Dec., 1914.] 
Insect Galls of Cedar Point. 
383 
Fig. 28. Quercus macrocarpa affected by the gall-wasp 
Neuroterus floccosus Bassett. 
Cynips floccosa Bassett, Can. Ent. XIII :111. 
Neuroterus exiguissima Bassett. 
N. exiguissimus Dalla Torre and Kieffer. 
Beutenmuller, Bull. Am. Mus. XXVIII:123. 
Leaf gall, single-chambered, evident as a yellow-green blister 
on upper surface, and especially as a circular, convex, rust-colored 
patch of pubescence on lower surface. 3-4 mm. diameter. 
Common. Huron, late July. 
Fig. 29. Ulmus racemosa affected by the mite Eriophyes ulmi 
Garman. 
Phytoptus ulmi Garman, 12th Rep. Ills. State Ent. 1882. 
Cook, Ins. Galls Ind. 861. 
Leaf gall on upper surface, showing as a tiny spherical pouch 
with narrow constricted neck. Green Island, July 20. Uncommon. 
Fig. 30. Ulmus americana affected by the louse Colopha 
ulmicola Fitch. 
Byrsocrypta ulmicola Fitch, 5th Rep. Nox. Ins. N. Y. 1858:843. 
Thelaxes ulmicola Walsh. 
Pemphigus ulmicola Packard. 
Glyphina ulmicola Thomas. 
Colopha compressa Koch. 
Colopha eragrostis Middleton. 
Patch, Bull. 181 Me. Ag. Exp. Sta. 196. 
Leaf gall on upper surface, of the well-known cock’s-comb 
type, being an elongated pouch or fold, dorsally crested. 10-30 
mm. long x 5-10 mm. high. Green, soon discoloring. 
Fig. 31. Ulmus americana affected by the louse Schizoneura 
lanigera Riley. 
Schizoneura americana Riley in part. 
Patch, Bulls. 203 and 217 Me. Ag. Exp. Sta. 
Leaf gall, being a worm-like inrolling of the edge toward the 
under side, quite variable in size. Found empty in midsummer, 
and hence assumed to be caused by S. lanigera, which, as Miss 
Patch has found, differs from S. americana in migrating to the 
apple after the spring brood has formed galls on the elm. 
Fig. 32. Celtis occidentalis affected by a mite Eriophyes sp. 
Phytoptus sp. with fungus Sphaerotheca phytoptophila Kell et al. Kan. 
Ag. Exp. Sta. Rep. 1888:302. 
Cook, Ins. Galls Ind. 862. 
“Witch-broom” gall, evident as a multiplication of twigs 
from a single source, accompanied by profusion of buds which 
often telescope and abort, giving base of tuft a scaly appearance. 
Confined mainly to smaller branches, less than in. diameter. 
Common. The fungus which formerly shared blame with the 
insect is now thought by many to be merely a secondary and 
incidental affair, the real culprit being the mite. 
