ERRATA. 
Page 10, line 21 from bottom, for two read several. 
Page 16, line 20, from bottom, for Anthomyia zece, Riley, read Phorbia fuscipes, Zett. 
Much additional information concerning this species has been lately published in 
Bulletin 78 of the Cornell University Experiment Station, Nov., 1891, p. 499. 
Page 25, line 15, for Packard read Peck. 
Page 121, line 3, for gibbos read gibbosa. 7 :> f 
Page 135, lines 20 and-^Ushou 1 d precede line 8 from bottom of page 134. 
Page 139, line 13 from bottom, for pruina read prunina. 
Page 141, line 15 from bottom, for glacilis read gracilis. 
