REPORT OF THE STATE ENTOMOLOGIST I907 357 



Aster 



Dwarf flower heads on A. paniculata 



Rhopalomyia asteriflorae C. ai757 



Axillary bud galls on A. lateriflorus..~ 



Rhopalomyia lateriflori, C. ai73i 

 Oval twig gall on A. novae-angliae 



Rhopalomyia astericaulis, C. 1107a 



Audibertia stachyoides 



Gall undescribed Rhopalomyia audibertiae, C. 1029 



Baccharis pilularis 



Flower gall ...Rhopalomyia californica, C. 1003, 983, 984 



Stem gall Rhopalomyia baccharis, C. 982 



Betula (birch) 

 Bred from seeds Oligotrophus betulae Winn. 



Bigelovia 



Hollow, stem gall Rhopalomyia bigeloviae, C. 1070 



Oval seed gall Rhopalomyia bigelovioides, C. 940 



Celtis (hackberry) 

 Leaves Mayetiola celtiphyllia, C. 913, 918 



Comptonia (sweetfern) 

 Fleshy leaf fold Janetiella asplenifolia, C. 1103 



Gutierrezia sarothrae 



Oval swelling in flower heads 



Rhopalomyia gutierrezia e, C. ai742 



Hordeum (barley) 

 Leaf sheaths Mayetiola destructor, C. 771. ']'J2 



Juniperinus californica (juniper) 

 Galled fruit Walsh o m yia juniperina, C. 1049 



Ribes (currant) 



Mayetiola californica, C. 919 



Salix (willow) 



Apical rosette gall Mayetiola w a 1 s h i i , C. 774 



Apical beak gall Mayetiola rigidae, C. a687 



Slender twigs Mayetiola caulicola, C. ai822a 



Subglobose galls on slender twigs Mayetiola tumidosae, C. 1300 



Stems Mayetiola perocculta, C. 1251 



Mayetiola americana, C. 920 



