122 BULLETIN 199, UNITED STATES NATIONAL MUSEUM 



KEY TO SPECIES OF THE TORQUATUS GROUP OF SCELOPORUS '«» 



1. Supraoculars in a single series, with no scale divided 2 



Supraoculars in 2 series; or, if in one series, with one or more scales divided. 9 



2. Femoral pores 8-14; dorsal scales 25-35 3 



Femoral pores more than 14; or dorsal scales more than 35 5 



3. Dorsal nuchal collar broadly interrupted medially by a space about 5 scales 



wide; throat mottled torquatus binocularis (p. 126) 



Dorsal nuchal collar broad, complete; throat not mottled 4 



4. Femoral pore counts on both sides usually total more than 21; dorsal scales 



usually 31 or more serrifer plioporus (p. 124) 



Femoral pore counts on both sides usually total less than 22; dorsal scales 

 generally less than 31 serrifer serrifer (p. 123) 



5. Dorsal scales 31 or less 6 



Dorsal scales more than 31 7 



6. Nuchal collar divided on each side of neck, the area between lighter in color; 



dorsal color light, with dark and light spots irregularly placed; size large 

 (maximum snout-vent measurement 129 mm.); dorsal scales more strongly 



keeled and mucronate torquatus melanogaster (p. 126) 



Nuchal collar broad, complete; dorsal color dark, without light spots; maxi- 

 mum snout-vent measurement 98 mm.; dorsal scales more weakly keeled 

 and mucronate torquatus torquatus (p. 125) 



7. Lateral scales about one-half as large as median dorsals -lineolateralis (p. 126) 

 Lateral scales as large as or larger than dorsals 8 



8. Dorsal scales 40 or more; nuchal collar narrow, with light borders broken; a 



light line on side of head and another on side of neck; each dorsal scale 



usually with a light median spot jarrovii jarrovii (p. 128) 



Dorsal scales usually less than 40; nuchal collar broad, with unbroken light 

 borders; no light lines on sides of head and neck; no spots on dorsal scales. 



buUeri (p. 125) 



9. Lateral scales with the terminal point arising well within the free posterior 



margin; dorsal scales 41 or more 10 



Lateral scales with the terminal point arising at or very near the free posterior 

 margin; head scales not microscopically rugose; no oblique dark blue lines 

 on throat 11 



10. Dorsal scales 47 to 54; throat with very distinct, oblique, dark blue lines; 



head scales not microscopically rugose; oblique dark bands on sides of body 

 distinct; maximum snout-vent measurement 79 mm. 



dugesii intermedius (p. 127) 



Dorsal scales 41 to 50; throat without or with very faint oblique lines; head 



scales microscopically rugose; oblique dark bands on sides of body indistinct 



or absent; maximum snout-vent measurement 87.5 mm; femoral pores not 



over 13 dugesii dugesii (p. 127) 



11. Dorsal scales 55 or more ornatus ornatus (p. 127) 



Dorsal scales less than 55 12 



12. Dorsal scales 47 to 53 ornatus caeruleus (p. 127) 



Dorsal scales less than 47 13 



13. Tail with very distinct, broad, alternating dark and light bands, most distinct 



toward tip, where they are complete; supraoculars in 2 complete rows; 

 head scales very irregular; light borders of nuchal collar broad; a broad light 

 band across neck behind occiput; preocular usually entire; inner row of 

 labiomental scales generally terminating at a point posterior to suture be- 

 tween second and third infralabials poinsettii (p. 125) 



"» For one other species of this group, see footnote 72a. 



