199. Southern species (east of Phoenix, Arizona); color usually grayish or 



with light bordered, dark stripes (Many species, of which a few rep' 

 rcsentatives arc given. For specific details see Pilsbry's Land Mollusca 

 of Klorth America.) 200. 



Shells native to the Pacific states (in the southwest, west of Phoenix, 

 Arizona) ; color usually, but not always, yellow to brown, dark banded 

 (Many species. See Pilsbry's Land Mollusca of 7<[orth America for 

 specific details.) 202. 



200. Umbilicus moderate, open; Sonora region (centering around Tucson, 



Arizona) Many species, of which this is representative) 

 Sonorella hachitana (Dall) Sonora Snail 

 Umbilicus narrow 201. 



201. Lowest dark band starting at the top of the aperture; Texas and New 



Mexico 



Humholdtiana ferrissiana Pilsbry 

 Lowest dark hand entering aperture; Florida to Texas 

 Praticolella griseola (Pfeilfer) 



202. Lowest dark band entering aperture; shell often angulate or keeled 



tAonadenia fidelis (Gray) 

 (Epiphragmophora fidelis (Gray) ) 

 Lowest dark band starting above the aperture; not keeled 203. 



203. Usually smooth shells; Gal. and Arizona west of Phoenix 



Micrarionta \elletti (Forbes) 

 (Epiphragmophora \elletti (Forbes) ) 

 Shells usually malleated, minutely granulated, or with fine hairs; Oregon 

 and Galifornia 204. 



204. Shells usually malleated; umbilicus small to absent 205. 

 Shells almost smooth or minutely granular; umbilicus moderate to 



small 206. 



205. Shell depressed 



Helminthoglypta (Helminthoglypta) tudiculata (Binney) 

 Shell almost as high as wide 



Helminthoglypta (Helminthoglypta) nic\liniana (Lea) 



206. Shell relatively smooth, much depressed; desert species 



Helminthogly pta (Helmintho gly pta) graniticola Berry 

 Shell minutely granular, moderately depressed; coastal species 

 Hehniyithoglypta (Charodotes) traskj (Newcomb) 



207. Shell approaching pupa'shaped, plain colored, with umbilicus small to 



absent; not over Vg" 208. 



Not so 212. 



208. With about six whorls; shell smooth; umbilicus minute or absent 209. 

 With about four whorls; shell striate or ribbed; umbilicus small 210. 



209. Height usually about the same as width; surface glossy; generally dis' 



tributed, except for the southeastern U. S. 

 Euconidus fulvus (Miiller) Beehive 



137 



