336 NEW YORK STATE MUSEUM 



and by the antennal segments being almost invariably stalked 

 in the males. 



A large number of forms are referable to this group, the 

 two important genera being Dasyneura and Rhabdophaga. The 

 former are medium sized, usually brownish or yellowish. The 

 insects breed very largely in leaf folds, leaf buds or loose leafy 

 bud galls. The genus . Rhabdophaga comprises a number of 

 larger, usually reddish or reddish brown forms, which display 

 a marked preference for woody tissues, a considerable number 

 of species living in willow galls. The genus Arnoldia repre- 

 sents a number of forms having 12 segmented antennae. One 

 form breeds in the^ tumid vitis gall on grape, while several others 

 which were reared probably came from decaying vegetable 

 matter. The peculiar, synthetic Diarthronomyia arte- 

 m i s i a e is a western form and was reared from galls on sage 

 bush. 



HOST PLANTS AND GALLS OF DASYNEURIARIAE 



Abies (spruce) 

 Seeds Dasyneura canadensis, 3.1428 



i^grostis vulgaris (Red top or June grass) 

 Ovipositing on Dasyneura g r a m i n i s , C. 1209 



Alnus (alder) 

 Bud gall Dasyneura s e r r u 1 a t a e O. S. 



Anemone canadense 



Loose bud gall Dasyneura anemone, ai522 



Artemisia tridentata (sage bush) 

 Stem ? gall Diarthronomyia a r t e m i s i a c , C. 989 



Cephalanthus (button bush) 

 Twij; gall ...Rhabdophaga c e p h a 1 a n t h i , C. 1048 



Clematis virginiana (virgin's bower) 

 0\ al stem gall Dasyneura 1 c m a t i d i s , a 1650 



Corylus (hazel) 

 Hairy leaf fold Dasyneura c o r y 1 i , ai543 



