Acorn galls 
Callirhytis operator (o.S.) agamic. 455b. Fig.65. A pip gall baaide mature 
acorns in the fall. 
Callirhytis perditor (Bass.)#.462. A pip gall in spring on small acorns of 
previous year, secreting honeydew, dropping when mature. 
Callirhytis fructuosa Weld* 452. Fig«70. Stony hard, many—celled mass 
inside a mature acorn in the fall. 
Callirhytis fructicola Ashm. 451. A stone gall not distinguished from the 
above in the field. 
Callirhytis sp. Fig.74. A pip gall in Sept, on acorns of current season. 
Adults emerged the second spring. Never described. 
Amphibolips prunus Cresson. 291. Fig.59. A plum gall on side of acorn cup 
in fall, dropping when mature. 
Bud galls 
An Amphibolips similar to Amp hibolip s c ookii Gill.28 1. Green, 7-10 mm.,not 
spotted, from side of one of terminal buds in the fall. Adults emerged 
Jan.2,14 and in second spring. Never described. 
Oallirhytid glomerosa Weld. 459* Fig.ll4. Smooth,,green or brown(in sun),in 
fall, about 5 mm. in dia., over half projecting beyond bud scales. 
Stem galls 
Woody stem swellings 
Callirhytis cornigera (O.S.). 4l5* Fig.117. Horned Knot Gall. Abrupt, cuts 
like cheese in May-June, becomes woody, horns finally protrude and drop. 
tuberosa (Bass.). 481. A much shortened thickened portion of the 
new growth bearing many leaves, many-celled, up to 15 mm. long by 6 mm. 
in dia. In June. Rare. The type host.Fig.299. Have never reared it. 
Callirhytis sirailis (Bass.). 479* Fig.120. Woody, club-shaped when terminal, 
containing 1-4 cells. June. The type host. 
Detachable 
Dryocosmus imbricariae (Ashm.). 597. Banded Bullet Gall. Globular, red, 
7=10 mm., in dia., single or group on twigs, dropping when mature, fall* 
Callirhytis ventricosa (O.S.). 4 85. Fig.l44. Conical, short-pubescent, 
sessile, single or group bursting out of bark, green when young in May. 
Callirhytis gemmaria (Ashm.). 456 . Figs.155,156. Small ribbed galls in 
cluster surrounding twig in early spring, secreting honeydew when 
young and dropping when mature. 
Callirhytis excavata (Ashm.). 425. Figs.154 ,282. Lenticular, polished, 
bursting out of bark and dropping when nature in Sept. Difficult to 
rear. 
Cells hidden under bark 
Callirhytis medularis Weld. 447. Fig.l66. Cells in the pith of current 
year'8 growth. 
Leaf galls 
Detachable 
Amphibolips nubilipennis (Harris)# 290. Fig.509* Like a green grape 
almost translucent, succulent, up to 21 mm. in dia. In May-June. 
Dryocosmus deciduus (Beut.). 594. Fig.205. Black Oak Wheat. Cluster of up 
to 4o bursting out of midrib on upper or lower side, dropping later. 
Dryocosmus rileyi (Ashm,). 401. Fig.257. Globular, brown,5 mm. in dia., on 
one of main veins on under side of leaf in fall. 
Callirhytis piperoides (Bass.). 469. Fig.201. Cluster on upper or lower side 
of leaf, each red, pubescent, 1_4 mm. in dia., dropping in the fall. 
Callirhytis lanata (Gill.). 445* Fig.2o6 • Woolly midrib cluster on under 
side of leaf in fall, dropping before the leaves. 
Callirhytis furva Weld. 455. Fig.212. Small cluster of globular galls, 5-4 
mm.,covered with short,straight brown hairs, on upper surface in fall. 
Integral 
Amphibolips confluenta (Harris). 280. Fig.174. Spongy Oak Apple. Aborts 
the development of the leaf. Agamic females emerge in Oct. 
56 
