348 



CALIFORNIA ACADEMY OF SCIENCES 



[Proc. 4th Ser. 



blackish-brown spots on the tip of each gastrostege form a row extending 

 nearly to the tail. The lower surfaces are yellowish with numerous small 

 blackish spots. 



Length to anus, 890 mm. 



Length of tail, 252 mm. 



Variation. — No. 11509 has the first eleven urosteges undi- 

 vided. These scales are all paired in all of the other specimens 

 except No. 4974 of the Stanford University collection, in which 

 the first urostege is unpaired. The following table shows ihe 

 principal variation in squamation. 



TABLE OF SCALE COUNTS, Dromicus occidentalis, new species. 



All the Narborough specimens have the characteristic light 

 nuchal blotches and dark spots on gastrosteges and lower lateral 

 scales. The dark spots on the lower laterals are most numerous 

 on the scales of the first row in all specimens except the type. 

 The row of spots along the tips of the gastrosteges extends to 

 the vent in No. S. 4975 and S. 4976, nearly to the vent in 

 No. S. 4974, and past the middle of the body in No. S. 4973. 

 All the specimens show the longitudinal light stripes except 

 No. S. 4975, which is spotted without any trace of stripes. The 

 general dorsal coloration of this specimen is similar to that of 

 the snakes of Albemarle and Brattle, but it shows the light 

 blotches on the nape, and dark spots on gastrosteges and 

 laterals, which are characteristic of the Narborough snakes. 

 No. 11509 is intermediate in coloration between No. S. 4975 

 and the other Narborough specimens. It shows' both stripes 

 and spots most distinctly. 



General remarks. — The snakes of Narborough agree with 

 those of Albemarle and Brattle in the large number of their 



