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Michigan: Bay City (types; also some hybrids with erinacei; Kin- 
sey coll.). Flint (E. S. Anderson in Kinsey coll.). Big Rapids, Gray- 
ling, and West Branch (inch hybrids with erinacei, Kinsey coll.). Tekon- 
sha and Three Rivers (Kinsey coll.). 
Indiana: Mongo, Bedford, and 7 miles east of Bloomington (Kinsey 
coll.). Fort Wayne (incl. hybrids with erinacei, Kinsey coll.). St. 
John and Aurora (incl. hybrids with ozark; Kinsey coll.). 
Illinois: Sparland, Seneca, and Pana (incl. hybrids with derivatus 
and ozark; Kinsey coll.). Eddyville (incl. hybrids; 0. Buchanan coll.). 
Missouri: Arcadia (incl. hybrids with ozark; Kinsey coll.). 
Virginia: Big Stone Gap (incl. hybrids with erinacei, Kinsey 
coll.). Flint Hill, Homeville, Golansville, and Winchester (incl. hybrids 
with pezomachoides; Kinsey coll.). 
Kentucky: Berea and Pinehill (Kinsey coll.). Cleveland, Pine- 
ville, and Whitley (incl. hybrids with ozark, Kinsey coll.). Livingston 
(incl. hybrids with erinacei, Kinsey coll.). Hellier (hybrids with 
ozark; M. I. Spilman in Kinsey coll.). 
Tennessee: Oakdale, Tazewell, Charleston, Columbia, and Madison- 
ville (incl. hybrids named advena, Kinsey coll.). 
North Carolina: Hendersonville (incl. hybrids with advena; Kin- 
sey coll.) . 
Georgia: 6 miles north of Trion (hybrids with derivatus, Kinsey 
coll.). Hartwell (incl. hybrids with pezomachoides ). 
Pure populations probably restricted to the area just south of the 
Canadian Zone, from northern New England to Boston, and from north- 
ern Michigan to Northern Indiana. Southward, especially in the moun- 
tains, wheeleri appears as a segregate from hybrids all the way into 
Georgia and Missouri. Figure 65. 
TYPES. — 90 females, many galls. Holotype and paratype females 
and galls in the Kinsey collection. Paratype females and galls in the 
American Museum of Natural History, the Museum of Comparative Zo- 
ology, the U.S. National Museum, the California Academy, Stanford 
University, the Field Museum, the British Museum, and the Vienna 
Museum. Labelled Bay City, Michigan ; galls October 2, 1927 ; insects 
November 20 and December 8, 1927 ; Q. alba; Kinsey collector. 
The types are selected from a series of 1045 insects from Bay City. 
At this locality one may find true erinacei, hybrids of erinacei and 
wheeleri, and true wheeleri. 
The most northern collections which we have for Cynips 
pezomachoides represent localities in northern Michigan, 
southern Maine, and central New Hampshire. Every large 
series from these areas includes a goodly percentage of 
ivheeleri, which is a small and very dark insect with a smooth, 
shining, and naked mesonotum. The remaining insects of 
these same series represent every gradation between wheeleri 
and erinacei. Out of the 1,045 insects which I bred from ma- 
