Vm PREFACE. 



Besides these, the following' species had better be regarded 



as recorded in error, until confirmed by further undoubted 



specimens : — 



Sesia apiformis, 



Nola strigula, 



Emmelesia taeniata, 



Phibalapteryx polygrammata, 



Hadena genistae. 

 Deleting- these fifteen species will leave a net addition of 

 thirty-eight to the original list, or a total of 1379 for 

 Yorkshire. 



The new localities have largely increased our knowledge 

 of the distribution of many species in our county; and the 

 "light" traps used so S3'stematically at Everingham by 

 Mr. J. Sumner have also proved that many species which we 

 formerly considered to be rare, are in reality quite common. 

 This method of capture had never been much worked in 

 Yorkshire until Mr. Sumner adopted it, and as it immediately 

 proved an irresistible attraction to many species which were 

 formerly comparatively seldom taken, the inference is, that 

 the same method of work would be equally successful in 

 other districts. When it is seen that such species as Lithosia 

 complanula, Pcecilocampa populi, Notodonia dictceoides, 

 Liiperina cespitis, Tceniocavipa opima, Cirrcedia xermnpeUna, 

 Petasia casshiea, Pericallia syringaria, Ennomos angnlaria, 

 Nyssia hispidaria^ Amphydasis prodro?7iaria, Titnandra ama- 

 taria, Melanippe unangtilata, and many others, were taken 

 in abundance in the traps by Mr. Sumner, it will be at once 

 realised what a valuable adjunct this method of capture may 

 be made. Perhaps it is fortunate too that nearly all the 

 specimens taken at "light" are males, as the females are thus- 

 left to deposit their eggs, and to perpetuate their species. 

 Why the females should fail to be attracted, except in. 

 comparatively rare instances, is not easily accounted for,, 

 but such is the case. 



Trans. Y.N.U. Series D, Vol. 2. Dec. 1903. 



