. Some insects injurious to garden and orchard crops : a series of articles dealing with insects of this class. more particularly by the lengthening of the wing-pads—two changes which produce an increased semblance to the mature hairiness of the legs and antenme which was so pronounced in thefirst stage has gradually become less and less evident with each suc-cessive molt until the hairs now. although plentiful, are little morethan fine short bristles. Length when first molted. 9 or 10mm, justtwice as long as wide. BRIEF DESCRIPTION OE THE ADTLT. To complete our knowledge of the differ
. Some insects injurious to garden and orchard crops : a series of articles dealing with insects of this class. more particularly by the lengthening of the wing-pads—two changes which produce an increased semblance to the mature hairiness of the legs and antenme which was so pronounced in thefirst stage has gradually become less and less evident with each suc-cessive molt until the hairs now. although plentiful, are little morethan fine short bristles. Length when first molted. 9 or 10mm, justtwice as long as wide. BRIEF DESCRIPTION OE THE ADTLT. To complete our knowledge of the different stages of this species theaccompanying illustration of the adult is added. Figure 5. a represents a female bug. about twice the naturalsize. It measures a little less thanthree fourths ot an inch (14tol6mra)inlength, is dirty dark brown above andmottled yellowish beneath. The hau-stellum. seen in the profile of the headand thorax (&), passes when at restunder the body. The terminal seg-ments of the abdomen of the sexes areshown at c and d. the former repre-senting the male, the latter the THE PERIODS OE THE LIEE CYCLE. Fig. 5.—Anasa tristisj a. mature female: i, sideview of Lead, showing hanstelToni: c, abdom-inal segments of male: d. same of female; The Carrying of this Species througha. twice natural size: 6, c. d, slightly more al] ftg sTageS in the rather ClOSC COn- enlarged (original i. finement of small rearing jars gavevariable results in the periods. Only two of these, the egg and the firststage of the nymph, were at all constant for the same temperature. The egg period was found to vary from eight to thirteen days, thisperiod depending as do other periods on the exposure to heat or cold,dryness, or humidity. The later periods were also influenced perhapsby the food supply. The usual period of the egg is between nine andten days. The first nymph stage requires a period of three days, or a little less;the second was passed in eight and nine days: the thi
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherwashingtondcusdept
