336 NEW YORK STATE MUSEUM 



and- by. the antcnnal segments being almost invariably stalked 

 in the males. 



A large number of forms arc 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 browMi 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 deca3nng vegetable 

 matter. The peculiar, synthetic D i a r t h r o n o m y i a a r t e - 

 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, 31428 



.Agrostis 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. 



Anemdne canadense 



Lciose hud gall Dasyneura anemone, 31522 



Artemisia tridentata (sage bush) 

 Stem ? gall D i a r t h r o n o m y i a a r t e m i s i a e , C. 989 



Cephalanthus (button bush) 

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



Clematis virginiana (virgin's bower) 

 Oval stem gall Dasyneura c I e m a t i d i s , 31659 



Corylus (hazel) 

 1 lairy kaf fold Dasyneura c o r y 1 i , 31543 



