Colls hidden under the bark 
Callirhytie modular!s Weld* 447* Fig.166* Celia in the pith of current 
year'8 growth; no evidence until exit holes are seen . 
Leaf galls 
Detachable 
Amphibolips nubilipennis (Harris). 290. Fig.3o9. Like a green grape, 
succulent, almost translucent, up to 21 mm. in dia.,in May-June. 
Callirhytis lanata (Gill.). 443. Fig.2o6. Woolly midrib cluster on under 
side of leaf in fall, dropping before the leaves. 
Callirhytie piperoides (Bass.) • 469* Fag.201. Cluster of upper or lower 
side, each sprerical,red,pubescent,1-4 mm.in dia,, dropping in fall. 
Callirhytie furva Weld. 433- Fig.212. Small cluster of globular galls, 
3-4 mm.,each covered with short,straight brown hairs, upper side,fall. 
Dryocosmus riieyi (Ashm.). 4ol. Fig.237. Globular,browni3 mm., in dia., 
on a main vein, under side in fall,dropping when mature. 
Dryocosmus albidus Weld. 392. Figs.242,312. Depressed sphere, white or 
rosy,fleshy up to 5.4 mm. in dia.,on under side , single, late fall. 
Zopheroteras compressum (Gill.). 362. White,on under side as leaf is 
turning brown. Type gall is ellipsoidal, 2.7 by 1.8 mm.,brown,the 
surface slightly wrinkled. Included from literature. 
Zopheroteras hubbardi (Ashm.). 365. Fig.308. Ellipsoidal,white,2*3 by 
1.85 by 1.7 mm. From this gall an adult determined as this species 
was reared. 
Zopheroteras guttatum Weld. 364 • Fig.248. Spherical, 1.45 -2.5 mm. 
with purple spots, single on under side on secondary vein in fall. 
Dryocosmus deciduus (Beut.). 394. Fig.205. Black Oak Wheat. Cluster of 
up to 40 bursting out of midrib in early Oct. 
Integral 
Amphibolips confluents (Harris). 280. Fig.174. Spongy Oak Apple. Aborts 
the development of the leaf. 
Amphibolips coelebs (O.S.). 279* Fig.191. Spindle-shaped, 28 by 4.5 mm., 
green, the prolongation of a vein. 
Callirhytie pedunculate (Bass.). 461. Fig.190. Spindle-shaped but small, 
with an inner free-rolling cell, the prolongation of a vein. 
Dryocosmus palustris (Ashm.). 400. Fig.181. Globular, 10-17 mm. in dia., 
with a free-rolling cell, wall thick, in very early spring. 
Andricus ostensackenii (O.S.). 319. A small oak apple, 7-9 mm. in dia., 
projecting on both sides of leaf, 
Dryoosmus notha (Ashm.). 399. Fig.182. Green, wall thin and transparent, 
with a free-rolling cell, tip prolonged into a sharp point on upper 
surface of the leaf. Single. In May-June. 
Dryocosmus cinereae (Ashm.). 395* Fig.183. Hemispherical, thinr-walled, 
with a free-rolling cell, sessile on under side of leaf in May-June. 
Callirhytis modesta (O.S.). 45o* Fig.265. Hard,confluent parenchyma 
thickenings projecting on both sides of leaf in June. 
Callirhytia bipapillata Weld. 409. Figs.267#517* Isolated parenchyma 
thickenings in large numbers, projecting on both sides of the leaf 
in June. Rare on this host. 
Callirhytia pigra (Bass.). 468. Fig.257. Fleshy, smooth midrib swelling 
on the basal half of the leaf in midsummer. 
Callirhytie tumifica (O.S.). 483* Fig.255. Midrib swelling at base of 
leaf blade or on petiole , many-celled, green,in May-June. 
Swollen base of petiole remaining attached to stem over winter, 2 mm. in 
dia.; sometimes bears a scar. 
55 
