118 PUPOIDES. 



New Mexico: near Las Vegas (Prof. Cockerell, Mary 

 Cooper) ; Rio Grande drift at Albuquerque (Ferriss & Pils- 

 bry) ; Grant (A. and J. Baily) ; Rio Grande drift at Mesilla 

 (Cockerell). Canones Creek east of Mt. Pederual, Coyote 

 Creek near Rio Puerco and Arroyo Agua and Rio Puerco, all 

 in Rio Arribo Co.; 14 miles north of Tucumcari (Walker). 



Arizona: Navajo Springs (Ashmun), Chinle Creek and 

 near Adamana, Apache Co. (Ferriss) ; Holbrook, Navajo Co. 

 (Ashmun) ; Antelope Valley and Finley's reservoir, near Mt. 

 Trumbull, Coconino Co. (Ferriss and Daniels) ; Verde River 

 near Jerome, Yavapai Co. (Ashmun) ; Ft. Grant, Final Co. 

 (G. H. Horn, type locality) ; San Pedro drift, near Benson, 

 Cochise Co. (Pilsbry) ; Ft. Defiance, in drift (Walker). 



5. PUPOIDES INORNATUS Vanatta. PL 12, fig. 10. 



Shell similar to P. hordaceus except that the upper part 

 tapers slightly more, and the surface is nearly smooth, with 

 some irregularly developed striae only, weaker near the suture. 



Length 3.6, diam. 1.6 mm. ; 5i/> whorls. Type. 



Length 3.4, diam. 1.57 mm.; 5y 2 whorls. Pike's Peak. 



South Dakota: drift of White River, Washington Co. (type 

 loc.), and Indian Creek, Pennington Co. (W. H. Over). 

 Colorado: Pike's Peak (E. Hall) ; Trinidad (Pilsbry) ; Round 

 Mountain, Custer Co. (Cockerell) ; Bellevue, Larimer Co. (J. 

 Henderson). New Mexico: Arroyo Pecos, near Las Vegas, 

 in ant hills, flood debris and in the "charcoal zone" (T. D. 

 A. Cockerell). 



Pupoides inornatus VAN., Nautilus, xxix, Dec. 1915, p. 95. 

 -f Pupa hordeacea Gabb, SAMPSON, Nautilus, vi, 1893, p. 102 

 (William's canyon, Manitou, Colo.). - - Pupoides hordaceus 

 (Gabb), PILSBRY and COCKERELL, Nautilus, xiv, 1900, p. 86. 

 J. HENDERSON, Univ. of Colo. Studies, iv, p. 170; ix, 1912, p. 

 57. --Pupa arizonensis var. nov. saxicola COCKERELL, Zoe, ii, 

 April, 1891, p. 18 (under rocks on Round Mountain, Custer 

 Co., Colorado). Not Pupa saxicola Lowe. 



In a considerable number seen, this form differs constantly 

 from P. hordaceus. It appears to be a species of the Rocky 

 Mountains, spreading eastward, while hordaceus ranges south- 

 westward, the areas overlapping at Las Vegas. 



