13. COLVBRIDM 



but the whitish ventral plates usually are conspicuously 

 marked at their bases with black or dark brown. 



The young of this subspecies are not distinguishable from 

 those of L. g. boylii. All the larger individuals agree in 

 having the scales of the white rings marked basally with 

 black or dark brown. This black edging seems to appear 

 first upon those scales which are nearest the median dorsal 

 line, and to extend to the lateral ones and over more and 

 more of the surface of each scale as the snake increases in 



Length to anus 740 748 



Length of tail . 96 101 



Remarks. — This snake is so similar in appearance to 

 L. g. yumensis that I regarded them as identical. According 

 to Blanchard, however, this resemblance is only apparent, 

 and these two subspecies need never be confused. He states 

 that they are not even related directly. L. g. conjuncta 

 shows closer affinities with boylii than with yumensis^ "in 

 the pattern and scalation of the head, and in the fact that 

 its young are indistinguishable in the coloration of the white 

 rings from the young and adults of boylii -y and that the basal 

 shading of the white scales, which has resulted in the con- 

 fusion of the southern Arizona specimens with those from the 

 Cape Region, may well have been derived by conjuncta 

 directly from boylii, since the latter shows this character 

 sporadically throughout its range." 



Distribution. — The known range of this subspecies, as 

 restricted by Dr. Blanchard, is confined to the Cape Region 

 of Lower California. The type was taken by John Xantus 

 near Cape San Lucas. Mr. Belding found this snake at La 

 Paz. I have seen specimens from San Jose del Cabo. It has 

 been taken also at Santa Anita. 



