128 



NEW YORK STATE MUSEUM 



the peculiar though widely distributed adherent type of gall which 

 consists of a slight thickening and elevation of the apposed surfaces 



Fig. i6 Asphondylia monacha. a, breastbone of larva; b, cephalic 

 horns of pupa, enlarged (original) 



of two leaves. The hyper- 

 trophid tissues adhere 

 around an oval cell some 

 2 mm in diameter and 

 hold the leaves together 

 even after the normal 

 development of the stalk 

 has separated their bases 

 by an inch or more. We 

 have reared this species 

 from apparently unmodi- 

 fied Solidago florets, the 

 chaff of the flowers being 

 wanting, and also from 

 a purplish green gall in 

 the leaf axil of an aster 

 and from arrested aster 



^^'-'■^- Fig. 17 Asphondylia monacha. Dor- 



sal aspect of distal abdominal segments of ex- 

 uvium, enlarged (original) 



