PERGANDE — NORTH AMERICAN PHYLLOXERINiE. 



229 



Stem-moThek. — The stem-mother varies from 0.8-1.3"""- 

 in length, and is about half as wide. Shape broadly-ovoid, 

 pointed posteriorly, almost globular in the older specimens. 

 Color pale yellow, with a faint dusky tinge, slightly orange or 

 dull greenish-yellow in the older specimens. Antennss and legs 

 black. Eyes dark red or black or purplish-black and rather small, 

 with two deep, blackish, median punctures a little in front of 

 them. On the head an oblique, blackish depression each side 

 anteriorly, a larger subdorsal depression each side on the pro- 

 thorax, and a blackish, subdorsal spot in the three following 

 sutures, all of which spots, with the exception of those on the 

 head, become more or less completely obliterated in older speci- 

 mens. There are, in addition, four rather prominent warts along 

 the front edge of the head, one each side behind the antennae, 

 one each side at inner edge of eyes, one each side of the two 

 punctures and two at the posterior margin. Two similar warts 

 each side of the thoracic and one each side of the abdominal seg- 

 ments. Beside these warts there are two transverse rows of 

 four warts across each of the thoracic and one row of four across 

 the abdominal segments, each bearing a short, stiff hair. Surface 

 of body densely covered with minute sharp points. Front of 

 head more or less concave. Antennae rather short, but little 

 more than one-half the length of the posterior margin of the 

 head: joint i very stout and but little longer than wide; joint 2 

 more slender, longer than wide, stoutest and almost straight at 

 apex; joint 3 slender, of nearly uniform diameter, somewhat 

 curved and quite coarsely annulated, its tip truncate, surmounted 

 by a stout hair and two smaller ones a little below the tip ; thumb 

 small and insignificant. I^egs and tarsi rather stout, the termi- 

 nal pair of the tarsal bristles (or digituli) with the knob much 

 larger and more conspicuous than usual. 



Egg and larva white or faintly yellowish ; the sculpturing of 

 the eggs extremely delicate and sub-obsolete. Surface of the 

 body of the larva densely covered with minute granulations ; eyes 

 red, antennas and legs whitish. 



Pup^ pale orange, the younger specimens <vhitish or pale yel- 

 low, with the external edge of the wing-pads often blackish. 



[Proc. D. a. S., Vol. IX.] 28 [Oct. 31, 1903.] 



