1 6 University of Michigan 



and is rare in the valleys of Maggie and James Creeks. The 

 adult was found at night under a well curb in Carlin. On 

 July 4, many small, recently transformed specimens were col- 

 lected in mud cracks in the bed of a dried up irrigation ditch 

 near Maggie Creek (PI. IV, Fig. 2). It was found that the 

 easiest method of collecting them was to stamp on the 

 ground. The vibration disturbed them and they would 

 thrust their heads out of the cracks. If the jar continued, 

 they came out and hopped about on the ground where 

 they were conspicuous and easily captured, but when the 

 stamping ceased they soon disappeared. A few had com- 

 pletely transformed, but the majority had tails varying 

 in size from mere rudiments to the length of the head 

 and body. Later many half grown specimens were observed 

 coming up out of the ground behind the mowers in a hay field 

 near Annie Creek. 



Crotaphytus ivislizenii Baird and Girard. 



Three adults, two partly grown specimens, and two newly- 

 born individuals taken on the flat west of the lower part of 

 Annie Creek. 



Our specimens conform closely to the descriptions of Cope, 

 VanDenburgh and Ruthven. The femoral pores are 19-22, 

 average in five specimens, 20. In two large females taken 

 July 13 and July 18 the under surface of the tail and two rows 

 of spots on each side of the body were bright orange in color. 



The species is apparently rare in Maggie Basin. It was 

 found in but one locality — the low flat north of the Humboldt 

 River and west of Annie Creek, and all of the specimens were 

 observed within an area a quarter of a mile square, although 

 the surrounding region was worked with great care. As a 

 rule, individuals are not easily alarmed, but if frightened they 



