Cope.] -"* [Nov. 20, 



specimens from the same locality, so that the form communis had best be 

 regarded as another subspecies of the G. sexlirieatus. The latter is the 

 only one which is found in the Eastern and Austroriparian districts of 

 North America. 



Subspecies sexlineatus ; Nos. 14236-41-49-69 ; 14305. 



Subspecies guttatus B. & G. 14231-41-305-308. 



Subspecies No. 3 ; 14231-50-308. 



Subspecies No. 4 ; 14241-50-302-5. 



Subspecies No. 5 ; 14237-50-302. 



Subspecies Tigris B. & G. 14237-50-302. 



11. Eumeces obsoletqs B. & G. Two specimens ; No. 14244. 



Ophidia. 



12. Salvador^ grahami/e Bd. Gird. Two specimens ; Nos. 14255-95. 



13. Rmnechis elegans Kenn. Arizona elegans Kennicott, U. S. Mex. 

 Boundary Survey, Reptiles, page 18, Plate . Pityophis elegans Cope, 

 Check List Reptiles N. Amer., p. 39. 



This species exhibits all the characteristics of the genus Rhinechis, 

 which is represented by a single species of Southeastern Europe, the It. 

 scalaris. The genus agrees with Pityophis and Spilotes in its entire anal 

 scutum ; but differs from the former in having but two postfrontal scuta, 

 and from the latter in its prominent rostral plate. 



The Chihuahua specimen of this rare species differs somewhat from the 

 type. It possesses twenty-seven rows of scales. The sides are of the 

 darker tint of the dorsal spots, from which it results that the light inter- 

 spaces of the dorsal region are entirely enclosed. There is no distinct 

 row of lateral spots. No. 14298. 



14. Pityophis sati Schl., subsp. mexicanus D. &B. Several specimens ; 

 Nos. 14222-66-93-94. 



15. Coluber emoryi B. & G. Five specimens, two with twenty-nine, 

 and three with twenty-seven rows of scales. Most of them have the 

 normal number of labial plates, eight ; but one has nine on one side, 

 and one has abnormally, ten on both sides. Nos. 14223-53-62-84-99. 



16. Bascanium: t^eniatum Hallow. One specimen ; No. 14272. 



17. Bascanium flagelliforme Catesby, subsp. testaceum Say. Three 

 specimens ; Nos. 14224-79-83. 



18. Eut^enia multimaculata Cope. Atomarchus multimaculatus Cope, 

 American Naturalist, 1883, p. 1300. 



The large numbers of this species taken by Mr. Wilkinson shows that 

 Central Chihuahua is its headquarters. The specimens display a remark- 

 able variability in coloration, and also prove that the azygOS plate which 

 exists between the prenasal plates of the typical specimen, is an ab- 

 normality. In one of the Chihuahua specimens there is an azygos plate 

 between the internasals, which is of shorter form than in the type ; while 



