PLATE XXIX. 



TrOOHILIUM MYOP2BFORME. 



1, larva before last moult; 1 a, after last moult; 

 1 b 9 pupa ; 1 c, 1 d, pieces of apple-bark ravaged by 

 the larva. 



See pp. 128, 129. 



Troohilium culioiforme. 



2, larva after last moult. 



See p. 129. 



Troohilium formio^iforme. 



3, larva after last moult burrowing in stem of osier. 



See p. 129. 



Troohilium philanthiforme. 



4, larva after last moult ; 4 a, 4 b 9 tufts of thrift 

 (Statice armeria) burrowed by the larva; 4 b, showing 

 the long tubular gallery in which the pupa is con- 

 tained. 



See pp. 50—52. 



