. Insect life; an introduction to nature study and a guide for teachers, students and others interested in out-of-door life. Entomology; Nature study. 238 INSECT LIFE. 3. Prepare a breeding cage by placing a sod of growing grass in it, put several living male crick- ets in it, and set the cage where the insects can be watched. After the insects have become used to the cage they will chirp, and the pupils can determine how it is done. 4. Kill a pair of crickets by placing them in a cyanide bottle and then study their wings. How do the front wings of the male differ from those of the female? Mak
. Insect life; an introduction to nature study and a guide for teachers, students and others interested in out-of-door life. Entomology; Nature study. 238 INSECT LIFE. 3. Prepare a breeding cage by placing a sod of growing grass in it, put several living male crick- ets in it, and set the cage where the insects can be watched. After the insects have become used to the cage they will chirp, and the pupils can determine how it is done. 4. Kill a pair of crickets by placing them in a cyanide bottle and then study their wings. How do the front wings of the male differ from those of the female? Make drawings showing the differ- ences. 5. If you have the use of a micro- scope observe that the principal vein which extends diag- onally across the base of the fore wing of the male (Fig. 205, a) is furnished'on the lower side of the wing with ridges like those of a file (Fig. 205, b); and that on the inner margin of this wing, a short distance toward the base from the end of the principal vein, there is a hardened portion, which may be called the scraper (Fig. 205, c). 6. Watch a cricket while chirping and determine how the files and scrapers of the two fore wings are used. 7. Write an account of the way in which crickets Fig. 205,—Musical organs of a male Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Comstock, John Henry, 1849-1931; Comstock, Anna Botsford, 1854-1930. New York, D. Appleton and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectentomol, bookyear1901
