Datana perspicua G. & R., the sumac datana, feeds on sumac 
throughout most of eastern United States and in southern Can- 
ada. Full-grown larvae are moderately hairy and about 50 mm. 
long. The head is dark reddish to black, the cervical shield red- 
dish brown, and the anal plate, blackish. The body is deep straw 
or lemon yellow, with 11 longitudinal, dark reddish-brown to 
blackish stripes. 
Datana contracta Wlkr. feeds cn oak and sycamore in eastern 
United States west to the Lake States and Arkansas. Full-grown 
larvae are about 50 mm. long and clothed with long, white hairs. 
The body is black with 11 longitudinal, yellowish-white stripes. 
Datana drexeli Hy. Edw. feeds on basswood, walnut, sassafras, 
and witch-hazel from the Atlantic Coast to Ohio. Full-grown 
larvae are moderately hairy and about 50 mm. long. The head and 
body are black; the cervical shield and front of the thorax honey 
yellow; and the body bears 11 longitudinal stripes. 
The walnut caterpillar, Datana integerrima G. & R., occurs 
commonly in southern Ontario and throughout eastern United 
States where it feeds on a wide variety of deciduous trees, pre- 
ferably walnut, butternut, pecan, and hickory. Adults are stout- 
bodied, have wingspreads of about 50 mm., and are clothed with 
dull brown to chestnut brown scales. The forewings are brownish 
and crossed by dark, irregular lines. Full-grown larvae are up to 
50 mm. long. The body is black with longitudinal, yellowish 
stripes and is covered with long white, or dirty gray hairs. 
Adults are present during the spring and summer. Egg laying 
begins in early June, the eggs being deposited in masses on the 
undersides of leaves. The larvae feed in colonies until almost full 
grown (fig. 117). They are often found in masses on the trunk 
COURTESY ILL. NAT. HIST. SURV. 
FIGURE 117.—Colony of larvae of the walnut caterpillar, Datan integerrima. 
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