622 ZOOLOGY REPTILES AND BATIIACHIANS OF ARIZONA. 



elongation, completes the resemblance to a lyre, or rather a Jew's-harp. 

 The ground color appears upon the vertex as an anchor-shaped figure, and 

 on the cheeks as an oblique band. The back, as far as the anus, has 21 pairs 

 of deep-brown spots, their gemination only apparent anteriorly by the punc- 

 tulate character of the scales in their intervals. These are always about 3 

 scales wide; the lesser ones 2 anteriorly, 1 posteriorly. Dorsal spots 7 

 scales wide ; as the scales are broader posteriorly, the spots are also. An 

 irregular series of lateral spots, one opposite each of the intervals, some- 

 times confluent with the dorsal spots, anteriorly forming a very narrow 

 broken band. Another series of spots involves the tips of pairs of the gas- 

 trosteges, which are separated by 2 to 5 immaculate ones. Ten confluent 

 pairs of spots on the tail above. Whole under surface whitish. From the 

 orig. descr. 



This tropical form is one of the most interesting of the later additions 

 to our fauna. It was first discovered in the United States by Dr. B. J. D. 

 Irwin, U. S. A., at Fort Buchanan, Ariz. ; but had been previously taken at 

 Cape Saint Lucas. In describing it, Professor Cope at first referred it to 

 the genus Lycodon, Dumeril, but subsequently placed it in Trimorpltodon. 



The Sibon annulatum var. septentrionalis (Dipsas septentrionalis, Kenn., 

 U. S. & Mex. Bound. Surv., ii, pt. ii, 1859, Reptiles, 16), from Southwestern 

 Texas, will probably be found in the Territory. For the position of this 

 form, see Cope, Proc. Phila, Acad., 1860, 266. 



64. Hypsiglena ochrorhyncha chlorophaea, Cope. 



a. OCHRORHYNCHA. 



Hypsiglena ochrorhynchus, COPE, Proc. Acad. Nut. Sci. Phila., 1860, 246 (type of 

 the genus), (Cape Saiut Lucas). Id., Check-List, 1875, 38. 



b. CHLOROPHJ3A. 



Hypsiglena chlorophtea, COPE, Proc. Acad. Nat. Sci. Phila., 1860, 247 (Fort Buchanan, 



Ariz.). 



Hypsiglena ochrorhytichus var. chlorophaza, COPE, op. cit., 1866, 304. 

 Hypsiglena ochrorhynchus subsp. chlorophaia, COPE, Check-List, 1875, 38. 



My specimens from Arizona, the precise locality not indicated, are of the 

 variety clilorophcBa, originally described as a distinct species. The numerous 

 small dorsal spots are mostly divided. The original form is from Lower 

 California. The Arizonan variety is described substantially as follows : 



