PEKGANDE — NORTH AMERICAN PHYLLOXERIN^U. 236a 



pads, rostrum and two impressions on the head dusky. They 

 are broadest about the wing-pads, tapering gradually towards the 

 end of the body and covered C densely with minute, acute points. 

 Head convex in front and sHghtly emarginate or notched at the 

 middle. JIAntennae slender, almost one-third the Ifength of the 

 body, the third joint thinnest at about its basal third and quite 

 densely serrate or scaly; the upper sensorium is short, elonga- 

 ted and accompanied at one side by two to four circular pores, 

 while the tip is furnished with two or three small hairs. Wing- 

 pads curved outward. I/Cgs and digituli normal. 



The eggs produced by the pupae are pale-yellow, highly polished 

 and apparently without any sculpturing. Those producing the 

 males are about one-third smaller than the female eggs. 



Migratory female. — I^ength of body 0.6 to o.8'™'- 

 Kxpanse of wings 2 to 2.4"""-. Color yellow to orange ; the head, 

 thoracic lobes, scutellum-'and sternal plate blackish, with some 

 dusky markings on the prothorax. Antennae and legs yellow, 

 shaded with dusky. Eyes and ocelli black. or dark-purplish. 

 Head and thorax faintly sculptured. The antennae are rather 

 long and slender and almost half the length of the body; the 

 basal jdint is about as long as wide and the second slightly longer 

 than wide, narrowest at base and rounded at the apex; both are 

 faintly sculptured. The so-called third joint is distinctly and 

 sharply divided into two separate parts or independent joints ; 

 the lower or smaller section, which I designate as the third 

 antennal joint, is sharply' truncate at the apex, smooth, cyl- 

 indrical, slightly curved^and usually slightly stoutest near the 

 apex, from which point it suddenly tapers to a short, conical 

 petiole, with two or more sharp annulations. The sensorium 

 of this joint is rather broad, abnormally long and reaches 

 from the apex to the petiole. The terminal or fourth joint is 

 almost twice the length of the third ; it is slightly curved and 

 faintly tapering, its base rounded and prolonged in a short, cyl- 

 indrical petiole, composed of from three to six very fine and sharp 

 annulations ; its sensorium is also abnormally long and reaches 

 from near the apex to the rounded base. The sensorial nipple 



