38. Upper jaw strongly serrate; usually with seven or more light lengthwise 



stripes between the eyes; plastron often with dusky color; Florida to 

 Texas 



Pseudemys concmna mobilensis (Holbrook) Mobile Cooter 

 Upper jaw practically smooth 39. 



39. Plastron with a dusky blotch 40. 

 Plastron without dusky color 41. 



40. Carapace rather low; soft parts brownish, with orange-yellow stripes; 



usually no vertical yellow stripe behind eye; Maryland to Alabama 

 Pseudemys concinna concmna (Le Conte) Barred Terrapin 

 Carapace more elevated; soft parts black, with greenish-yellow stripes; 

 with a yellow stripe from above eye turned downwards across tem- 

 poral region to join yellow stripes extending backwards from jaws; 

 Florida 



Pseudemys concmna suwannens^s (Carr) Suwannee Terrapin 



41. Light stripe across each upper ear region fused anteriorly with a light 



stripe on each side of mid-line of head; blotches on under sides of mar- 

 ginal plates wholly dark; Florida 



Pseudemys fiondana peninsularis Carr Peninsula Terrapin 

 Light stripe across each upper ear region distinct from the light stripe 

 on each side of mid-line of head; blotches on under sides of marginal 

 plates with light centers; N. C. to Ala. and Florida 



Pseudemys floridayia fiondana (Le Conte) Florida Terrapin 



42. Some of the stripes on sides of head broken to form spots or bars; usually 



with a vertical yellow bar behind each eye; Texas 



Pseudemys texana Baur Texas Terrapin or Cooter 

 Stripes on sides of head unbroken; no vertical yellow bar behind eye 43. 



43. With more than ten fine, light, lengthwise stripes on top of head between 



the ear regions; plastron usually yellow, with fine brown markings; 

 Fla. to La. 



Pseudemys alahamensis (Baur) Alabama Terrapin 

 With less than ten light stripes so situated 44. 



44. Blotches on under sides of marginal plates wholly dark; Florida 



Pseudemys nelsom Carr Nelson's Terrapin 

 Blotches on under sides of marginal plates with light centers; N. Y. to 

 Florida 



Pseudemys ruhnventns (Lc Conte) Red-bellied Terrapin 

 (Ptychemys rugosa (Shaw) ) 



45. Head and neck with conspicuous yellow, lengthwise stripes and mark- 



ings; sides of carapace usually flattened; rear margin of carapace ser- 

 rated Map Turtles 46. 

 Head markings not in definite stripes; sides of carapace usually slightly 

 convex in the adult; rear margin of carapace serrated or often prac- 

 tically smooth Pond Turtles and Diamond-backs 48. 



46. With a yellow mark in the form of a crescent or right angle, open to- 



wRvd the side, bent around behind each eye; Wis. to Ohio, Ala., and 

 Oklahoma 



437 



