250 DAVENPORT ACADEMY OF SCIENCES. 



and frequently provided with a short nipple. Their size varies 

 from three-sixteenths to one-half inch in diameter ; color either 

 uniformly greenish-yellow, sometimes reddish on one side or 

 around the base, or entirely dark red. 



Stem-mother. — Length i-i.6™"-- Color orange. Antennae 

 and legs blackish. Pyriform, broadest across the mesothorax. 

 Surface of body closely covered with minute sharp points and the ■ 

 anal end furnished with 6-8 rather stout bristles. Eyes small, 

 projecting, composed of 3-5 or perhaps more simple, colorless, eye- 

 lets. Antennae rather long and slender, the first joint stoutest, 

 wider than long, of uniform diameter, truncate at tip, with a 

 slender bristle near the apex ; joint 2 rather more slender, longer 

 than wide, most slender at base, rounded at anterior end and also 

 furnished with a bristle ; joint 3 about thrice the length of the 

 other two combined and divided by about eighteen rather coarse 

 and more or less irregular annulations, the last bearing a short 

 bristle ; terminal sensorium very small and oval. 



Migratory female. — Length of body o.8-i™™-. Expanse of 

 wings 3-3.6™"-. Color orange. Head, meso- and metathoracic 

 parts and sternal' plate blackish. Eyes black, antennae and legs 

 dusky. Head and prothorax rugose, the rugae of the head some- 

 what the coarsest. Antennae rather stout, joint i about as long 

 as wide, indistinctly scaly or annulate ; joint 2 slightly longer 

 than wide but slighth' narrower at base, rounded at apex and dis- 

 tinctly scaly ; joint 3 sharply annulate at about its basal half, the 

 anterior ' portion scaly ; anterior sensorium about one-half the 

 length of the joint, though sometimes either somewhat longer or 

 shorter ; the basal sensorium rather large and subcircular. Wings 

 large and broad, very pale or but faintly dusky, the veins some- 

 what darker and with fuscous shades ; stigma yellowish. 



Phylloxera subelliptica Shimer. 



Plate XV., figs. 118-119. 



Dadylosphcera subellipticum Shimer. Trans. Am. Ent. Soc, 2, 

 P- 389- 

 Of this species I am familiar with the gall only and reproduce, 

 therefore, Shimer' s description as published in the Tajisactjons of 



