272 



NEW YORK STATE MUSEUM 



European Rhopalomyia artemisiae Bouche on Arte- 

 misia campestris, namely an oval bud enlargement. Doctor 

 Rubsaamen states that he received galls and flies from Herr Doctor 

 Von Schlechtendal of Halle. There is a gall in the Museum of 

 Comparative Zoology from California which may be referable to 

 this species. 



Rhopalomyia grossulariae Felt 



91 



Felt, E. P. Econ. Ent. Jour., 4: 347 



This was reared from deformed gooseberry buds in May 191 1 by 

 J. S. Houser of the Ohio Agricultural Experiment Station. The 

 material was collected at Camp Chase. It approaches in antennal 

 characters the North American Rhopalomyia tridentatae 

 Rubs, reared from Artemisia, though it is easily distinguished by 

 the uniarticulate palpi. 



Rhopalomyia alticola Ckll. 



1890 Cockerell, T. D. A. Ent., p. 281 (Cecidomyia) 



1895 Baker, C. F. Ent. News, 6: 173 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 367 



This species produces a globular woolly gall on the 

 branches of Artemisia in Colorado. The following 

 descriptions of the adult and gall have been drafted 

 from material kindly put at our disposal by Prof. 

 T. D. A. Cockerell December 17, 1906, the imagoes 

 appearing the middle of the following January. 



Gall. The gall is subglobular, grayish, woolly, rang- 

 ing in diameter from .7 to 1.5 cm. Each is composed 

 of a number of hard, thin walled, narrowly oval cells 

 thickly covered with cottony matter and surrounded 

 with small bracts, the latter also thickly clothed with 

 white down. 



Male. Length 2.5 mm. Antennae extending to the 

 third abdominal segment, sparsely haired, reddish 

 brown, 16 or tj segments; the fifth with a stem one- 

 third the length of the vasiform enlargement. 

 Palpi uniarticulate, the segment long, slender. 

 brown, mesonotum dark brown, suhmedian lines \u 



ently slightly elevated, sparsely clothed with fine Ik 



mostly Light reddish, seutellinn and postsenlellnm 





Fig. 85 Rho- 

 p a 1 m y i ,1 

 alticola; 

 gall nearly 

 natural size 

 (original) 



Face fuscous 



scous, appar- 



hrs. Pleurae 



dark brown, 



