The black fly of citrus and other subtropical plants . The Black Fly. A, Larva, first instar; B, larva, second instar; C, larva, third instar; D, pupa case; E, vasiforniorifice of pupa case; F, margin of pupa case. Bui. 885, U. S. Dept. of Agriculture. The Black Fly. A, Egg, -with enlarged view of polygonal markings of egg; B, pupal spine immediately aftermolting; C, same, showing variation in outersheath; D, pupal spine just before changingcolor; E, male genitalia: F, antenna of female; G, distal portion of segment in in the maleantenna; H, distal portion of segment in in the female antenna;
The black fly of citrus and other subtropical plants . The Black Fly. A, Larva, first instar; B, larva, second instar; C, larva, third instar; D, pupa case; E, vasiforniorifice of pupa case; F, margin of pupa case. Bui. 885, U. S. Dept. of Agriculture. The Black Fly. A, Egg, -with enlarged view of polygonal markings of egg; B, pupal spine immediately aftermolting; C, same, showing variation in outersheath; D, pupal spine just before changingcolor; E, male genitalia: F, antenna of female; G, distal portion of segment in in the maleantenna; H, distal portion of segment in in the female antenna; /, f orewing of adult femaleshowing costal margin at base of wing; J, same, showing variations in markings; K, forewingof male. * THE BLACK FLY OF CITEUS. 41 portion of the case is removed the ventral part appears under the microscope as darkThrown and more or less irregularly mottled. Submarginal area with usually 20 spinesforming a ring, varying considerably in length, but caudal pair nearly always curved outward. A pair of hairs present on caudal margin caudad of vasiformorifice. Spines on dorsum small excepting two pairs on abdomen and three pairson thorax. (Number and arrangement shown in PI. X, D.) Vasiform orificeprominent
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Photo credit: © The Reading Room / Alamy / Afripics
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Keywords: ., bookcentury1900, bookdecade1920, bookidblackflyofci, bookyear1920
