Stem galle 
Woody stem swellings 
Callirhytie cornigera (O.S.). 415. Fig.117. Horned Knot Gall. Abrupt, cuts 
lika cheese when growing in May-June, horns finally projecting. 
Callirhytis punctata (O.S.). 471. Fig.129. Oak Knot Gall. Abrupt,completely 
encircling branch, covered with normal bark* 
Callirhytis similia (Bass.)# 479* Fig.120. Woody,club-shaped when terminal, 
containing one to four cells. 
Callirhytis phellos (Ashm.) • 467. Fig.124. Terminal on new shoots in spring, 
the larval cell supported by inconspicuous fibers. 
Callirhytis scitula (O.S.). 4 ~j6. Fig.119* Abrupt enlargement of new growth 
bearing normal leaves, 12-25 ram. in dia. May. 
Callirhytis tuberosa (Bass.). 481. Fig.299. A much shortened thickened 
portion of the new growth bearing many leaves, many-celled, up to 15 ram. 
long by 6 mm. in dia. In June. Rare. I have never reared it. 
Detachable 
Callirhytis ventricosa (O.S.). 485. Figs.144-5. Conical,short-pubescent, 
sessile,single,green when young in May,turning brown and dropping,in June. 
Callirhytis gemmaria (Ashm.). 456. Figs.155-6. Small ribbed galls in cluster 
on twigs in early spring,secreting honeydew when young, dropping later. 
Callirhytis excavata (Ashm.). 425. Figs.154,282. Lenticular,polished galls 
bursting out of bark and dropping in Sept. Difficult to rear. 
Dryocosmus imbricariae (Ashm.). 597. Banded Bullet Gall. Globular, 7-10 mm., 
red, single or in groups, dropping in fall. 
Dryocosmus floridensis (Beut.). 596. Fig.297- A rosette of green bracts on 
trunk or twigs, larval cell in center. Usually single. 
Amphibolips acuminata Ashm. 275. Fig.112. Spindle-shaped, up to 60 mm. long, 
green to red with a glaucous bloom. In spring. 
Bursting out thru bark in Oct., on vigorous sprout®i from stumps. Fig.l6l. 
Seen in Mo. and D.C. Never reared. 
Cells hidden under the bark 
Cell just under the bark in the wood of the current year's growth> this may 
be Callirhytis cryp ta (Ashm.). 4l8.Fig.l62. 
Leaf galls 
Detachable 
Amphibolips nubilipennis (Harris). 290. Fig.509. Like a green grape,almost 
translucent, succulent, up to 21 mm. in dia. May-June. 
Dryocosmus rilsyi (Ashm.). 401. Fig.2J7. Globular, brown, J mm. in dia., 
attached singly to a main vein usually on under side of leaf in fall. 
Dryocosmus deciduus (Beut.). 594. Fig.205. Black Oak Wheat. Cluster of up 
to 40 bursting out of midrib in early Oct. 
Callirhytis furva Weld. 455* Fig.212. Small cluster of globular galls, 5-4 
mm. in dia, each covered with short,straight brown hairs, in fall. 
Zopheroteras guttatum Weld. 564. Fig*248. Spherical, 1.45 -2.25 mm in dia. 
with purple spots,attached singly on under side of leaf in fall. 
Ellipsoidal, 5 nun* high by 1.7 mm. in dia.standing erect on upper surface in 
a group of about 20,nearly black. Cincinnati,©, and St.Louis,Mo. 
Woolly midrib cluster on under side of leaf in fall. Wool comes off clean 
leaving a conical gall with a sunken crenate top. Fig.2 0 9* 
Integral 
Dryocosmus palustris (Ashm.). 400. Fig.181. Globular, 10-17 ram.with a free- 
rolling cell,wall 1 mm. thick,appearing with leaves in early spring. 
Andricus ostensackenii (O.S.). 5^9« Small oak apple, 7-9 mm. in dia. and 
projecting on both sides of the leaf. 
Callirhytis nigrae (Ashm.). 452. Fig.254. Smooth elongated midrib swelling 
on under side of leaf in June. 
Callirhytis modesta (O.S.). 450. Fig.265. Hard confluent parenchyma 
thickenings projecting on both sides of the leaf. 
58 
