278 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ne 



Holbrookia maculata campi Schmidt 



Subspccific assignment of H. maculata in the Zuni region is based on 

 specimens examined by Ralph W. Axtell (in htt.), who has revived 

 the name campi and restricted it to Colorado Plateau populations 

 (Axtell, 1958). 



The lesser earless lizards that I collected are brown, red-brown, or 

 gray dorsally, with 10-17 darker blotches or interconnected spots 

 between extremes of limb insertions. They come from localities with 

 soils of similar coloration. H. m. camjpi also approximates substrate 

 color near Springerville, Apache County, Arizona, where specimens 

 taken on soil-covered lava are dark brown or gray in general aspect. 

 By contrast, an individual from the white sand along Choukai Wash, 

 San Juan County, New Mexico (UMMZ 120277), is white to light 

 gray, with darker gray dorsal spots (observations during three months 

 in captivity). It is identical with H. m. ruthveni, the pallid "sub- 

 species" of the White Sands, Otero County, New Mexico (see Smith, 

 1943b; 1946, pi. 20A). Other pallid specimens of H. maculata come 

 from the vicinities of Montoya (Quay County), Pedernal (Torrance 

 County), and Carrizozo (Lincoln County), New Mexico. I suggest 

 that H. m. ruthveni be relegated to the synonymy of H. m. approximans, 

 the form inhabiting lowlands soutli of the Colorado Plateau, since 

 this white sand population is not geographically unique in its only 

 distinguishing character, coloration. 



In the Zunis, lesser earless lizards are inhabitants of the Plains Life 

 Belt only. Four specimens come from the short-grass association in 

 which snakeweed and rabbitbush is locally abundant. Another is 

 from soil-covered malpais dominated by scattered junipers and apache 

 plume. A third was in open grassland near a thicket of shadscale 

 saltbush. Northeast of Prewitt where H. m. campi is associated 

 marginally with Cnemidophorus velox and Sceloporus graciosus, a 

 pureued earless lizard took refuge in the burrow of Dipodomys ordi. 

 C. velox and S. graciosus frequent heavier cover such as saltbush or 

 sage at this locality. 



Gravid females with the following snout-vent length, date of collec- 

 tion, and egg number and size provide an estimate of local reproductive 

 capacity in H. m. campi: 54 mm.. May 12, 1939, 6 avg. 9.8 x 5.2 mm.; 

 57 mm., July 16, 1957, 3 avg. 13.4 x 7.4 mm.; 48 mm., July 16, 1957, 

 3 avg. 12.8 x 7.5 mm.; 48 mm., July 16, 1957, 2 avg. 13.8 x 7.6 mm.; 41 

 mm., July 5, 1959, 2 avg. 12.2 x 7.6 mm. It is possible that this 

 iguanid deposits its eggs in response to summer rainfall (see discussion 

 under Sceloporus undulatus). 



Locality records: 



MCKINLEY CO.: 5.5 mi. S. Thoreau (CU 5624); 4 mi. ENE. Prewitt (CU 5456j ; 

 Upper Nutria (UMMZ 123135); Valencia co.: Grants (MCZ 6824*); Point of 



