REPORT OF THE STATE ENTOMOLOGIST I918 189 



Itonida apocyni Felt 



1908 Felt, E. P. N. Y, State Mus. Bui. 124, p. 414 (Cecidomyia) 

 191 8 N. Y. State Mus. Bui. 200, p. 180 



This reddish 3^ellow male was reared August 21, 1906 from 

 unopened, apparently normal blossoms of the spreading dogbane, 

 Apocynum andromaesifolium, taken at Nassau, N. Y. 



Male. Length 1.5 mm. Antennae one-half longer than the body, 

 thickly haired, pale yellowish; foiu-teen segments, the fifth with 

 stems three and four times their diameters; terminal segment, distal 

 node with a length three times its diameter, subcylindric, tapering, 

 apically with a long, slender, tapering appendage. Palpi; the first 

 segment short, subcylindric, with a length one-half greater than its 

 diameter, the second segment with a length four times its diameter, 

 the third a little longer and the fourth a little longer and more slender 

 than the third. Mesonotum a light fuscous, the submedian lines 

 sparsely haired. Scutellum yellowish; abdomen reddish yellow. 

 Wings hyaline, costa yellowish; halteres pale yellowish. Coxae red- 

 dish yellow, femora and tibiae yellowish, the tarsi darker; claws long, 

 slender, evenly curved, the pulvilli rudimentary, about one-third 

 the length of the claws. Genitalia; dorsal plate short, broad, deeply 

 and triangularly incised, the lobes well separated, broadly and 

 roundly emarginate, the lateral angles produced, they and the 

 internal angles each bearing stout setae; ventral plate long, broad, 

 deeply and roundly emarginate, the lobes tapering slightly, narrowly 

 rounded; style long, rather stout, constricted near the distal sixth 

 and seventh, broadly rounded. Type Cecid. ai684a. 



Itonida spiraeina Felt 



1910 Stebbins, F. A. Springfield Mus. Nat. Hist. Bui. 2, p, 35 

 (Cecidomyia lappa) 



191 1 Felt, E. P. Econ. Ent. Jour., 4:555-56 



1918 N. Y. State Mus. Bui. 200, p. 133 



Both sexes of this species were reared April 16, 1910 from a jar 

 containing bud galls on Spiraea salicifolia collected by 

 Cora H. Clarke the preceding season at Magnolia, Mass. A male 

 was also reared June 27, 19 10. This species is closely related to 

 I. apocyni Felt. The male may be distinguished by the 

 fuscous yellowish abdomen with its distal segments deep orange, the 

 distinctly broader wings, the more cylindric distal enlargement of 

 the fifth antennal segment, and the modification of the ventral plate. 



Gall. The gall is simply an enlarged terminal bud about 3 mm in 

 diameter. It was brown in color when collected and approached in 

 general form, the fringed terminal bud gall taken on spiraea in that 

 tpction and was somewhat intermediate in character between this 



