106 PROMINENTS. 
Abdomen gray, and tuft tipped with deep brown. Expanse, 
male, 36-40 mm.; female, 50 mm. The moth is illustrated 
in Fig. 103. 
THE YELLOW-NECKED APPLE TREE CATERPILLAR. 
(Datana ministra Drury). 
This insect is not very common in our state, but is evi- 
dently on the increase in nurseries and orchards, and wher- 
ever found is quite destructive. It has found a home in some 
of our nurseries, where it can seriously injure the young 
trees, especially as the caterpillars are gregarious and 
thoroughly strip the infested plants of all foliage. When 
young they eat only the under side and softer part of the 
leaves, leaving veins and upper side uutouched, but as they 
grow older and stronger the entire leaf, with the exception 
of the stem, is eaten. When full grown, which requires from 
Fig. 104.—Datana ministra Drury; a.caterpillar; b, adult; 
c,egys; d,eggenlarged. After Riley. 
five to six weeks, they measure about two inches in length. 
They have a large and black head; upon the next segment 
the cervical-shield, sometimes called the neck, is of a dull 
orange color. Upon the back of the caterpillar we find a 
black stripe, and on each side are three stripes of black, 
alternating with four yellow stripes. White hairs, which 
are very long and solt, thinly clothe the body. As already 
mentioned the caterpillars are always found clustered to- 
