. Bulletin. Natural history; Natural history. November, 1961 Smith: Amphibians and Reptiles of Illinois 89 Madison County locality, although he cited specimens from southeastern Missouri. I have not been able to find the species any- where north of Union County. Hyla crucifer crucifer Wied Northern Spring Peeper Hyla crucifer Wied 1839:275 (type locality: Leavenworth, Leavenworth County, Kans- as) ; Schmidt 1929:10. Hyla crucifer crucifer, Pope 1944^:95-100. Hyla pickeringii, Kennicott 1855:593. Hyla pickcringi, Davis & Rice 1883fl:28. Diagnosis.—A small Hyla (largest Illi- nois specimen 3
. Bulletin. Natural history; Natural history. November, 1961 Smith: Amphibians and Reptiles of Illinois 89 Madison County locality, although he cited specimens from southeastern Missouri. I have not been able to find the species any- where north of Union County. Hyla crucifer crucifer Wied Northern Spring Peeper Hyla crucifer Wied 1839:275 (type locality: Leavenworth, Leavenworth County, Kans- as) ; Schmidt 1929:10. Hyla crucifer crucifer, Pope 1944^:95-100. Hyla pickeringii, Kennicott 1855:593. Hyla pickcringi, Davis & Rice 1883fl:28. Diagnosis.—A small Hyla (largest Illi- nois specimen 34 mm. from snout to vent), fig. 76, tan or brown, usually with a distinct pinkish cast; a prominent dark X-mark on the back and a dark mark between the eyes; toe pads distinctly wider than penul- timate joints; snout projecting beyond mouth in lateral view; without suborbital light spot or light maxillary stripe. Variation.—The male in this diminutive hylid is somewhat smaller than the female and possesses longitudinal gular folds, which permit expansion of the vocal pouch. Dur- ing the breeding season, the throat of the male is discolored and saclike. Juveniles tend to have a less well-defined dorsal pattern and the groundcolor is usual- ly lighter. Geographic variation is not pronounced in the Illinois series. Spring peepers from. Fig. 76.—An adult Hyla crucifer crucifer from Monroe County, Illinois. The groundcolor is pink or tan; the markings are Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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