. Bulletin. Natural history; Natural history. 78 Natural History Survey Bulletin Vol. 28, Art. tial agreement w ith those of the recently de- scribed hlanchardi (Harper 1947). Accord- ingly, the Illinois frogs are provisionally as- signed to blanchardi, even though this sub- species is doubtfully distinct from A. crepi- tans crepitans. Acris crepitans blanchardi Harper Blanchard's Cricket Frog Acris gryllus blanchardi Harper 1947:39 (type locality: meadow near Sraallen's Cave, Ozark, Christian County, Missouri). Acris gryllus gryllus nee Le Conte, Yarrow I882a:169. Acris gryllus, S.
. Bulletin. Natural history; Natural history. 78 Natural History Survey Bulletin Vol. 28, Art. tial agreement w ith those of the recently de- scribed hlanchardi (Harper 1947). Accord- ingly, the Illinois frogs are provisionally as- signed to blanchardi, even though this sub- species is doubtfully distinct from A. crepi- tans crepitans. Acris crepitans blanchardi Harper Blanchard's Cricket Frog Acris gryllus blanchardi Harper 1947:39 (type locality: meadow near Sraallen's Cave, Ozark, Christian County, Missouri). Acris gryllus gryllus nee Le Conte, Yarrow I882a:169. Acris gryllus, S. Garman 1884:44. Acris gryllus crepitans X gryllus, Cope 1889: 325, 331. Acris gryllus crepitans nee Baird, Yarrow 1882a:169. Acris crepitans. Schmidt & Necker 1935:64-5. Diagnosis.—A small hylid frog (largest Illinois specimen mm. from snout to vent), fig. 65, with digital discs scarcely wider than penultimate joints; extensivelj webbed feet; pointed head; tibia 58 per cent' or more of body length; usually a few to many dorsal warts; light line from each eye to shoulder; dark postfemoral stripe on each leg; numerous vertical, light bars on snout. Variation.—During the breeding season of Blanchard's cricket frog the male is easily distinguished from the female by the discol- ored throat and vocal pouch. Other dimor- phism has not been noted in the Illinois se- ries. I have been unable to find ontogenetic variation other than size. A study of adequate series reveals only minor geographic variation for this frog in Illinois. There is some indication that speci- mens in the southern fifth of the state are relatively small, the largest of a series of 37 specimens from this region being only 28 mm. from snout to vent. The largest speci- mens in series from other areas exceed this. Fig. 65.—An adult Acris crepitans blanchardi from McLean County, Illinois. The ground- color may be gray, brown, black, olive, or tan; the markings, when present, are green, olive, or rusty
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