280 3. IGUANID& 



per in the localities from which lizards were collected. It 

 is surprising to note the great number of lizards, 69 per 

 cent, that had eaten one or more of these locusts. The next 

 insects in importance were ants. In quantity these are rela- 

 tively unimportant in comparison with grasshoppers. Among 

 the few beneficial insects eaten must be mentioned lady 

 beetles which were taken to a limited extent by 1 1 per cent 

 of the lizards. The occurrence within a stomach of vege- 

 table matter or grains of sand was only occasional, and un- 

 doubtedly was taken in accidentally with food." 



56. Sceloporus graciosus gracilis (Baird & Girard). 

 MOUNTAIN SWIFT 



Sceloporus gracilis BAIRD & GIRARD, Proc. Acad. Nat. Sci. Phila., Vol. 

 VI, 1852, p. 175 (type locality, Oregon); GIRAS.D, U. S. Explor. 

 Exped., Herpetology, 1858, p. 386, pi. 20, figs. 1-9; BOCOURT, Miss. 

 Sci. Mex., Kept., 1874, P- 190, pi. XVIII, fig. 4. 



Sceloporus graciosus BAIRD, Rep. Pac. R. R. Surv., Vol. X, 1859, p. 9; 

 COOPER & SUCKLEY, Nat. Hist. Washington Terr., 1860, p. 294; 

 LORD, Naturalist Vancouver Island, Vol. II, 1866, p. 308; COPE, 

 Proc. Acad. Nat. Sci. Phila., 1883, p. 21; COPE, Bull. U. S. Nat. 

 Mus., No. 32, 1887, p. 36 (part); STEJNEGER, N. Amer. Fauna, 

 No. 7, 1 893, p. 1 83 (part) ; VAN DENBURGH, Bull. U. S. Fish Commiss., 

 1894, p. 56 (part?); VAN DENBURGH, Occas. Papers Cal. Acad. Sci., 

 V, 1897, P' 74 (p ar t); McLAiN, Critical Notes, 1899, p. 3 (part); 

 COPE, Report U. S. Nat. Mus. for 1898, 1900, p. 386, fig. 63 (part); 

 MEEK, Field Columbian Mus., Zool. Series, Vol. VII, No. i, 1906, 

 p. ii (part); DITMARS, Reptile Book, 1907, p. 141 (part); STONE, 

 Proc. Acad. Nat. Sci. Phila., 1911, p. 228 (part); VAN DENBURGH, 

 Proc. Cal. Acad. Sci., Ser. 4, Vol. 3, 1912, p. 156 (part); RICHARDSON, 

 Proc. U. S. Nat. Mus., Vol. 48, 1915, p. 419 (part); DICE, Univ. 

 Cal. Publs. Zool., Vol. 16, No. 17, 1916, pp. 300, 301; CAMP, Univ. 

 Cal. Publs. Zool., Vol. 17, No. 7, 1916, p. 68. 



Sceloporus gratiosus COUES, Surv. W. looth Merid., Vol. V, 1875, p. 

 596 (part); BOULENGER, Cat. Lizards Brit. Mus., Vol. II, 1885, p. 

 230 (part); BOULENGER, Proc. Zool. Soc. London, 1897, p. 507 

 (part). 



