Occasional Papers of the Museum of Zoology 29 



respectively. The ground color above is olive brown, darker 

 on the body and lighter on the neck. The sides are pale yel- 

 low between the stripes. The belly is bright yellow for most 

 of the length, on the posterior part and the tail becoming dull 

 red or reddish orange. Along the ends of the ventrals is a 

 more or less complete and distinct dusky band which on the 

 anterior part becomes broken up into spots, and may be pale 

 reddish orange. The chin and throat and anterior part of the 

 ventral surface are spotted with black, the spots exhibiting a 

 tendency to be arranged in two rows, and there may be two 

 rows of small spots on the posterior part of the abdomen. 



A colony of striped racers was found in the habitat of 

 Cneuiidophorus tigris, i. e., on the flat along the north side- 

 of the Humboldt Valley west of Annie Creek. Four speci- 

 mens were taken here among or near some rocks which had 

 been exposed. Another was seen on the sagebrush flat north of 

 Carlin, and one was taken among large rocks in the canyon 

 east of Maggie Canyon in the Seetoya Range. It is probably 

 a comparatively common snake throughout the region. The 

 stomach of one specimen contains an adult Cnemidophorus 

 tigris. 



Bascanion constrictor zrttistum (Baird and Girard). 



One specimen taken in the valley of the Humboldt River, 

 one at the foot of the slope and two near the summit of the 

 Cortez Range. 



The dorsal scale formula is 17-15 in two specimens, and 

 17-15-13 in two. In one of the specimens with 17-15. the rows 

 are dropped before the middle of the body, in the other just 

 behind the middle. In the specimens with the formula 17-15- 

 13, there are 17 only on the neck in one and 13 to beyond the 

 middle of the body, in the other there are 17 nearly to the 

 middle and 13 for only a short distance. There are 7 supra- 



