TORTRICES IN THE VICINITY OF THE CHESHAM LINE. 91 



is not far distant as the crow flies, and it has produced several 

 good Tortrices. 



The following is a list of the species I have met with during 

 sundry visits to the various places ; but, with the exception of 

 Mill Hill, I have rarely spent more than an afternoon at a time 

 at any one locality. It is therefore highly probable that many 

 more species would be found by more diligent working. 



Tortrix podana, Scop. = pyrastrana, Hiibn. (Lozotcenia ful- 

 vana, Wilk. Brit. Tort., 1859; Staint. Manual, ii. 1859. Caccecia 

 podana, Meyrick, Handb. Brit. Lep., 1896). — Widely distributed. 

 The unicolorous form known as var. fuscana, St., occurs more 

 frequently than the type in St. John's Wood. I have seen 

 frequent instances of " assembling " in this species. 



Tortrix xylosteana, Linn. (Lozotcenia xylosteana, Wilk. 

 Staint. Caccecia xylosteana, Mey.). — A generally common and 

 variable species. 



Tortrix sorbiana, Hiibn. {Lozotcenia sorbiana, Wilk.; Staint. 

 Caccecia sorbiana, Mey.). — I have only obtained this species at 

 Northwood, but it does not seem to be very plentiful. 



Tortrix rosana, Linn. (Lozotcsnia rosana, Wilk. ; Staint. 

 Caccecia rosana, Mey.). — A very common species throughout the 

 whole area. 



Tortrix diversana, Hiibn. {Tortrix transitana, Wilk. ; Staint. 

 Tortrix diversana, Mey.). — This species has sometimes occurred 

 in profusion at Mill Hill and Kingsbury. It seemed to affect 

 particular elm trees. 



Tortrix heparana, Schiff. (Tortrix heparana, Wilk. ; Staint. 

 Pandemis heparana, Mey.). — Generally common, especially in 

 the larval state. 



Tortrix ribeana, Hiibn. (Tortrix ribeana, Wilk. ; Staint. 

 Pandemis ribeana, Mey.). — Also common, more particularly in 

 fruit gardens. 



Tortrix corylana, Fabr. ('Tortrix corylana, Wilk. ; Staint. 

 Pandemis corylana, Mey.). — I have only seen this species at 

 Northwood. 



Tortrix unifasciana, Dup. (Lozotcenia unifasciana, Wilk. ; 

 Staint. Caccecia unifasciana, Mey.). — Common almost every- 

 where. 



Tortrix palleana, Hiibn. (Tortrix icterana, Wilk. ; Staint. 

 Tortrix paleana, Mey.). — Larvae often abundant in meadows 

 at Mill Hill, Kingsbury, Harrow, Northwood, and Bickmansworth. 

 The perfect insect is not so commonly in evidence. 



Tortrix virldana, Linn. (Tortrix viridana, W ilk. ; Staint.; 

 Mey.). — Generally abundant. 



Tortrix forsterana, Fabr. (Tortrix forstcrana, Wilk. ; 



