THE NAUTILUS. A 
181. SrroprLops vrrGo (Pils.). Canada to Northern Alabama 
and west to Minnesota and Kansas. 
182. SrropiLors AFFINIS Pils. New York, Ohio, ete. 
183. SrRoBILops HUBBARDI (Brown). Calhoun Co., Texas; 
Savannah, Ga.; Eastern and Northern Florida. Also Jamaica. 
Genus LEUCOCHEILA Martens. 
184. LeucocHEILA FALLAX (Say). Prov. Ontario, Canada, to 
Florida, and west to Minnesota, Texas and Arizona. 
185. LeucocueiLa monica (Gld.). St. Simon’s Island, Ga. to 
Florida; west to Cedar Keys and Ala. 
Genus BIFIDARIA Sterki, 1891. 
Section A/lbinula Sterki. 
186. BirmARIA ARMIFERA Say. Ontario and Quebec, Canada, 
and nearly the whole U.S. east of the Rocky Mts. 
187. BiripARIA conrRAcTA Say. Ontario, Canada, and the 
whole U.S. east of the Rocky Mts.; eastern Mexico. 
188. BrrrpaRfA HOLZINGERI Sterki. St. Cloud, Minn., Iowa, 
S. to Wichita, Kansas and Joliet, Will Co., Il. 
188a. BirIDARIA HOLZINGERI FORDYANA Sterki. Wichita, 
Kansas. 
Section Bijidaria s. str. 
189. BrripARIA HORDEACEA Gabb. Arizona, New Mexico. 
190. Bremparia PROCERA Gld. Minnesota to New Mexico, and 
eastward. 
191. BrripARIA HORDEACELLA Pils. Comal and Lee Counties, 
Texas; New Mexico. 
192. Brrrmparta RUPICOLA Say. Kansas and New York south- 
ward to Texas and Key West, Florida. 
1938. Brerparia servilis Gld. Florida; Cuba. 
(An undescribed form of this group has been called P. riogrand- 
ensis Sterki. Hidalgo, Texas). 
194. BiripDARIA CORTICARIA (Say). Ontario and Maine to 
Minnesota, south to South Carolina and Mississippi. 
195. BrrrpArtA HEBES Ancey. New Mexico, Arizona, Nevada 
and Utah; type locality White Pine, Nevada. This is P. arizonensis 
W.G. B., not Gabb, and P. gabbi Dall. A form saxicola’ Ckll. has 
Not Pupa saxicola Lowe nor P. saxicola Moq.-Tand. 
