Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 82 AN ECONOMIC ENTOMOLOGY, Fig. 47. convenient crevice, and very soon thereafter the young issue. Modifications of this habit occur, and in some cases the eggs act- ually hatch within the body of the mother, who thus becomes viviparous. I am not aware that roaches ever become injurious to growing crops in our country ; but two species are certainly great nuisances in houses,—the *'Croton bug,' Phyllo- dromia germanica, and the ' black beetle,' Periplaneta orientalis. Both are introduced
Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 82 AN ECONOMIC ENTOMOLOGY, Fig. 47. convenient crevice, and very soon thereafter the young issue. Modifications of this habit occur, and in some cases the eggs act- ually hatch within the body of the mother, who thus becomes viviparous. I am not aware that roaches ever become injurious to growing crops in our country ; but two species are certainly great nuisances in houses,—the *'Croton bug,' Phyllo- dromia germanica, and the ' black beetle,' Periplaneta orientalis. Both are introduced and almost cosmopolitan forms. The former is small, averaging about half an inch in length, and is winged in both sexes. The latter is larger, varying between three- fourths and one and one-fourth inches, with short wings in the male and mere rudiments in the female. The most satisfactory way of dealing with these insects is by means of a phosphorus paste, spread upon bits of soft bread and placed near their haunts, all other food particles being care- fully put out of reach. A short period of such treatment will usually prove effective. Almost as good is a mixture of equal Forficula tczniata, male and female. Fig. 48.
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