58 MONTANA EXPEEHMENT STATION Bui. 112 



MOTHS AND BUTTERFLIES (LEPIDOPTERA) 



The Imported Cabbage Worm {Plcris rapae Linn.). This cab- 

 bage worm was as plentiful as in previous years and attracted 

 considerable attention. Cabbage patches all over the State suffered 

 some loss from it. Wherever the remedies we have proposed have 

 been used, the insect has been controlled. 



Clothes Moths {Tinea sp.). Clothes moths were reported in 

 several instances as being harmful. Fumigation with hydrocyanic 

 acid gas was tried and was successful in controlling them. 



The Bud-Moth of Apple (Tmetoccra ocellana Schiff.). This 

 insect appeared in an unusual role on apples this year. The tiny 

 larvae fed on the fruit just before picking time, making holes and 

 scars on the surface. While the damage to each fruit did not amount 

 to much, it was enough to drop first-class fruit into the cull class 

 and cut down the value of the crop. 



The Mediterranean Meal Moth {Ephcstis kuelinieUa Zell.). The 

 Mediterranean meal moth was reported in corn meal in town, and 

 again in the feed bins of the poultry department at the Experiment 

 Station. The ground feed in the bins became so matted together 

 that it was difficult to get it out. This is an important pest in flour- 

 mills, warehouses and stores. 



The Polyphemus Moth {Tclca poly])lLeiniLs Cramer). The 

 cocoons of the polyphemus moth were collected at Huntley. There 

 is no record of any damage being done, but persons Avho find any of 

 the very large and showy moths often send them in. 



The Red-Humped Apple Caterpillar (SchizuTa concinna S & A). 

 This insect pest of the apple was reported from the Bitter Root 

 Valley but was doing no great amount of damage. It occasionally 

 eats oft" the foliage from a few small limbs. 



The Sugar-Beet Webworm {Loxoste^e sticticalis Linn.). In 

 late July and early August reports of damage being done by the 

 sugar-beet webworm were frequent. They were at first reported as 

 feeding on Russian thistle, but later fed on flax and sugar beets. 

 It seems clear that this injury was by the second brood of the insect. 



The Tent Caterpillar (Clissiocanipa cnnericana Fab.). Several 

 large nests of the tent caterpillar were noticed on apple trees in 

 various localities. They did not seem to be doing any extensive 

 damage but, as usual, were defoliating a few branches. 



