. The Canadian entomologist. Insects; Entomology. â ^hM}S!!S3JS^. ^iMIMMm c B Fig. 28.âAphis cuscutse, A, antenna; B. cornicle, of winged viviparous female; C, cornicle of wingless viviparous female. Antennae reaching about to base of cornicles, segments III and filament of IV subequal, the former being slightly the longer, III subequal in length to IV and V combined, segment III with about 40 to 50 circular, slightly tuberculate sensoria scattered irregularly over the surface, and the usual sensoria at distal end of segment V and VI base (fig. 3a). Beak not quite reaching to coxae of th
. The Canadian entomologist. Insects; Entomology. â ^hM}S!!S3JS^. ^iMIMMm c B Fig. 28.âAphis cuscutse, A, antenna; B. cornicle, of winged viviparous female; C, cornicle of wingless viviparous female. Antennae reaching about to base of cornicles, segments III and filament of IV subequal, the former being slightly the longer, III subequal in length to IV and V combined, segment III with about 40 to 50 circular, slightly tuberculate sensoria scattered irregularly over the surface, and the usual sensoria at distal end of segment V and VI base (fig. 3a). Beak not quite reaching to coxae of the middle pair of legs. Wings normal, veins narrow, and blackish, the branch- ing of the third discoidal nearer the tip than point where second branches. Cornicles moderately long and reaching just a little beyond tip of body in live specimens (fig. 3b). Cauda typical of the genus, being slender, conical and constricted near the middle. The prothorax with a tubercle which is hidden by the mesothorax in mounted specimens; also a rather prominent tubercle on each side of the first abdominal segment. Measurements: (Averages) Length of antennal segments III, ; IV, ; V, ; VI, base, ; VI, filament, mm.; cornicles mm.; Cauda, mm. Pupa: Head dusky, thorax pale yellowish green and abdomen marked as in apterous form, but lacking the black markings and bearing a row of rather conspicuous pulverulent spots on each side of the median dorsal line, and the entire body covered with a fine inconspicuous pulverulence. Antennae dusky to blackish, excepting segment III and base of IV, which are whitish. Eyes dark reddish brown, almost Beak not quite reaching coxae of middle pair of legs. Wing-pads blackish at tips. Legs whitish, the tips of tibiae and femur and all of the tarsi blackish. Cornicles black and not quite reaching to tip of Cauda. Cauda pale with an almost imperceptible duskiness. Wingless viviparous female: General colour pale green (Smit
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Keywords: ., bookcentury1900, bookdecade1910, booksubje, booksubjectentomology
