22 PROCEEDINGS OF THE ACADEMY OF [1883. 



They differ in the number of rows of scales, however, one having 

 twenty4hree and the other twenty-two. All the rows of scales 

 keeled, the median ones very strongly. Labials eight, the eye 

 i-esting on the fourth and fifth. Two preoculars ; three post- 

 oculars. The muzzle is rather short, the frontal plate exceeding 

 in length the region anterior to it, and equaling the common 

 suture of the parietal scuta. Nasals rather short ; loreal as long 

 as high ; inferior preocular nearly square ; superior preocular not 

 reaching frontal. Superior labials all truncate above and none of 

 them elevated, the sixth touching the inferior postorbital. Tem- 

 l)orals, 1 • 2 • 3 ; the anterior are rather large. Pairs of geneials 

 subequal. Gastrosteges, 156 ; urosteges, 19. 



Color everj'^where black, except on the chin and throat, and on 

 the inferior side of the tail. The former was reddish in life. 

 There are very faint traces of stripes on the third and fourth, and 

 on the median dorsal rows of scales. No traces of spots on the 

 parietal scuta. 



Total length, m. 0-265; length to canthus of mouth (axial), 

 •012; length of tail, -062. 



This species is one of the best characterized of the genus. Its 

 leading peculiarities are : first, the two preocular scuta; second, 

 its twenty-three rows of scales. In both respects it is unique in 

 the genus. Its color is characteristic. Its place is nearest the 

 E. radix B. and G., with which it agrees in its rather robust 

 proportions, and the position of the lateral stripe. 



This species is not uncommon in the swamp vegetation on the 

 borders of the lake. The specimens I took displayed little 

 activity. 



Crotalus confluentus lucifer B. and G. 



This species is abundant at Warner's second Lake, and I took 

 one at Silver Lake. The specimens are identical with those from 

 near Pyramid Lake, Nevada. 



11. The WiLLAMET Valley, Oregon. 



The fauna of this valley is that of western Oregon, and may 

 be expected to differ from that of central and eastern Oregon. 

 The climate of the Willamet Valley is very wet, and the soil is 

 densely covered with forests. This is a state of things almost 

 exactly the reverse of what obtains in central Oregon. Appro- 

 priately we have numerous species of salamanders and fewer 



