SCIENTIFIC EXPEDITION TO NORTHWESTERN COLORADO I3I 



Amblystomid^e (Salamanders) 

 Amblystoma tigrinum Green. Meeker, August 16 (A. H. Felger). 



Colubrime (Water Snakes 2 ) 



Thamnophis elegans (Baird and Girard). Meeker and Buford, all with 21 rows 

 of scales and eight upper labials. The Buford specimens are very dark with the 

 lateral pale bands obsolete. 



A series of immature specimens puzzled me at first, being conspicuously spotted 

 and rather peculiar in appearance. They all have 21 rows of scales and eight upper 

 labials, except that the Buford specimen has only seven upper labials on one side. 

 In every case, there is only one preocular. The lateral stripes are usually ill defined, 

 but whenever clearly visible, they are on the second and third rows of scales. A 

 noticeable character, more or less visible in all, is a pair of small yellowish spots, 

 close together, on the parietals. The snake from three miles south of Axial has a 

 divided anal, which would throw it out of Thamnophis according to the current 

 diagnosis of that genus; but the specimen from reservoir of Curtis Creek, with entire 

 anal, is certainly the same thing. The others also have the anal entire. 



The localities of these snakes are: Reservoir of Curtis Creek, seven miles northeast 

 of Meeker, August 12 (Felger); three miles south of Axial, August 14 (Felger); 

 Buford, August 20 (T. Duce); slough on White River, three miles above Meeker, 

 August 17 (T. Duce). 



Thamnophis sirtalis parietalis (Say). Buford, August 23; 17 rows of scales; 

 seven upper labials. Mr. A. H. Felger notes that the snake contained two rodents. 

 One of these was still good enough to make a skin, and proves to be Microtus nanus 

 Merriam. Another specimen (17 rows of scales, seven upper labials, one preocular) 

 is from Meeker, August 9 (Felger). 



Iguanid^e (Lizards) 



Crotaphytus collaris baileyi (Stejneger). One specimen; femoral pores 18. 

 Rifle Gap, Garfield Co., August 5 (A. H. Felger). New to Colorado. Ditmars, in 

 his Reptile Book, ignores baileyi, and yet gives measurements of collaris which exclude 

 it; consequently it cannot be determined from his book. 



Sceloporus undulatus (Latreille). A dark specimen. Meeker, August 10 

 (A. H. Felger); four miles west of Meeker, August n (Henderson and Duce). 



Phrynosoma hernandesi (Girard). Two miles southeast of Meeker, August 8 

 (W. W. Robbins); Meeker, August 10, a juvenile (A. H. Felger). 



It is worth while to record that we have a young specimen of Tropidonotus sipedon (L.), found at Boulder 

 by Sidney Searcy. This appears to be an addition to the Colorado fauna. We also have Ophibolus doliatus 

 gentilis B. and G., found near Boulder by V. E Metcalf, July 22, 1904. 



