. Bulletin. Natural history; Natural history. 248 Illinois Natlral History Survey Bulletin Vol. 28, Art. 1 north of the Shawnee Hills region. The ex- treme southwestern Illinois specimens which could more logically be expected to display flavigaster characters are actually neglecta X flavigaster intergrades. N. e. flavigaster, at least formerly, extended up the Illinois River. Conant (1949) viewed Carman's Peoria record with doubt, but I once ex- amined a specimen of flavigaster, in the col- lection of H. J. Van Cleave, labeled "Ha- vana, ; Havana is only a few miles south o
. Bulletin. Natural history; Natural history. 248 Illinois Natlral History Survey Bulletin Vol. 28, Art. 1 north of the Shawnee Hills region. The ex- treme southwestern Illinois specimens which could more logically be expected to display flavigaster characters are actually neglecta X flavigaster intergrades. N. e. flavigaster, at least formerly, extended up the Illinois River. Conant (1949) viewed Carman's Peoria record with doubt, but I once ex- amined a specimen of flavigaster, in the col- lection of H. J. Van Cleave, labeled "Ha- vana, ; Havana is only a few miles south of Peoria. This specimen has since been lost, but others are extant from Cal- houn County, the eastern border of which is on the Illinois River. Specimens from the Mississippi River floodplain (Alexander to Jackson counties) are neglecta X Fig. 232.—Distribution of Natrix erythro- gaster. Vertical hatching indicates the pre- sumed range of the subspecies flavigaster in Illinois; horizontal hatching, the presumed range of the subspecies neglecta; crosshatch- ing, the area of intergradation between the two subspecies; solid circles indicate locali- ties represented by specimens examined during this study; open circles, localities represented by published records believed to be valid. The lower map depicts the total range of the species in the United States. Although undocumented by specimens, published records for the following localities are believed valid and are indicated on the distribution map by hollow symbols: Jack- son County: Carbondale, Crab Orchard (Cagle 1942a); Peoria County: Peoria (H. (larman 1892) ; Union County: Anna (H. Carman 1892). Natrix erythrogaster neglecta Conant Northern Copperbelly Red-Bellied Water Snake Natrix erythrogaster neglecta Conant 1949:5, fig. 1 (type locality: 3 mi. E Mount Victory, Hardin County, Ohio). Tropidonotits sipedon erythrogaster nee For- ster, Yarrow 1882a:136 (I). Nerodia sipedon erythrogaster nee Forster, H. Garma
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