22 



MONTANA BULLETIN 200 



( !ommon Name 



Laurel willow aphis 

 Brown willow aphis 

 Plant lice 



Leaf-folding sawfly 

 Chrysomelid beetles 



WILLOWS 



Scientific Name 



Melanoanthermm Smithiae Movell 



Sp. undetermined 



Aphididae 



Pontania bozemani Cooley 

 Lina scripta Fab. 



Since the use of various trees and shrubs for shelter belts in Montana was 

 begun, more attention has been attracted by insect damage. While more complaints 

 have been coming in, no unusual insects have been reported. Leaf-cutter bees have 

 become unusually abundant and have done considerable damage in the north-central 

 part of the State by cutting pieces from the leaves with which to build their nests. 



Leaf-cutter bees 



a it tt 



Cottony maple scale 



tt tt 



Thrips 

 Red spider 

 Leafhoppers 



VINES 



Megachilidae 



Pulvinaria vitis Linn. 



Sp. undetermined 

 Tetranychus telarius Linn. 

 Cicadellidae 



Here again the damage of the leaf-cutter bee is reported as serious. 



WEEDS 



Cutworms 



tt 



False chinch bug 

 Dandelion gall 



Euxoa tristicula 

 it tt 



Xysius ericae Schill. 

 Cynipidae 



Sugar-beet webworm Loxostege sticticalis Linn. 



Pale western cutworm 

 Painted lady butterfly 



Porozagrotis orthogonia Morr. 

 Vanessa car dux Linn. 



All are interested when insects are found destroying noxious weeds. Conse- 

 quently we have received and identified many insects that are in this way more or 



