Principal household insects of the United States . theless, when confinedin the warm season of theyear to a small receptacle,not at all tenacious of results from this fact, forexample, that it is almostimpossible to ascertain thelength of the life of the housefly in the adult .June 26 a small quantityof fresh horse manure wasexposed in a fly-in tested roomfor a few minutes. The tlies deposited theireggs freely and immediately in this At thesame time the specimens were confined glass dish inches in diam-eter and 3 inches in height. In this dish was a la
Principal household insects of the United States . theless, when confinedin the warm season of theyear to a small receptacle,not at all tenacious of results from this fact, forexample, that it is almostimpossible to ascertain thelength of the life of the housefly in the adult .June 26 a small quantityof fresh horse manure wasexposed in a fly-in tested roomfor a few minutes. The tlies deposited theireggs freely and immediately in this At thesame time the specimens were confined glass dish inches in diam-eter and 3 inches in height. In this dish was a layer of moist sand, cov-ered with a layer of fresh horse manure, and the vessel was covered witha piece of gauze. On the following morning all the tlies. twenty-four innumber, were dead, and not a single egg had been laid. A fresh sup-ply of tlies w;is introduced into the same vessel, and the next morning allwere dead and no eggs had been laid. The cover was now removed fromthis vessel and the latter placed in a glass cylinder 1 1 inches high, the. PlO. 14.—Musca domestica: a, fall-grown larva: h, one ofits anterior spiracles; c, side view of head; (/, hind endof body Bhowing anal spiracles; . W.( oqaiUett. 46 PRINCIPAL HOUSEHOLD INSECTS. top of which vras covered with gauze, and twenty flies was at noon ; by 1 oclock in the afternoon no eggs could be found,but at J> oclock the next morning two clusters of eggshells, one clustercontaining 2G and the other 45 eggs, were found. The eggs had beendeposited in small cavities between the sides of the vessel and themanure, at a depth of about a quarter of an inch below the surface,but were not arranged in any regular order. Afterwards several black-berries, cherries, and partly decayed apples were placed in this vessel,and more Hies were introduced. xV single e^^ was found the next dayon the
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsectp, bookyear1896
