Vor. IIT] VAN DENBURGH AND SLEVIN—ARIZONAN REPTILES 421 
No. 35159, has scale rows 21-19-17, gastrosteges 157, anal 
entire, urosteges 67, supralabials 8-8, infralabials 10-11, pre- 
oculars 1-1, postoculars 3-3, loreal 1-1, temporals 1+3, pos- 
terior genials longer. 
These snakes were caught in mud puddles on the desert a 
mile or more from the river. 
Mr. Herbert Brown sent us a number from Yuma, but 
they were destroyed in the San Francisco fire of April, 1906. 
70.—Thamnophis megalops (Kennicott) 
We have six specimens of this garter snake. Nos. 35158, 
35160, 35161, were collected at Fairbank, Cochise County, 
August 15-17, 1912. Nos. 33876, 33877, and 33878, were 
caught at Tucson, March 20-April 13, 1912. These speci- 
mens all have loreals 1-1, preoculars 1-1, anal entire, posterior 
genials longer. No distinct postoral light crescents, no very 
definite dark blotches on nape, lateral lines on the third and 
fourth rows of scales. Variation is shown in the following 
table: 
No. Scale rows g =) aS 3 3 Temporals 
8 7 & ir) 9 
Z e a « % 
o 5 a 5 oy 
33876 | 21—19—17 162 75 8—8 | 10—10 | 3—4 } 1+3 
33877 | 21—19—17 154 38+} 8—9 |} 10—10 | 3—4 |} 1+2—1-+3 
33878 | 21—19—17 157 74. 8—8 | 10—10 | 3—3 } 1+3 
35158 | 21—23—21—19| 159 77 8—8 | 10—i0 | 3—4 } 14+2+3 
35160 | 21—19—17 161 8—S8 | 10—10 | 3—3 |} 14+2+4+3 
35161 | 21i—19—17 162 72 8—9 | 10—10 | 4—4 | 14+2+3 
The specimens secured at Tucson were caught close to the 
Santa Cruz River. No. 33876 was caught at about 4 p. m. 
in a pool near a ditch. It was swimming several inches be- 
low the surface of the water, seemingly in pursuit of the little 
fish which were very numerous in the pool. The snake soon 
coiled up under some brush at the edge of the pool, and there 
we captured it. On the morning of March 30, 1912, we were 
walking along the banks of the Santa Cruz River hunting 
frogs, when we heard a cry similar to that of a young kitten. 
