160 



NORTH AMERICAN FAUNA. 



[No. 7. 



directions. The present report does not pretend to exhaust this mate- 

 rial, which will yield more definite results when the adjoining territory 

 shall have been searched as thoroughly and as intelligently as that 

 covered by the present expedition. 



With a material so well calculated to show the amount of individual 

 variation within many species, and to determine the geographical dis- 

 tribution of others, the author was enabled to settle many a vexed 

 question and to point out many a nice distinction where some of his 

 colleagues had failed, chiefly from lack of suitable material. If, there- 

 fore, he has succeeded in somewhat advancing our knowledge of North 

 American herpetology, thanks are principally due to Dr. 0. Hart Mer- 

 riam, the untiring organizer and leader of the expedition, and to the 

 zeal and intelligence of his assistants who evidently spared no effort 

 to make the expedition a success. Personally I have to thank Dr. Mer- 

 riam for the privilege of working up such a valuable and interesting 

 material. 



Dr. Merriam has contributed field notes on many of the species, with 

 special reference to geographic distribution and food habits. These 

 notes are given in brackets over his initials at the end of the text 

 relating to each species. 



LIST OF SPECIES. 



A. REFTILIA. 



I.— TESTUDINES. 



Testudinid^;. 

 1. Gopherus agassizii (Cooper). 2. Clemmys marniorata (B. & G.). 



II.— SQUAMATA. 

 1. Sauri. 



EUBLEPHARID^E. HeLODERMATIDjE. 



3. Coleonyx variegatus (Baird). 



Iguanid^e. 



4. Dipsosaurus dorsalis (B. & G). 



5. Crotaphytus bailey i Sfcejn. 



6. Crotaphytus wislizenii B. & G. 



7. Crotaphytus silus Stejn. 



8. Callisaurus ventralis (Hallow.). 



9. Sauromalus ater Dum. 



10. TJta stansburiana B. & G. 



11. Uta graciosa (Hallow.). 



12. Sceloporus magister Hallow. 



13. Sceloporus graciosus B. & G. 



14. Sceloporus bi-seriatus Hallow. 



15. Sceloporus occidentalis B. & G. 



16. Phrynosorna blainvillii Gray. 



17. Phrynosorna platyrhinos Girard. 



18. Heloderrna suspectum Cope. 



Anguidje. 



19. Gerrhonotus scincicauda (Skil- 



ton). 



20. Gerrhonotus scincicauda palmeri 



Stejn. 



21. Gerrhonotus burnettii Gray. 



XANTUSIIDiE. 



22. Xantusia vigilis Baird. 



TEJIDiE. 



23. Cnemidophorus tigris B. & G. 



24. Cnemidophorus tigris undulatus 



(Hallow.). 



