A small number of inconsistencies and typographical errors have been
changed in the text as follows:
p. 279 "near-by" changed to "nearby" (in nearby counties of Kansas)
p. 289 "successivly" changed to "successively" (two successively older
annual age classes)
p. 297 "per cent" changed to "percent" (only 48 percent of specimens from
the Florida keys)
p. 303 "famliy" changed to "family" (the northern limits of the species,
genus, and family.)