PERGANDE — NORTH AMERICAN PHYLLOXERINJE. 2I9 



pale yellow in the younger and faintly brownish-yellow in the 

 older. Eyes dark purple. Antennae and legs dusky or blackish. 

 There are usually two, more or less distinct (in some quite large, 

 in others entirely lacking) black, double impressions on the 

 head, somewhat in front of the eyes ; several small black spots on 

 the prothorax (often indistinct or wanting), two of which are 

 near the anterior margin, and a group of three subdorsal spots 

 each side, posteriorly ; there is also a subdorsal spot in each of 

 the first three abdominal sutures. Surface of body almost 

 smooth, the sculpturing being almost invisible. Front of head 

 more or less concave, with a short hair each side of the concavity. 

 Antennae short, the first joint stoutest and almost globular, the 

 second longer than wide and of almost uniform diameter; the 

 third slender, slightly stoutest towards the end and quite coarsely 

 annulate. 



Eggs. — White, or with a faintly yellow tinge, highly polished 

 and with a distinct hexagonal sculpture. 



lyARV^ and younger Pup^E white or with but the faintest yel- 

 low tinge; eyes red; antennae and legs very faintly dusky. The 

 whole body densely covered with very minute points. The 

 younger pupae are marked with dusky spots very much as in the 

 stem-mother. Wing-sheaths faintly dusky. 



Pupa, mature. — Color orange, the mesothorax, wing-pads and 

 two or three terminal abdominal segments whitish, the meso- 

 thorax often with a somewhat greenish tinge. Eyes and spots 

 indicating the ocelli, red. Antennae and legs pale dusky. There 

 are two small dusky spots behind the ocelli, and a subdorsal curved 

 row of six blackish punctures on each side of the prothorax, the 

 posterior three of which are arranged in a triangular group, 

 similar to those of the stem-mother. . Antennae stout and with 

 but faint indication of sculpture. Entire surface of body densely 

 and quite coarsely granulate. 



Migratory female. — I,ength of body about i '"'"■. Expanse 

 of wings 2. 3-2. 5™"- Color pale orange, palest toward the end 

 of the body. Front of head, as far as the posterior edge of the 

 eyes, the two middle lobes of the the mesothorax and the sternal 

 plate, blackish, all other parts dusky or brownish, with a yel- 

 lowish tinge. Posterior half of head pale orange. Eyes brown ; 



