214 



NEW YORK STATE MUSEUM 



This species was reared September 24, 1908 from oval swellings 

 on the leaves of an aster collected at Magnolia, Mass., by Mrs 

 H. M. Tower. 



Gall. The gall (pi. 4, fig. 2) from which this species was reared 

 is simply an oval, green swelling about 2 mm long and 1.5 mm in 

 diameter on the under side of a blue-flowered aster having rough, 

 cordate leaves. There is no discoloration of the injured tissues. 

 Male. Length 1.75 mm. Antennae dark brown; 14 segments, 

 the fifth with a length one-half greater than the diameter; face 

 yellowish. Mesonotum shining dark brown, the submedian lines 

 thickly clothed with yellowish scales. Scutellum 

 dark brown with numerous setae apically, post- 

 scut ellum dark orange. Abdomen mostly deep 

 orange, the dorsal sclerites of segments one to 

 five sparsely clothed with dark brown scales 

 and scatteringly margined with silvery scales, the 

 distal segments nearly naked. Genitalia fuscous 

 yellowish; venter mostly pale yellowish, the distal 

 segments deep orange, all sparsely clothed with 

 silvery scales. Wings hyaline, the third vein 

 uniting with costa at the basal half; halteres 

 and coxae pale yellowish, the femora distally, 

 tibiae and tarsi dark brown. Genitalia; basal 

 clasp segment stout, terminal clasp segment stout 

 at base; dorsal plate long, broad, broadly and 

 triangularly emarginate; ventral plate short, 

 broad, narrowly rounded. Harpes subtriangular, 

 irregular, dentate. 



Female. Length 2 mm. Antennae with 15 



segments, the fifth with a length one-third 



greater than its diameter, the 1.5th compound. 



Mesonotum dark brown, the submedian lines 



Scutellum dark brown with sparse, whitish 



Fig. 41. Aster- 

 omyia vesi- 

 culosa, fifth 

 and sixth anten- 

 nal segments of 

 male, enlarged 

 (original) 



Palpi uniarticulate. 

 thickly yellow-haired, 

 setae apically, postscutellum dark orange. Abdomen dark brown 

 with small, narrowly lunate, silvery submedian spots, those on 

 the fifth and sixth segments nearly confluent, each segment 

 laterally with a subtriangular, whitish spot near the posterior 

 margin. Ovipositor pale orange; venter suffused with silvery scales. 

 Wings about as in the male, the white discal spot larger. Halteres 

 pale orange basally, fuscous yellowish distally. Coxae fuscous 

 yellowish; femora basally yellowish, the distal portion of femora, 

 tibiae and tarsi dark brown, almost black. Ovipositor short, the 

 lobes broadly oval. Type Cecid. a 1884. 



Asteromyia chrysothamni n. sp. 

 This species was reared from a narrow leaflet of Chrysothamnus 

 collected by Mr E. Bethel near Boulder, Col., and transmitted by 

 Prof. T. D. A. Cockerell under date of June 30, 1910. It was also 



