ERRATA. 

Some typographical and clerical errors having crept into 
the first part of this Monograph the student is requested to 
make the following changes: 
Page 
Page 
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224, b’, for cylindrical read elliptical. 
225, line 7, for absolutely read obsoletely. 
237, after description of C¢. z¢mmermannz, add, Habitat. 
Southern States. 
239, lines 14 and 15 should read, Habitat. Western slope 
of the Sierra Nevada. Montana. (Wickham). 
242, line 6, after Habitat, add, Mississippi Valley, 
south of 36°. 
266, last line, for Sauley read Saulcy. 
268, II, for wide read nude. 
271, line 2, for front read fourth. 
271, line 12, for albcnica read albionica. 
294, line 6, for impunctuate read impunctate. 
294, line 17, for TRIGMA read TRIGONA. 
In the explanation of Plate VI., Figs. 13 and 15 are trans- 
posed; read therefore: 
Fig. 13, Chennium (Adznus) meonilicorne. 
Fig. 15, Zmestphorus costalis. 
