SEVENTH ANNUM. REPORT STATE ENTOMOLOGIST. 53 



scasdiis s])<.'nt in Montana hy \hv w riUT, tlic -^innnier of 1909 was 

 the first oiu' in which lussock moths were coniinon in the state, 

 as iiKhcatcd by spvcinK'ns sent in by corresjjondents. This very 

 striking- s])ccies was received se\eral times in the eg'g' stage from 

 the western ])art of the state. The writer had sei'n it in Montana 

 orchards a few tinu's ])re\ i< luslw 



The Buffalo tree-hopper {('rrcsa hiiha/iis l'"al)r.) — Twigs of 

 ajjple showing the characteristic markings ])rodiiced by this 

 insect in inserting its eggs under the bark have been received with 

 fair frequency at the Experiment Station. Jt is more common in 

 the eastern part of the state. 



Blister mite on apple ( KriopJn/es j)j/Ti Xal.) — State Horticultural 

 lns])ect()r M . L. Dean has called our attention to the occurrence 

 of this ])est in certain orchards near A'ictor during the past season, 

 it (X'curs at that place both on apple and mountain ash. 



The onion maggot (/'Jiorhia cejxii-uin Meigen.) — Maggots in 

 voting onions sent in from ( ireat I'^alls and reared to the adult con- 

 dition are of this species. Onions are not an important crop in 

 Montana and this inspect has not attracted much attention. 



The Bronze apple tree borer (Afa^dalis aenescens LeC.) — This 

 species appears to be well established in the Bitter Root valley but 

 has not been very injurious. It was first found in Montana several 

 years ago on the orchard of Mr. Bandman near Missoula. It has 

 since been found at ])oints in the Bitter Root valley. 



Scale on Mountain Ash {Aspidiotus sp.) — We have specimens 

 of this insect fomid on mountain ash from Billings and Missoula. 

 In both cities it became very abundant on individual trees. It has 

 not spread to apple trees. 



