. Bulletin. Natural history; Natural history. 84 Illinois Natural History Survey Bulletin Vol. 28, Art. 1 to secrete themselves under objects or in cracks in the ground. Its food consists of small arthropods. Breeding occurs from early March into May, the peak occurring in late March. The song, egg-laying habits, and develop- ment are presumably similar to those of P. t. feriarum, although both hatching and transformation occur later in the season than in feriarum. Illinois Distribution.—P. i. triseriata occurs commonly throughout Illinois except in the southern tip of the state, where it is r
. Bulletin. Natural history; Natural history. 84 Illinois Natural History Survey Bulletin Vol. 28, Art. 1 to secrete themselves under objects or in cracks in the ground. Its food consists of small arthropods. Breeding occurs from early March into May, the peak occurring in late March. The song, egg-laying habits, and develop- ment are presumably similar to those of P. t. feriarum, although both hatching and transformation occur later in the season than in feriarum. Illinois Distribution.—P. i. triseriata occurs commonly throughout Illinois except in the southern tip of the state, where it is replaced by P. t. feriarum, and in the Wabash River valley, where it is replaced by a feriarum X triseriata intergrade popu- lation, fig. 69. Although undocumented by specimens, published records for the following locali- ties are believed valid; most are indicated on the distribution map by hollow symbols: Cook County: Deer Grove (Necker 1939f) ; Palatine (Schmidt & Xecker 1935) ; West Northfield (Yarrow 1882^); Du Page County: Downers Grove (Schmidt & Necker 1935) ; Kane County: Elgin (Schmidt & Necker 1935) ; Lake County: Beach (Schmidt & Necker 1935); Fort Sheridan (Pope 1919) : Fox Lake, Half Day, Highland Park (Schmidt & Necker 1935); Volo, Waukegan (Necker 1939c); Madison County: Mitchell (Hurter 1893); Ogle County: Oregon (H. Gar- man 1892); St. Clair County: Bluflf Lake (Hurter 1893); Will County: Lockport (Schmidt & Necker 1935). Pseudacris streckeri illinoensis Smith Illinois Chorus Frog Pseudacris streckeri illinoensis, P. W. Smith 1951:190 (type locality: 3 mi. N Meredosia, Morgan County, Illinois). Pseudacris streckeri illinoiscnsis, Schmidt 1953: 76. Pseudacris feriarum brachyphonus nee Cope, Weed 1923:49. Pseudacris sp., Walker 1932:382. Diagnosis.—A medium-sized hylid frog (largest Illinois specimen 42 mm. from snout to vent), fig. 70, with a toadlike habitus; vestigial webs; intercalary cartilage; digi- tal pad smaller than penultima
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