1901.] NATURAL SCIENCES OF PHILADELPHIA. 19 



Koj to the Species. 



I. Body with lougitudinal stripes; 2 labials in orbit: 



A. — Body very slender ; tail long; lateral stripe on third 

 and fourth rows; all scales keeled, in 19 rows: 

 a. — Tail I of length, ol' rather more: 



7 upper labials; brown with 3 yellow stripes, 



1. E. saurita. 



8 upper labials; olive; dorsal usually absent, 



2. E. sackeni. 

 h. — Tail -J^ of length or rather less; 8 upper labials, 



3. E. jyroxima. 

 B. — Body stouter; tail shorter: 



a. --Scales in 21 rows (occ. 19) : 



a\ — Lateral stripe on third and fourth roAvs: 



Usuall}' 8 labials; 21 rows, . 4. E. megcdops. 



Usually 7 labials; occ. 19 rows, 5. E. radix. 



y. — Lateral stripe on second and third rows; labials 



8 (occ. 19 rows and 7 labials), 6. E. elegans. 



h.— Scales in 19 rows (occ. 21) : 



Usually 8 labials; head broad, . . 7. E. eque-^. 

 Usually 7 labials ; head narrow, . 8. E. sirtalis. 

 II. Body without stripes; 21 rows: 



1 labial in orbit; brown with 7 rows of spots, 



9. E. midtimaculata. 



2 labials in orbit ; brown with small reddish spots anteriorly, 



10. E. rufojnmetata. 



Eutaenia saurita L. 



Coluber saitrita L., Syst. Nat., XII, 335 (1766); Eutmiia saurita B. 

 and G., I. c, 24 ; Cope, I. c, 650, and Rep. Nat. Mus., 1020 ; Troju- 

 donotus saurita (part) BouL, I. c, I, 212. 



Upper labials 7 (rarely 8); oculars 1-3; temporals 1-2 (3); 

 body slender and elongated; tail from .36 to .28 of total length; 

 scales in 19 rows, all keeled; ventrals 150-170; subcaudals 95- 

 120; chocolate brown, with three yellow stripes, the lateral on the 

 third and fourth rows; belly yellow or greenish white; top of 

 head dark brown; a spot on parietals; labials yellow, unmarked. 

 The largest specimen I have seen is in the Academy's collection, 

 from Minnesota, and measures 865 mm. (tail 240). As is usually 

 the case with large examples, the tail is here rather short, 

 about .27. 



Hab. — United States, east of Mississippi river. 



