36 EUTAINIA. 



row scarcely if at all largei- than the rest. Scales of tail decidedly 

 carinated. Labial plates much developed. It has also 21 rows of 

 dorsal scales, and 106, not 130 spots, in series from head to anus. 

 The head is larger and much arched. 



The specimen from Paget Sound, may possibly belong to a closely 

 allied species, though it is much like that from California. 

 CaVfornia. 169. 80. 21. 27. 61. (98 spots) Dr. Gambel. 



^rr^"a!f'"}^^^-^^-^^-'^- ^- ^- (100") J- S.Bowman.. 



South of Rio "x 



Grande, N. 1 173. 90. 21. 15f . 4. (106 " ) Gen.Churchill, 



Mexico. ) 



Puget Sound. 161.53. 21. 12f. 2i (on dep.) Espl. Exped. 



15. HiBtaisiaa Ma.rcia,Iia, B. & G. — Prominent color light brown; 

 a vertebral paler line and one lateral on each side, more or less indistinct. 

 Three series of square black spots on each side, of about 5G-G0 in each series, 

 from occiput to anus. Sides of head black, -with a crescentic patch of yel- 

 lowish posterior to the labial plates. Three and sometimes four black 

 vittce radiating from the eye across the jaws. A double white spot with a 

 black margin on the suture of occipital plates. 



The markings about the head are generally very constant and dis- 

 tinct. Viewed laterally, we see first the large dark brown patch at 

 the back part of the head, extending as far back as the posterior ex- 

 tremity of the jawbones. In the anterior part of this patch is seen 

 the crescentic patch (concave before) of yellowish white, with a more 

 or less narrow dark-brown margin anteriorly. The next black band 

 starts from the posterior edge of the superciliarics, and passes ob- 

 liquely downwards and backwards along the posterior edge of the 

 6th upper labial. Similar black margins are seen on the posterior 

 edges of the 5th and 4th labials, the intervening spaces being yel- 

 lowish white, particularly on the 5th upper labial. Occasionally the 

 posterior margins of the 7th and 3d labials have the black line as 

 well as those mentioned, which frequently extend across to the pos- 

 terior margins of the corresponding lower labials. The white spot 

 on the anterior portion of the occipital suture is always margined 

 with black. 



The six series of black spots are arranged so as to alternate with 

 each other. The lower or third series on each side is below the indis- 



