2o8 NEW YORK STATE MUSEUM 



Chrysanthemum 

 Swollen stems, leaf stalks or deformed buds containing oval, frequently coa" 

 lescent cells with a length about 2 mm. PI. lo, fig. 4. Felt 'i6d, p. 51 

 Itonid. Chrysanthemum midge, Diarthronomyia hypogaea 



H. Lw. 

 Artemisia calif arnica 

 Irregular, lobulate, woolly masses apparently arising from lateral buds and 

 frequently confluent; individual galls with a diameter of about 4 mm. Fig. 

 240. Felt 'i6f, p. 195 



Itonid. Diarthronomyia floccosa Felt 

 Subconical, thin-walled, obliquely set, brownish or reddish leaf gall, length 1.5 

 mm, diameter .5 mm. Fig. 241. Felt 'i2J, p. 193 



Itonid. Diarthronomyia californica Felt 



Artemisia caudata 



Oval, woolly, apical or lateral bud galls, diameter i to 1.5 cm, consisting of a 

 series of oval cells with a length of about 2 mm and with numerous long fibers. 

 Felt '151, p. 272 



Itonid. Woolly wormwood gall, Rhopalomyia Palticola 



Ckll. 



A rtemisia forwoodii {.''canadensis) 

 Globular, woolly galls, diameter about i cm. Fig. 239. Felt '151, p. 272 



Itonid. Woolly wormwood gall, Rhopalomyia alticola Ckll 



Artemisia frigida 



Fusiform, flower or leaf bud galls, length 4 mm, also on A. f i 1 i f e r a . Fig. 

 242. Felt 'i5i, p. 238 



Itonid. Rhopalomyia betheliana Ckll. 



Artemisia gnaphalodes 



Irregular, lobulate, polythalamous, white, pubescent gall, diameter i cm. Felt 

 'iik, p. 484 



Itonid. Rhopalomyia gnaphalodis Felt 



A rtemisia heterophylla 



Ovate, thin-walled, oblique leaf galls, length i mm, also breeds in apparently 

 normal flower buds. Fig. 244. Felt 'i6f, p. 194 



Itonid. Diarthronomyia occidentalis Felt 



Artemisia species (wormwood) 

 Deformed flower heads, length 10 mm, diameter 5 to 6 mm. Felt 'i ij, p. 453 



Itonid. Wormwood flower midge, Rhopalomyia colora- 



della Ckll. 

 Bud galls, presumably. Felt 'i6d, p. 133 



Itonid. Asphondylia artemisiae Felt 



