458 bulletin: museum of comparative zoology. 



All of the following are axolotls. Some of the Colorado specimens 

 show pigmentation on the belly, differing thereby from the unpig- 

 mented belly of normal J. tigrinum larvae. The Mexican specimens 

 are spoiled on the belly. 



CoL.: Boulder Co., 1,441 (2); Heart Lake, 11,000 ft., 4,748-4,753 (6); 

 Pike's Peak, 280; South Park, 985 (12); 986 (20); 4,530; 4,531.— 

 N. Mex.: Santa Fe, 1,918 (2).— Mex., 2,370; Lake Xochimilco, 2,657; 

 Mexico, 254 (2); 1,654 (5); [1,705 (2)]; 2,357 (3); 2,623; [San Juan 

 Teotihuacan, 2,266 (4)]. 



41. Ambystoma jeffersonianum (Green). 



N. B.: Assikeag, 2,094.— Me.: Eddington, 1,580.— N. H.: Milan, 979.— 

 Mass.: Amherst, 977; Arlington, 2,309 {larva); 2,310 {young); Berlin, 

 975; Boston, 978; [Cambridge, 4,545; 4,546]; Concord, 2,886; Sher- 

 born,972; 2,002; Springfield, 2,096 (2) ; Ware, 987 (2); Waverley, 1,996 

 (2); Wenham, 2,093.— N. Y.: St. Lawrence County, Black Lake, 30 

 May, 1,860 (30 larvae); Somervllle, 166 (3); 1,201.— Mich.: Flint, 

 2,092 (2); Oakland County, 1,570 (3); OUvet, 4,362; 4,363. 



42. Ambystoma macrodactylum Baird. 

 Montana: Powell County, Nigger Hill, 6,500 ft., 2,885. 



43. Ambystoma cingulatltm Cope. 

 Fla.: Pensacola, 204 (2); 229 (2). 



44. Ambystoma microstomtim Cope. 



Loc. ? 4,360; 4,361.— Mo.: Jefferson County, 2,782 (2). 



45. Ambystoma tenebrosum Baird and Girard. 



Cal.: Berkeley, 4,364^,370 (7); Palo Alto, 2,547; near Palo Alto, 2,346. 



Plethodontidae. 



46. Batrachoseps pacificus (Cope). 

 Cal.: Santa Cruz Island, 3,169-3,194 (26). 



