156 Rowland M. Shelley 



NEBRASKA: West Point, Roca, Rulo, and LaPlatte, cited as L. 

 floriaius (Kenyon 1893«) and L. floridus (Kenyon 18936). Shelley 

 (1989) synonymized this usage of L. floridus with E. mundus. 



GEORGIA: Ft. Benning (Chamberlin 1951). As noted by Shelley 

 (1990), this record is a misidentification of Oxidus gracilis (Koch). 



ILLINOIS: Union Co., Rich's Cave near Cobden (Causey 1952). 

 As this site is along the Mississippi River in southern Illinois, far 

 from the range of S. placidus, this record of a juvenile surely refers 

 to another xystodesmid. 



Remarks — As noted by Shelley (1990), the northern- and western- 

 most record of S. placidus is that from Rice County, Minnesota, and 

 the southern- and eastern-most are in Botetourt and Madison counties, 

 Virginia, respectively. These records span a distance of some 858 mi 

 (1,381 km) in the east-west dimension and 429 mi (688 km) in the 

 north-south. The Monroe County, eastern Ohio record, shown by a 

 dot in figures 1 and 69, was obtained since my 1990 paper and lies 

 nearly midway between the central and eastern faunal areas. This 

 record may indicate the existence of a small additional population 

 along the northern/western side of the Ohio River. 



In addition to the narrower body, females of S. placidus can be 

 distinguished from ones of other eastern taxa by the hirsute receptacle, 

 as this cyphopodal structure is glabrous in the other eastern tribes. 



Genus Montaphe Chamberlin 

 Montaphe Chamberlin, 1949:127. Chamberlin and Hoffman, 1958:38. 



Jeekel, 1971:273. Hoffman, 1979:157. Kevan, 1983:2968. 



Type species — Leptodesmus (Chonaphe) elrodi Chamberlin, 1913, 

 by original designation. - 



Diagnosis — Paranota present and distinct on all segments; epiproct 

 without constriction; gonocoxae narrowly segregated by narrow sternal 

 band, latter either with two paramedian lobes adjacent to coxae or 

 single, broad, central lobe; telopodal elements parallel or subparallel 

 for most of lengths, arising proximad on prefemur; prefemoral process 

 variable, either long, extending well beyond acropodal loop, and narrowly 

 blade-like, with strong distal barbules and a broad projection proximal 

 to midlength, or short, terminating inside acropodal loop, and apically 

 expanded and deeply divided; acropodite narrowly blade-like basally, 

 acicular to subacicular distad, typically looping over prefemoral process, 

 either without projections or expanding basally and with lateral spiniform 

 projection; cyphopods with medial valves expanding gently to strongly 

 ventrad, constituting at most only short lobes, subtending at most 

 only moderate central cavity. 



