal plates red Floridana. 



