close to the prevailing colors of the local substrate. Cophosaurus texanus is a sexually dimorphic species, in addition to size differences, males and females differ in some aspects of colors and markings. Most noticeable in males are a pair of black bands located on the posterior third on the sides of the body, rising from two blue patches on the margins of the belly up sides and arching forward and ending before meeting on the back. The body anterior to the black bands is suffused with some shade of pink, orange, or red, and the body posterior to the black bands tented green, aqua-green, or lime-green. The colors are most prominent in the Chihuahuan greater earless lizard (C. t. scitulus) and are greatly enhanced and most noticeable in the breeding season in all subspecies. In parts of their range they are colloquially referred to as "the lizard with the pink shirt and green pants." In contrast, females either lack the black lateral bands entirely or they are very faint and indistinct. Females and young often exhibit a lateral white or near white stripe running between the forelimbs and hind limbs and on the back of the legs. The subspecies were diagnosed in the original description with the following characters. Cophosaurus t. texana: typically, 80–86%, have 79 ventral scales or less from collar (last gular fold) to anus, 40 or more scales in head length, and 27 or less total femoral pores. Cophosaurus t. scitula: 80–84% have 80 or more ventral scales, 39 or less head scales, 28 or more femoral pores. Cophosaurus t. reticulata: 85–100% have 82 ventral scales, 36 or less head scales, less than 31 femoral pores, and the black lateral bars are faint and do not extend above the lateral fold in males. Distribution The Greater earless lizard occurs in southwestern United States (Arizona, New Mexico, and Texas) and northern Mexico (Chihuahua, Coahuila, Durango, Nuevo Leon, San Luis Potosi, Sonora, Tamaulipas, and Zacatecas). Elevations ranging from 127 to 2100 meters have been reported. The Texas greater earless lizard (C. t. texanus) occurs in the Edwards Plateau region of central Texas and northward to the state border and southeastern areas of the Texas panhandle. It ranges southward into the Tamaulipan mezquital ecoregion, along the Rio Grande into northeast Coahuila and north-central Nuevo León, Mexico. In south-central Tamaulipas it's occurrence becomes increasingly spotty and localized with records just across