The black fly of citrus and other subtropical plants . eceding stage (and often stages)remains attached to or entangled in the spines of the middle part ofthe dorsum. The convexity of the individuals becomes pronouncedand the insect is distinctly ovate in °—20 3 34 BULLETIN 885, TJ. S. DEPARTMENT OF AGRICULTURE. In this instar (PL VIII, B) sexes can be distinguished with cer-tainty for the first time in the developmental stages, the males beingat least one-third smaller than the females. The only complicationin distinguishing the sexes seems to be between males and undersizedfema
The black fly of citrus and other subtropical plants . eceding stage (and often stages)remains attached to or entangled in the spines of the middle part ofthe dorsum. The convexity of the individuals becomes pronouncedand the insect is distinctly ovate in °—20 3 34 BULLETIN 885, TJ. S. DEPARTMENT OF AGRICULTURE. In this instar (PL VIII, B) sexes can be distinguished with cer-tainty for the first time in the developmental stages, the males beingat least one-third smaller than the females. The only complicationin distinguishing the sexes seems to be between males and undersizedfemales, although the latter are somewhat larger than the former. The duration of the third larval instar is from 6 to 20 days, althoughout of doors the majority of individuals molt a third time betweenthe eighth and fourteenth days after the second molt. No color change has been observed in the third larval instar indi-viduals preceding the third molt except that the dorsal hemispherical Dorsal View Lateral View Time 8 Lateral ViewTime 9:18 Dorsal View Time 9: Doreal View Time 9:26
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Keywords: ., bookcentury1900, bookdecade1920, bookidblackflyofci, bookyear1920
