9 



black and yellow striped caterpillar about two inches long - , with a black 

 head and the next segment yellow, from which the name of the insect is 

 derived. These larvae are gregarious creatures, and are always found 

 clustered thickly together on the limb where they are feeding. When 

 disturbed or alarmed they throw up their front and hind segments with a 

 jerk, and move them from side to side in a curiously threatening manner. 

 They may easily be destroyed by crushing them where they are gathered, 

 or by cutting off and burning the limb. If too high up to reach con- 

 veniently, they may be jarred off by rapping the branch with a pole and 

 then trampled under foot where they fall. The moth is pale brown in 

 color, with darker lines across the wings, and a conspicuous dark vel- 

 vety patch on the head and thorax. 



The Red-Humped Apple-Tree Caterpillar (CEdemasia concinna), 

 Figs. 12 and 13. This insect resembles the preceding species very much 

 in habits, stripping completely the foliage of the bough where it is feed- 

 ing and crowding together when at rest. Similar measures may be 

 adopted for its destruction. The caterpillar has a coral-red head and a 

 hump on the back of the fourth segment of the same color, whence its 

 name. The body is adorned with narrow, black, yellow and white lines 

 and rows of black prickles on the back and sides ; the hind segments taper 

 toward the tail and are held up when the insect is not crawling. 



Fig. 11. Datana Moth. 



Fig. 12. Moth of the Red-humped 

 Caterpillar. 



Fig. 13. The Red-humped Caterpillar. 



The Spring Cankerworm (Paleacrita vernata) and The Fall Can- 

 kerworm (Anisopteryx pometaria), Fig. 14. These two species resemble 

 each other so much that they may be considered together. The moths of 

 the former come out during the first warm days in spring; those of the 

 latter late in the autumn, sometimes after the first snow has fallen 



in 



