Principal household insects of the United States . its larva, however, appeared many yearsearlier, one of these, byThomas Moufet, datingback to the year it is in the larvalstage that this insect isbest lyiown, the nameu yellow meal - wormis suggested to distin-guish it from the con-generic species, whichis much darker in larva (see fig. 54, a)is cylindrical, long, andslender, attaining alength of upward of aninch and being abouteight times as long-as broad. It is waxenin appearance, much resembling a wireworm. In color it is yellow,shading to darker ochreous toward each, end
Principal household insects of the United States . its larva, however, appeared many yearsearlier, one of these, byThomas Moufet, datingback to the year it is in the larvalstage that this insect isbest lyiown, the nameu yellow meal - wormis suggested to distin-guish it from the con-generic species, whichis much darker in larva (see fig. 54, a)is cylindrical, long, andslender, attaining alength of upward of aninch and being abouteight times as long-as broad. It is waxenin appearance, much resembling a wireworm. In color it is yellow,shading to darker ochreous toward each, end and near the articulationof each joint. The anal extremity terminates in two minute spines,not in a single point, as figured and described by Westwood and otherwriters. The pupa (b) is white, and the adult insect, as will readily beseen by reference to the illustration, (c) resembles on a large scale one ofthe flour beetles. It is considerably over half an inch long, somewhatflattened, shining, and nearly black. An enlarged antenna is shownat a %n^c^^ Fig. 54.—Tenebrio molitor: a, larva; b, pupa; c, female beetle; </,egg, with, surrounding ease; e, antenna—a, b,c,d, about twicenatural size; e, more enlarged (original). INSECTS AFFECTING CEREALS, ET< 117 The eggs are white, bean-shaped, and about one-twentieth of aninch long, and arc deposited by the parenl beetle in the meal or othersubstance which is to serve as the food of the future larva, singly orin groups, as high as fourteen <»r sixteen being laid in a single are adhesive when fust extruded and become attached to anysurface upon which they are laid, and also take <m ;i coating of par tides of meal or other material. In the illustrati al /. an egg is shown in profile with its covering of meal. The beetles begin to appear in the latitude of Washington in Apriland May, occurring most abundantly in the latter month and in June,when they run and fly actively aboul in search of their mates and of
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsectp, bookyear1896
