Errata 

 Page 33: Footnote 16, drift should read drifts . 

 Page 93: Line 11, p. 92 should read p. 96. 



Page 239: Under the heading "Halithalestris croni 

 (Kroyer) , paragraph 1, line 4, tables, 

 P« 207 should read t ables, p. 29 71 



Page 267: Last line before table, p. 298 should 

 read p. 297 . 



Page 330: Legend for Figure 92, contou r should read 

 contours. " 



