280 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



1093. Monse River. Aug. 25, 1873. 



1100. Big Muddy River. June25, 1874. 



1117. Porcupine River. June27, 1874. 



1119. Big Porcupine River. June29, 1874. 



1130. Frenchman's River. July 8, 1874. 



1132. Near Frenchman's River. July 12, 1874. 



1132 6ts. Near Frenchman's River. July 12, 1874. 



1132 ier. Near Frenchman's River. July 12, 1874. 



1135. Two Forks of Milk River. July 15, 1874. 



To the foregoing species of Ophidians observed by the Boundary 

 Commission may be added short notices of the following, known to 

 occur in the Yellowstone region, and very probably extending farther 

 north : — 



EuT-^NiA PKOXiMA. {Say) B. & G, 



Say^s Garter SnaTce. 



Coluber proximus, Say, Long's Exped. R. Mts. 1. 1823, 187.— Habl. Journ. Acad. Nat. 



Sci. Phila. v. 1827, 353. 

 Tropidonotus proximus, Hallow. Sitgreaves'e Rep. Expl. Zufii and Colorado R. 1853, 134, 



146. 

 Eutainia proxima, Bd. & GiR. Cat. N. A. Reptiles, 1853, 25.— Allen, Proc. Bost. Soc. N. 



H. xvii. 1874, 69 (Yellowstone).— Kenn. apud BD..U. S. Mex. B. Surv. ii. pt. 



ii. 18.^9, Reptiles, 16. 

 Eutcenia proximo, Cope, Check List N. A. Bat. and Rep. 1875, 40. 



This is a stout species, like E. radix and U. twiningi, the total length 

 only about 3^ times that of the tail. The dorsal stripe is ochraceous- 

 yellow ; the lateral greenish-white or yellow on the third and fourth rows 

 of scales ; the dorsal rows are 19 in number. Carinas of scales of dorsal 

 region are of a whitish hue, which gives the species a streaked appear- 

 ance, and the upper anterior border of the last row of scales is lined 

 ■with white. There are also irregular white spots near the row of black 

 ones above lateral line; these are more profuse in some places than 

 others. The belly is greenish-white, more yellowish anteriorly. Its 

 known range is east of the Rocky Mountains, from the region of the 

 Yellowstone to New Mexico and Texas. Specimens are in the National 

 Museum from Texas, California, Wisconsin, North Carolina, Mexico, &c. 

 A specimen from Tomales Bay, California, is the type of U. imjperialis. 



EUT^NIA SIETALIS PICKERINGI. {B. <& G.) 



Pickering's Garter SnaJce. 



a. SIRTALIS. 



Coluber sirtalis, Linn. Syst. Nat. i. ed. 12, 1766, 383.— Gm. Syst. Nat. i. pt. iii. ed. 13, 

 1788, 1] 07.— Hakl. Journ. Acad. Nat. Sci. Phila. v. 1827, 352.— Harl. Med. and 

 Phys. Res. 116.— Stoker, Rep. Reptiles Massach. 1839, 221. 



Tropidonotus sirialis, Holbr. N. Am. Herpet. iii. 1842, 41, pi. 11. 



Eutainia sirialis, Bd. & GiR. Cat. N. A. Rept. 1853, 30. 



