. Eastern forest insects. Forest insects. parasitize various native and introduced species of eastern forest insects. More than 125 species have been recorded attacking lepi- dopterous larvae in this country (638, 639). A few of the more important introduced species are discussed here. CompsUura concinnata (Meigen) (fig. 172) was imported against the gypsy and brown-tail moths in the early days of this century. It is now widely distributed throughout most of the Northeast and in southeastern Canada where it attacks at least 200 species of Lepidoptera. Parasitization of the gypsy moth averages
. Eastern forest insects. Forest insects. parasitize various native and introduced species of eastern forest insects. More than 125 species have been recorded attacking lepi- dopterous larvae in this country (638, 639). A few of the more important introduced species are discussed here. CompsUura concinnata (Meigen) (fig. 172) was imported against the gypsy and brown-tail moths in the early days of this century. It is now widely distributed throughout most of the Northeast and in southeastern Canada where it attacks at least 200 species of Lepidoptera. Parasitization of the gypsy moth averages from 10 to 50 percent in much of the infested area. Even higher percentages are recorded in brown-tail and satin moth infestations {205, 177, 751, 12b). Blepharipa scutellata () (fig. 173), a parasite of the gypsy moth, was imported and became established by 1911. In most of the areas where it occurs, it parasitizes from 5 to 25 percent of the gypsy moth population. As far as known, it confines its attack to the gypsy moth in this country, whereas in Europe it has several lepidopterous hosts. Burgess and Crossman (12U) discussed its life history and habits. Parasetigena agilis () and Exorista larvarum (L.) were imported against the gypsy moth from 1924 to 1933. P. agilis, a single brooded species, is probably the most important parasite of the nun moth in Europe. E. larvarum, a multi-brooded species, attacks about 45 different hosts in Europe. Both species are now important parasites of the gypsy moth throughout the generally infested area in the United States. E. larvarum is also a parasite of the satin moth and brown-tail moth in this country. Two species. Townsendiellomyia nidicola (Tns.) and Carcelia laxif rens Vill., were imported against the brown-tail moth during. r \ F-519565 Figure 173.—Adult of Blepharipa scutellata, a parasite of the gypsy moth and other defoliators. F-519564 Figure 172.—Adult and puparium of Comp- sUura concinnata, a parasite of the gy
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
