TWENTY-FIFTH KEPORT OF 8TATE ENTOMOLOGIST 37 



During the summer of 1934 two colonies of Ascogaster carpocap- 

 sae Vier., small parasite of codling moth larvae, were lil)erated, one 

 colony of about 1500 in the Orchard Homes section close to Missoula 

 and another colony of about the same size in an orchard on Rattle- 

 snake Creek, also near Missoula. During 1935 colonies will be released 

 in the vicinity of Kalispell. This is one of the most effective parasites 

 of "apple worms" and it is hoped that it will become well established 

 in Montana. Attempts to recover the parasite as a check on the suc- 

 cess of the introductions will be made in 1935. The Bureau of En- 

 tomology, United States Department of Agriculture, raises these 

 small enemies of the codling moth. In 1934, 40,000 of them were 

 shipped to various fruit districts. 



INSECTS OF SHADE TREES AND ORNAMENTALS 

 The spruce gall-aphid, Adelgcs coukiji Gillette, has been very 

 abundant in western Montana on Colorado blue spruce during the 

 past two seasons. The cottonwood leaf beetles, Lina scripta Fabr., 

 and Chrysomela lapponica (interrupta) Fab., the cottonwood leaf 

 miner, Zeugophora scutellaris Suffr., and th.e rough plant bug, 

 Brachymena arhoreo Say, were very destructive to cottonwood during 

 both 1933 and 1934. 



The Virginia creeper leaf hopper, Erythronenra ziczac Walsh, 

 w^hich for years has been working westward up the Yellowstone River, 

 crossed the divide into Gallatin Valley in 1932 or 1933 and since 

 1933 has become extremelv destructive to vines in Bozeman. 



