| OCR Text |
Show 492 MR. G. A. BOULENGER ON THE [May 18, D. Eemoral pores 11-17 ; auricular scales usually much longer than broad. Waco, Texas u j, San Antonio, Texas Duval Co., Texas. Taylor .... »> ;» >» •••• ,. ,, ,, .... »» ?> »» •••• » i> j? •••• i> »> tt •*•• >» >» >> ••• • Fort Lowell, Arizona. Gilbert. Colorado Bottom. Smiths. Inst. Tampico, Jalisco. Bichardson... 1. 86 79 83 78 83 80 73 113 102 102 77 108 93 62 113 96 67 2. 18 16 16 16 16 16 15 22 20 20 16 21 19 14 20 18 15 3. 20 18 18 18 18 17 16 24 22 22 17 25 21 15 23 20 16 4. 19 18 18 19 19 18 17 24 24 24 18 26 22 16 25 21 17 5. 24 23 24 26 27 25 23 29 29 30 22 29 27 19 29 28 23 6. 27 27 29 30 28 28 28 30 28 31 30 29 26 25 30 29 28 7. 6 6 5 6 5 6 6 5 5 5* 6 7 6 6 6 5 6 8. 38 36 36 36 36 38 36 38 38 36 40 40 38 36 36 34 38 9. 14-16 14-12 16-15 16-17 13-12 13-14 13-11 14-11 14-14 13-13 11-11 14-12 14-15 12-11 13-12 12-13 13-13 Brown, greyish, or olive above, usually with a more or less distinct light stripe along each side of the back; more or less regular dark brown or blackish bands may be present across the back ; these bands may be broken up into spots or so extend as to obscure the ground-colour. Dark bars are usually present across the digits, but may be absent, irrespective of the structural characters or the localities. The type of S. clarkil, from Arizona, is described as uniform yellowish green above, and we possess a uniform greenish specimen from Eorf Lowell, recently received from the Stanford University through Prof. Gilbert as S. clarkil, with which it agrees in its ear-scales ; whilst a second specimen from the same locality, received under the same name, and agreeing in the ear-scales, has the dorsal cross-bars of S. spinosus and barred toes. S. magister is described by Hallowed (from Port Y u m a and Tueson, Arizona) as " straw-colour above, without spots or blotches." Our specimens from Arizona, answering to the definition of S. magister given by Stejneger, vary much in coloration and cannot be distinguished in this respect from specimens from Mexico, referred to the typical S. spinosus, and Texas, the latter being considered by Stejneger as a distinct species, S. fiorldanus, Baird. This is described by Baird as " greenish yellow, with twro broad yellow stripes, five scales apart; back with distinct transverse blackish bars." A black blotch is usually present in front of the arm, and may ascend up the sides to form an incomplete nuchal collar. This is best marked in some specimens from Arizona, Colorado, and Presidio near Mazatlan. 1 a m unable to reconcile the differences in the coloration of the upper parts with any structural characters. The same may be said of the coloration of the lower parts. |
