76 XANTHIA FLAVAG0. 



Xanthia FLAVAGO. 



Plate LXXXIV, fig. 6. 



[See under X. cerago for Mr. Buckler's ' Comparative 

 Notes on the Larvae of Xanthia cerago and silago,' 

 published in E.M.M., VI, 262, April, 1870.] 



Xanthia gilvago. 

 Plate LXXXV, fig. 1. 



I feel greatly obliged to the Rev. J. Hellins, Mr. 

 Albert Jones, and Mr. George Baker, of Derby, for 

 their kindness in giving me this season the opportunity 

 of figuring and describing the larva of this species, and 

 also that of X. ferruginea ; and especially to Mr. Baker 

 for his caution that the latter species might be amongst 

 the larvae of the former, otherwise I might have kept 

 them together and been defeated. 



But the extra trouble of figuring and keeping each 

 larva separate has been rewarded, as it has enabled 

 me to point out the distinction between two very 

 similar larvae that may be easily mistaken for each 

 other. The quotation from Guenee in the ' Manual ' 

 says of X. gilvago — " larva undescribed, because so 

 common " ; a passage I never fully comprehended 

 until recently. 



Both species of larvae, obtained from seeds of wych- 

 elm, were sent me as X. gilvago, from 6th to 8th of 

 June, within a few days or a week of their being full- 

 fed, and the perfect insects appeared from August 24th 

 to September 5th. 



The larva of X. gilvago, when full-grown, is about 

 one inch or an inch and one-eighth in length, rather 

 thick and plump behind, tapering a little gradually 

 towards the head, and a little just at the anal segment. 



