. Bulletin. Natural history; Natural history. NOSTRIL \ INFRALABIAL SUPRALABIAL Fig. 161.—Lateral view of the head of a snake, Elaphe obsoleta. 13. Scale rows 15; light spots on rear of head; venter orange or red Sio- reria occipitomaculata occipitomaculata Scale rows 17; no occipital light spots; venter pink or white Storeria dekayi ivriffhtorum 14. Internasals 2, fig. 170 17 Internasals 1, fig. 171 15 15. Supralabials 6 or fewer on each side of head 16 Supralabials 7 or more on each side of head Farancia ahacura reinivardti 16. Supralabials 6, postoculars 2 on each side of head Virginia vale
. Bulletin. Natural history; Natural history. NOSTRIL \ INFRALABIAL SUPRALABIAL Fig. 161.—Lateral view of the head of a snake, Elaphe obsoleta. 13. Scale rows 15; light spots on rear of head; venter orange or red Sio- reria occipitomaculata occipitomaculata Scale rows 17; no occipital light spots; venter pink or white Storeria dekayi ivriffhtorum 14. Internasals 2, fig. 170 17 Internasals 1, fig. 171 15 15. Supralabials 6 or fewer on each side of head 16 Supralabials 7 or more on each side of head Farancia ahacura reinivardti 16. Supralabials 6, postoculars 2 on each side of head Virginia valeriae elegans Supralabials 5, postoculars 1 on each side of head I'irginia striatula 17. Scale rows 17; dorsal color green Opheodrys aestivus Scale rows more than 17; dorsal color not green 18 18. Scale rows strongly keeled; 2 or 3 post- oculars (if 2, less than 25 scale rows) 22 Scale rows weakly keeled ; 2 postoculars; 25-33 scale rows 19 19. Neck bands traversing parietals and unit- ing on frontals Elaphe guttata emoryi Neck bands, if present, not as above .20. Fig. 162.—Portion of the body of a snake, illustrating method of counting scale rows. Counts are customarily made one head length behind the head, at approximately mid-body, and just in front of the anus. 25. Scale rows 27-33 : infralabials 11 or more on each side of head 26 Scale rows 25 or less; infralabials 10 on each side of head 27. 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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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
