. Bulletin. Natural history; Natural history. August 1985 Crayfishes and Shrimps of Illinois 373. Fig. 99.—Total distribution of Procambarus gracilis. Ttie eastern limit of its range is un- known. Illinois in February, March, April, and May. Brown (1955) found form I males in Illinois in August and October and females with young attached in March, April, and October. Brown's largest form I male was 39 mm CL, and his largest female was 47 mm CL. Williams & Leonard (1952) found young attached to many of the females collected in early spring in Kansas. Greaser (1932) Fig, 100. — Distribution
. Bulletin. Natural history; Natural history. August 1985 Crayfishes and Shrimps of Illinois 373. Fig. 99.—Total distribution of Procambarus gracilis. Ttie eastern limit of its range is un- known. Illinois in February, March, April, and May. Brown (1955) found form I males in Illinois in August and October and females with young attached in March, April, and October. Brown's largest form I male was 39 mm CL, and his largest female was 47 mm CL. Williams & Leonard (1952) found young attached to many of the females collected in early spring in Kansas. Greaser (1932) Fig, 100. — Distribution of Procambarus gracilis in Illinois. Open circle = 1922 record for the Kankakee River; black dots = 1972-1982 collections. noted that "females with young at- tached are taken in Missouri as late as ; Among all specimens collected in the present study, males outnumbered Table 7.—Frequency of occurrence of form I males, females carrying eggs (ovigerous), and females carrying young, in Illinois collections of Procambarus gracilis. N umbel ? v! umber diul Pel I em oi c;oii ei lions uiib Moiilh Collet lions l-'i 11 111 M: le-, ()\ i.^ei HIS •s F( Ml,lies Will ^ Ount; Febiuiiry 3 0 0 0 0 0 0 Marc ti 13 0 0 0 0 0 0 •Vpril 17 0 0 0 0 0 0 Mav 16 0 0 0 0 0 0 lunc 12 3 25 0 0 0 0 |ulv 6 1 17 0 n 0 0 .\llgUM 2 0 0 0 0 0 0 Scptcmbei IH 0 0 0 0 0 0 ()< lobtr 13 1 8 0 0 0 0 November 3 0 0 0 0 0 0. 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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