Two specimens from southern Illinois (Perry County) are intergrades between _Z. h. pallidus_ and _Z. h. intermedius_. Cockrum and Baker (1950:3) mentioned that these individuals showed evidence of intergradation with _Z. h. pallidus_ in color of the pelage and the breadth of the least interorbital constriction. In other characters the specimens are most nearly like _Z. h. intermedius_ to which they are here referred. Animals from Lyon County, Iowa, also show intergradation between _Z. h. pallidus_ and _Z. h. intermedius_. These individuals are most nearly like _Z. h. pallidus_ in interorbital breadth of the skull but in other characters agree with _Z. h. intermedius_ and, therefore, are referred to that subspecies. Intergradation between _Z. h. campestris_ and _Z. h. intermedius_ is noted in a specimen from 7 mi. NE Glendive, Montana. This individual has the larger, broader, auditory bullae and more widely bowed incisive foramina of _Z. h. campestris_, but in color, in smaller external size, and in the majority of cranial characters it is best referred to _Z. h. intermedius_. Specimens from the north-central periphery of the geographic range of _Z. h. intermedius_ (northern Minnesota and Wisconsin) on the average are darker, have longer auditory bullae, wider bowed incisive foramina, and (some specimens) a slightly wider pterygoid fossa than is normal in more southern populations. This deviation from the norm is interpreted as intergradation between _Z. h. hudsonius_ and _Z. h. intermedius_. Individuals from Burnett, Price, and Oconto counties, Wisconsin, and those from Cass and southern Clearwater counties, Minnesota, show such intergradation but are here considered to be _Z. h. intermedius_. _Specimens examined._--Total, 199, distributed as follows: ILLINOIS: _Coles Co._: Fox Ridge State Park, 1 (UIM). _Fulton Co._: _1/2 mi. N Norris_, 2 (UIM); _3 mi. N Canton_, 1 (UIM); _2-1/2 mi. N Canton_, 2 (UIM); _2 mi. NW Canton_, 3 (UIM); 2 mi. W Canton, 1 (UIM); _3 mi. SW Monterey_, 1 (UIM). _Jo Daviess Co._: _near Galen_, 3 (FM). _Kane Co._: Sugar Grove, 1 (Chic. AS). _Lake Co._: Fox Lake, 4 (FM); _Pistake Bay_, 1 (FM). _Perry Co._: 6 mi. S Pinckneyville (near Pyatt), 2 (SITC). _Vermilion Co._: _Kickapoo State Park_, 2 (UIM); Jordan Creek, 3 mi. NE Fairmont, 5 (UIM). INDIANA: _Owen Co._: La Fayette, 1 (USNM). _Parks Co._: Turkey Run State Park, 2 (1 UM; 1 UIM). _Posey Co._: Hovey Lake, 1 (UM); New Harmony, 2 (Clev. MNH); no exact locality, 2 (UM). _Sullivan Co._: no exact locality, 1 (UM). IOWA: _Dickinson Co._: _Camp Forester, E Okeboji Lake_, 3 (ISC). _Emmet Co._: Fort Defiance State Park, 1 (ISC). _Hamilton Co._: _Little Wall Lake, Jewell_, 6 (ISC). _Ida Co._: Arthur, 1 (ISC). _Lyon Co._: Elgin Township, Sec. 35, 2 (ISC); _Riverside Township, Sec. 28_, 1 (ISC). _Palo Alto Co._: _Ruthven_, 1 (ISC). _Sioux Co._: Ireton, 1 (UM). _Story Co._: Ames, 1 (ISC). _Winneshiek Co._: Decorah, 3 (UM); _Ridgeway_, 11 (UM); Conover, 3 (UM).