134 NEW YORK STATE MUSEUM 



Two gall midges produce bud galls on Antennaria 

 plantaginifolia. Rhopalomyia antennariae 



inhabits a corm-shaped bud gall one-third to one-half of an inch in 

 diameter. The sessile leaves surrounding this are somewhat suc- 

 culent, broader and longer than norm.al, the tips being somewhat 

 recurved and closely applied to one another like the leaves on onions. 

 Both surfaces of the component leaves are covered with a woolly 

 growth and there is m.ore or less of a reddish discoloration. Fre- 

 quently all the terminal buds of a plant, even a dozen or so, may 

 become infested, the galls forming a cluster somewhat resembling 

 a bunch of young hazelnuts. 



The Asphondylia, according to Doctor Wheeler, produces a gall 

 easily confused with that made by the Rhopalomyia. This gall is 

 more elongate and the tips of the component leaves are scarcely 

 recurved. The woolly growth on the under surface of the leaf is 

 more regular, giving it a satiny appearance, while the upper surface 

 is smooth. There is none of the reddish discoloration and but one 

 insect occurs in a gall, occupying a smooth cavity with hard nutlike 

 walls. The galls of Asphondylia may occur on the same plant with 

 those of Rhopalomyia and even in the same cluster. The insect 

 evidently hibernates in the gall, the adult emerging from its apex 

 and appearing in the latitude of Wisconsin from about the 17 th to 

 the 20th of May. A parasite, Synopeas antennariae 

 Ashm., was reared from this species May 31, 1888. 



Male. Length 2.75 to 3 mm, the mesonotum and scutellum 

 darker than in the female, the latter with numerous yellowish setae 

 apically (markedly more than in the female), 'the abdomen dor- 

 sally with rather conspicuous lateral stripes rather thickly clothed with 

 silvery white hairs, the terminal clasp segment of the genitalia 

 apparently very broad, curved, the tip bidentate. Described from 

 types in the American Museum of Natural History. 



The description following is based on a specimen reared from 

 material sent to Washington, D. C, by Doctor Wheeler in May 1888 

 and bearing the United States National Museum number 4288. 



Female. Length 3.5 mm. Antennae about as long as the body, 

 rather thickly fine haired, brown; 14 segments, the third with a 

 length about five times its diameter. Palpi; the first segment short, 

 stout, irregularly oval, the second stout, with a length about two 

 and one-half times its diameter, the third slender, considerably 

 swollen near the distal fourth, about twice the length of the pre- 

 ceding. Mesonotum dark brown, the submedian lines fuscous 

 orange, rather thickly clothed with pale setae. Scutellum dark 

 brown with numerous coarse setae apically, postscutellum yellowish. 

 Abdomen brown, rather thickly clothed laterally with grayish setae, 

 thickly so ventrally; basal pouch dark brown. Wings hyaline, costa 



