. Annual report of the State Entomologist of Montana . ^ Leaf-Roller 176 i The Cherry Fruit Fly i / / THE ELM HEALY-BUG. Phciiacocciis dcarjicssi King. While searching for cocoons of the codling moth under scalesof bark of apple trees in Missoula in January, 1902, numerous cot-tony masses were found secreted under the scales and not visibleexcept when the scales are picked ofif. These cottony masses con-tained the eggs and adults of a mealy-bug which I have referred toriicuacocciis dcanicssi King. Specimens were sent to Prof. A. Cockered, the American authority on these insects, and helep
. Annual report of the State Entomologist of Montana . ^ Leaf-Roller 176 i The Cherry Fruit Fly i / / THE ELM HEALY-BUG. Phciiacocciis dcarjicssi King. While searching for cocoons of the codling moth under scalesof bark of apple trees in Missoula in January, 1902, numerous cot-tony masses were found secreted under the scales and not visibleexcept when the scales are picked ofif. These cottony masses con-tained the eggs and adults of a mealy-bug which I have referred toriicuacocciis dcanicssi King. Specimens were sent to Prof. A. Cockered, the American authority on these insects, and heleplied that it appeared to be this species and on comparing it withthe descriptions his conclusion was found to be correct. On April 30th in the same vicinity in ^ylissoula. numerous mealy-bugs, which later were found to be the same species, were foundclosely packed on elm buds which at that date were greatly swollenand about to open. See Fig. i, i. During the remainder of the. Fig. 1. The Elm Mealy Bug: 1, Mealy bugs at bases of buds of elm inspring of the year, natural size; 2. adult female from bekw, enlarged; 3,leg of female, enlarged: 4, antenna of female, enlarged; 5, newly hatched lar-va, enlarged; 6, egg, enlarged. 128 MONTANA EXPERIMENT STATION. season of 1902 and in 1903 the species was commonly seen both onthe apple and the elm at Missoula. On making inquiry I learned from ]\Ir. C. F. Dallman, proprietorof the Missoula nursery that this insect has at times been so abun-dant on the limbs and trunks of elms as to cause the leaves towither. From the foregoing it appears that while the insect wasoriginally found on the apple at Missoula it is more particularly apest of the elm and that on that desirable shade tree it is capable oibecoming a serious pest. So far as the notes in thisofifice show, we have, beside this mealy-bug, onlv one seriouspest of elms in Montana. This is the aphis which lives on theleaves causing them to curl and become deformed. Hannualreportofstentno0
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