4. MONTANA EXPERIMENT STATION Bui. 133 



THE TRUE BUGS, PLANT LICE, ETC. (HEMIPTERA). 



Box Elder Bug (Leptocoris trivittatus Say.). This insect ordin- 

 arily confines itself to the box elder but was reported to have 

 injured fruit in the vicinity of Joliet. 



Cottony Maple Leaf-Scale {Pulvinaria , acerioola Walsh ^ 

 Riley). This louse has been known to be present on shade trees 

 in the cities of Missoula and Kalispell for some years but during the 

 present season there was a great increase and injury was reported. 



Bedbugs {Cimex lectulariiis Linn.). More than the normal 

 number of requests for advice on "how to rid the house of bugs," 

 came to us this season. The cyanide fumigation method, although 

 it necessitates some danger and expense, is recommended and ex- 

 cellent results have been obtained. 



Chinch Bug (Blissus lencopterus Say.). The country south of 

 Glasgow where chinch bugs were abundant in 1911 was examined 

 thoroughly again this season but no evidence of a reoccurrence of 

 the pest could be found. 



Cabbage Louse {Aphis brassicae Linn.). The cabbage louse 

 was observed to be much more abundant than for some time past. 

 Inquiries were numerous as to how this insect could be destroyed. 



False Chinch Bug {Jfysius ericae Schill). On account of being 

 mistaken for the real chinch bug (BUssiis lencopterus Say.) this 

 insect causes alarm wherever found. Although it is a bad pest in 

 gardens, in no way does it approach its eastern relative in the amount 

 of destruction which it can cause. 



Oyster Shell Bark Louse {Lepidosaphes jihni Linn.). The 

 oyster shell scale was present in less than normal numbers in the 

 Bitter Root Valley in 1919. 



Sugar-Beet Root-Louse {Pemphigus hetae Doane). This was 

 more abundant than it has been since 1916 and damage was done 

 in the beet-growing districts of the state. 



MOTHS AND BUTTERFLIES (LEPIDOPTERA). 



Imported Cabbage Worm (Pontia rapae Linn.). This caused 

 an increased loss to the cabbage crop. Many calls for information 

 on control methods were received and it is safe to say that this 

 insect has not been so plentiful for several years past. 



Corn Ear Worm {Hcliotlns obsoJeta Fab.). This insect is becom- 

 ing more important among the pests of eastern Montana and this 



