13. COLUBRID.^ 



The back and sides are blackish brown; the former, with 

 a rather indistinct longitudinal line composed of cinnamon 

 colored spots upon the centers of the scales of the median 

 series, and upon the inner edges of those forming the first 

 row on each side of this series; the latter, with a few scales 

 of the first and second rows dotted, centrally, with cinna- 

 mon or yellowish white. A band of cinnamon crosses 

 the nape. The gulars^ genials and inferior labials, are 

 blackish brown with paler centers. The plates on 

 the top and sides of the head are brownish black, with faintly 

 indicated dots of raw umber upon the loreal, pre- and post- 

 ocular plates, and near the posterior edges of the supra- 

 oculars and parietals. There are six cinnamon colored 

 blotches on the upper surface of the tail. The gastrosteges 

 and urosteges are entirely brownish black, with the excep- 

 tion of the first 1 gastrosteges, which show faint cinnamon 

 colored dots. 



A small specimen (290 mm.) has, on the sides, rather 

 numerous cinnamon colored blotches or enlargements of a 

 similarly colored longitudinal line. This line is of about 

 the width of one row of scales, and occupies the tips of the 

 gastrosteges and the lower half of each scale of the first 

 series. 



Length to anus 840 



Length of tail 125 



Distribution. — The three known specimens were secured 

 at San Jose del Gibo, Lower California, Mexico. 



