ERRATA ET CORRIGENDA. 
for serverint read severint. 
for P. read H. 
for P. read 7. 
for E. read AZ, 
for 23,39 read 29,36. 
for flavescens read flavicans. 
for Z. taurus and Z, flavicans read KR. taurus and R. flavicans. 
Erase the second footnote. 
for “a single species from Mexico, which is now known” read 
“two species, the one from Mexico being now known.” 
for “ With one exception, all” read All. 
for S. andinus read S. andina. 
