136 BULLETIN 19 9, UNITED STATES NATIONAL MUSEUM 



Range. — Pacific slopes from southern Sinaloa to western Guerrero, 

 inland about 125 miles in the southern part of its range. Recorded 

 only from Sinaloa, Nayarit, Jalisco, Colima, Alichoacan, and Guerrero, 



SCALARIS GROUP 



Species. — Seven forms are recognized at present, representing four 

 species. 



Bange. — High elevations from southeastern Arizona and central 

 Nuevo Le6n southward to the edge of the plateau in Oaxaca. 



KEY TO SPECIES OF THE SCALARIS GROUP OF SCELOPORUS 



1. Nasals and internasals in contact with rostral; no postrostrals.jalapae (p. 136) 

 Nasals and internasals separated from rostral by two postrostrals 2 



2. Dorsal scales 50 or more; lateral scales in slightly, although distinctly, oblique 



rows goldmani (p. 137) 



Dorsal scales less than 50; lateral scales in parallel rows 3 



3. One canthal 4 



Two canthals, the first occasionally forced above canthal ridge by contact of 



second canthal and subnasal 6 



4. Males with much black in ventral coloration; females suffused with black 



below; gular region never barred; black shoulder spot with a light blue spot, 

 if present, on its anterior edge; tail with a continuous dark median dorsal 

 stripe; tibia/head proportion usually less than 0.95; maximum snout-vent 



measurement 58 mm aeneus aeneus (p. 137) 



Black, if present on ventral surface, confined to bars in gular region, and a few 

 dark, transverse bars on sides of abdomen; black shoulder spot with the light 

 blue spot in its middle 5 



5. Tibia/head proportion usually less than 0.90; scales of second pair of post- 



mentals separated medially; dorsal scales usually more than 40; maximum 



snout-vent measurement 61 mm scalaris slevini (p. 138) 



Tibia/head proportion usually more than 0.90; scales of second pair of post- 

 mentals usually in contact medially; dorsal scales usually less than 40; 

 maximum snout-vent measurement 65 mm.. scalaris unicanthalis (p. 138) 



6. Males with much black in ventral coloration; black shoulder spot with the 



light blue spot, if present, on its anterior edge; tail with a continuous dark 

 median dorsal stripe; tibia/head proportion usually less than 0.90; maximum 



snout-vent measurement 56 mm aeneus bicanthalis (p. 137) 



Black, if present on the ventral surface, confined to bars in gular region, and a 

 few dark transverse bars on sides of abdomen; black shoulder spot with the 

 light blue spot in its middle; tail with dark chevron-shaped bars; tibia/head 

 proportion usually more than 0.90; maximum snout-vent measurement 

 78 mm scalaris scalaris (p. 137) 



SCELOPORUS JALAPAE GUnther 



Sceloporus jalapae Gtjntiier, Biologia Centrali-Americana, Reptilia and Batra- 

 chia, 1890, p. 74. — Smith, Proc. Biol. Soc. Washington, vol. 47, 1934, pp. 

 121-125, fig. 1; Publ. Field Mus. Nat. Hist., zool. ser., vol. 26, 1939, pp. 

 333-338, figs, 55, 56, pi. 27. 



Type. — Brit. Mus. Nat. Hist.; Mr. Hoge collector. 

 Type locality. — Jalapa, Veracruz. 



