A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . Fio. 181).—The Larse Willow Saw-fly (Cimbex americana): a, willow leaves showing egK-blisters from above and below; b, twiff showinj? girdliugs; c, egg; d, newly hatched larva;e, e, full-grown larvie; /; cocoon; g, cocoon cut open, with pupa; b, pupa, side view; ;,male fly; J, saw of female detached, side view; k, tip of do.; c, d, j, k, enlarged, the restnatu
A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . Fio. 181).—The Larse Willow Saw-fly (Cimbex americana): a, willow leaves showing egK-blisters from above and below; b, twiff showinj? girdliugs; c, egg; d, newly hatched larva;e, e, full-grown larvie; /; cocoon; g, cocoon cut open, with pupa; b, pupa, side view; ;,male fly; J, saw of female detached, side view; k, tip of do.; c, d, j, k, enlarged, the restnatural size.—[After Uiley.] The Gall flies belonging to the family Cynipid^, are all rather smallsized insects that can be described as creatures which sting and causeunnatural growths or galls to form upon different plants in which theirlarvaa live. The family is rather an extensive one and contains a large TO THE STUDY OF ENTOMOLOGY. 97 variety of forms, some of which are wingless. A few species are dimor- phic, i. e., they occur in two forms.(Fig. 189 and 190) will give the reader. fly: a, eggs; b, c, worms;e, cocoon; /, fly.—[After The accompanying illustrationsa fair idea as to the apearance ofthese insects and their galls. Astudy of the galls and their oc-cupants belonging to thisfamily is an interesting species of the flies pro-duces its own charasteristicgall. The various kinds of oakseem to be most subject to theirattacks; but a number of otherplants are also chosen as hostplants by some of the repre-sentatives of the family. Theroses are among the plants thatare most molested by insects are best con-trolled by gathering and de-stroying the galls. They arealso kept in check by represent-atives of the families Chaloid-ID^ and Proototrypid^ men-tioned beyond. The very extensive familyICHNEUMONiD^ of parasites isone of great importance sincethe larvae of these insects live Fig. 187.—Locust Sa, tail of the same;Comstock.] within the bodies of cater
Size: 1329px × 1879px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1894
