Walnut aphids in California . tral area; veins brown, the third discoidal curving considerably to meet itssecond fork; second fork twice as near to the first fork as to the apex of the wing;stigmatic vein obsolete in its middle portion. Legs longer in proportion to the bodythan in the winged viviparous female, pale greenish yellow, with a large dusky areanear the apex of all six femora; apices of tibiae and tarsi dusky gray. Abdomenshort, not quite as long as the head and thorax together, widest at the third segment;segments 1 to 7, inclusive, with two lateral black spots, one on each side; se
Walnut aphids in California . tral area; veins brown, the third discoidal curving considerably to meet itssecond fork; second fork twice as near to the first fork as to the apex of the wing;stigmatic vein obsolete in its middle portion. Legs longer in proportion to the bodythan in the winged viviparous female, pale greenish yellow, with a large dusky areanear the apex of all six femora; apices of tibiae and tarsi dusky gray. Abdomenshort, not quite as long as the head and thorax together, widest at the third segment;segments 1 to 7, inclusive, with two lateral black spots, one on each side; segments1 to 6, inclusive, and segment 8 with two dorsal black spots, one on either side of thedorso-median line; the lateral spots on segments 1 to 6, inclusive, are circular or sub-circular; the dorsal pairs on these segments are oval; the dorsal spots on segments 6and 8 coalesce narrowly in the middle. Cornicles on segment 6, hardly perceptible,broader than long. Cauda globular, dusky, half as long as the hind tarsus. Repro-. , Monellia caryx: Male pupa.(Original.) 26 BULLETIN 100, U. S. DEPARTMENT OF AGRICULTURE. ductive organ white, when extended about as long as antennal joint IV. Beak paleyellow, extending a little beyond the first pair of coxae. Sterna and apical half ofthe underside of the head dark brown. Very often one or more of the dusky abdominalspots are absent. Measurements: Length of body, mm.; width of body, mm.;wing expanse, mm.; cauda, mm.; antennal joint I, mm.; joint II, mm.; joint III, mm.; joint IV, mm.; joint V, mm.; jointVI, mm.; filament, mm. Described from four specimens collected at San Jose, Cal., in 1912.
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Keywords: ., bookcentury1900, bookdecade1910, bookidwalnutaphidsinca100davi
