Show insect conquerors A recent bulletin of the department of agriculture points out the fact that within the past 15 years there has been a complete change in tho chief insect foe of the cotton plant previous to 1881 the cotton worm was not only the principal but almost the eole insect dreaded on the cotton plantations since that year the cotton worm has gradually disappeared and a bev nemy to the cotton plant the bollworm has taken its place such revolutions in the insect world not infrequently occur and sometimes they tako on the appearance of actual conquests effected by one species over others in the sandwich islands for instance a species 0 ant introduced from abroad Is driving out all other insects the only dative species that seems able to baand it being the earwig |