26 MONTANA EXPERIMENT STATION 



their presence in such large numbers forecast a brood of injurious 

 caterpillars but such was not the case. This species is not known 

 to be injurious to plants of value. 



Luna Moth {Tropaea luna Linn.)- — The County Agent of 

 Richland County reported that the larvae of this beautiful moth 

 stripped the foliage from the box-elder trees. 



PLIES (DIPTERA) 



Wheat Stem Maggots. — Early in the spring numerous com- 

 plaints were received fr<>m grain growers in southern and eastern 

 Montana, stating that a small, white maggot was destroying both 

 winter and spring wheat by boring through the central stem. An 

 investigation showed that two species of maggots, hitherto unknown 

 in Montana, were doing the damage. 



Onion Maggot (PJwrbia ceparuT)v Meade). — Like the cabbage 

 maggot, this insect is becoming more abundant and destructive each 

 year. 



Cabbage Maggot (Phorhia brassicae Boche). — Each year the 

 cabbage maggot becomes more troublesome to gardeners, especially 

 in the northern parts of the State. Turnips, rutabagas and radishes 

 are also attacked. 



Nose Fly {Gastropldhis liaeinorrlioidalis Linn.). — The nose fly 

 has now spread throughout the State and is a constant source of 

 irritation to horses during the hot summer months. 



Currant Fruit Fly {^Epoclira canadensis Loew. ). — Owing to the 

 total failure of the currant crop in many parts of the State, fewer 

 inquiries than usual were received concerning this pest of the cur- 

 rant and gooseberry. 



Mosquitoes (Culicidae). — Several requests for aid in mosquito 

 control campaigns were received but. because of lack of funds and 

 the pressure of other work, no help could be gi\en. 



THE BEETLES (COLEOPTERA) 

 Pea Weevil (Briicluis phi Linn.). — It is now definitely estab- 

 lished that the pea weevil can breed rapidly in ^Montana. Weevil- 

 infested peas planted by a farmer in the Yellowstone A'alley yielded 

 a badlv infested crop last year and again this year. It is to be 

 regretted that this enemy of the seed pea industry has now became 

 estal)lished within the State. 



