PERGANDE — NORTH AMERICAN PHYLLOXERINiE, 227 



are often as many as ten, of which several may be confluent, on 

 the same leaf. 



Stem -MOTHER. — The fully grown stem -mother measures 

 between o.S-l"""- in length, the younger broadly pyriform, the 

 older perfectly globular. Color pale yellow with a slight dusky 

 tinge. Antennae and legs blackish. Eyes small, black, scarcely 

 seen from above. Surface of body closely covered with minute 

 points. No piliferous warts noticeable. Antennae rather long 

 and stout ; joint i about as long as broad and of nearly uniform 

 diameter; joint 2 longer than broad; joint 3 about thrice as long 

 as the two basal joints together, of nearly uniform diameter, or 

 sHghtly thinnest at about the middle and divided by about 

 eighteen rather coarse, more or less distinct annulations. The 

 thumb is minute though quite distinct. 



Eggs. — Perfectly white, highly polished and with distinct, 

 large, hexagonal sculpturing. 



Earva. — White, the larger ones faintly yellowish, the eyes 

 red. In the larger individuals may be noticed a group of promi- 

 nent granules, just at the anterior angles of the mesothorax. 

 Surface of body very minutely granulate. There are four small 

 round warts along the front edge of the head, each bearing a fine 

 hair, and one just opposite the eyes. Similar, though rather 

 sparsely distributed warts, are noticed all over the body, but on 

 account of their pale color they are not easily seen. The pupae 

 are of the same pale color as the larger larvae. 



Migratory femai^e. — Rather slender. Eength of body 0.8- 

 1.2"'"-. Expanse oi wings 2.2-2.6"'"-. Color pale yellow, the 

 prothorax and posterior half of the head darker. Anterior half 

 of head, mesothorax, scutellum and sternal plate brownish or 

 blackish. Eyes dark brown. Ocelli yellowish, bordered nar- 

 rowly with black at inner side. Antennas and legs pale dusky. 

 Insertion of antennae white. A small dusky subdorsal spot each 

 side of the prothorax. Wings large, pale fuscous, the veins and 

 stigma darker, the surface quite densely scaly. Surface of body, 

 densely but minutely granulated. Antennae about as long as the 

 head is wide posteriorly : joint i about as long as wide or slightly 

 longer and slightly narrowest at base ; joint 2 also about as long 

 as wide, almost globular and with distinct, sharp, scaly annula- 



