37. FICIMIA—38. HYPSIGLENA 779 
across the line of meeting of the prefrontal, supraocular, 
and frontal plates and is continued below the eye to the 
margin of the mouth, embracing all of the fourth labial. 
The four anterior infralabials have dark margins. The 
belly is white or yellowish, without markings. 
Menthe) tol arse eee eee 117 135 165 293 
Wength. of \tarli os 228 20 23 57 
Distribution — This snake is known only from five 
specimens. These are the type from Fort Buchanan in 
southeastern Arizona, a second specimen labeled merely 
Southern Arizona, one from El Paso, Texas, one found 
dead on the shore of Lake Walters at the White Sands, 
west of Alamogordo, New Mexico, and one secured in 
Montezuma Canyon, Huachuca Mountains, Cochise County 
Arizona. 
Genus 38. Hypsiglena 
Hypsiglena Corr, Proc. Acad. Nat. Sci. Phila., 1860, p. 246 (type, 
ochrorhynchus). 
Pseudodipsas Peters, Mon. Berl. Acad., 1860, p. 521. 
Comastes Jan, Elenco Sist. Ofid., 1863, p. 102. 
The body is small, with moderate, slender tail. The 
head is distinct from the neck by reason of the swollen 
temples, which in old individuals are greatly enlarged. The 
snout is rounded and rather prominent. The head plates 
are normal. The nasals rarely unite above the nostril. Two 
(or three) preoculars and two postoculars are present, as is 
also a loreal. Temporals are normally one followed by 
two. The scales are smooth, in 19 or 21 rows, with apical 
pits. The anal plate is divided. Urosteges are in two rows. 
The eye is of moderate size or small, with vertically elliptic 
pupil. 
