172 



MONTANA EXPERIMENT STATION. 



the medium of crated cherries shipped from one locality to another. 

 It hibernates as an adult and may be distributed in this stage. 



Its presence may be detected by the characteristic cresentic 

 slits that it makes on the young fruits that it attacks and by the grub 

 in the fruit. However, there are other insects that feed in stone 

 fruits. 



This is a native American insect. It is said to occur near Stev- 

 ensville, Montana, and in Yellowstone County. 



TENT CATERPILLARS. 



There are about five species of tent caterpillars that are liable to 

 be found in Montana. We have already had a few complaints of 

 these insects and the writer saw a nest of what was probably the 

 common eastern species, {Clisiocampa amcricana) in Missoula county. 

 Within certain limits the caterpillars of all these species appear alike 

 and the accompanying illustration will give a reliable idea of the 

 general appearance. 



The winter is passed in the e^g stage. The tgg clusters shown in 

 the accompanying figure are liable to occur on any bill of nurstry 



Fig. 19. Clisiocampa americana: top view of full grown caterpillar. (Lowe, 

 Bulletin 152, N. Y. Agl. Exp. Sta.) 



