256 NEW YORK STATE MUSEUM 



broad, deeply and triangularly incised; ventral plate broad at 

 base, tapering, nearly truncate. Harpes long, convolute, narrowly 

 rounded. 



Female. Length 3 mm. Antennae extending to the fourth 

 abdominal segment, sparsely haired, light brown; 18 segments, sub- 

 sessile, the fifth with a length nearly three times its diameter, tapering 

 at both extremities; terminal segment produced, with a length about 

 two and one-half times its diameter, tapering, obtuse, sometimes partly 

 fused with the preceding. Ovipositor about half the length of the 

 abdomen, the terminal lobes long, slender, tapering, narrowly rounded. 

 Other characters practically as in the opposite sex. Type Cecid. 1 003 . 



Rhopalomyia baccharis Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 364, 365 



This form, closely related to the preceding, was reared December 

 17 to 23, 1885, from stem galls on Baccharis pilularis. 



Male. Length 2 mm. Antennae about as long as the body, 

 rather thickly haired, light yellowish brown, presumably 19 seg- 

 ments, the fifth with a stem as long as the basal enlargement, which 

 latter has a length one-half greater than its diameter. Palpi; the 

 first segment rather stout, expanding 

 distally, with a length over two times 

 its diameter, the second longer than 

 the first, tapering from its basal ex- 

 tremity to an acute apex. Mesono- 

 tiim dark reddish brown. Scutellum 

 reddish brown and 3^ellowish, postscu- Fie 6q R h i 



tellum dark brown. Abdomen rather u„„'u^-^ 1 



,1-11 1 . 1 1 ,. 1 1 „,. baccharis; palpus, en- 



thickly haired, reddish brown. Wmgs ^^^ . (original) 

 hyaline, costa yellowish brown. Hal- 



teres yellowish transparent. Legs a variable brown; claws long, 

 slender, strongly curved, the pulvilH longer than the claws. Geni- 

 talia; basal clasp segment short, broad; terminal clasp segment 

 short, stout, tapering; dorsal plate ver}^ short, broadly and trian- 

 gularly emarginate; ventral plate broad at base, tapering, roundly 

 emarginate. Harpes very broad, somewhat convolute, obliquely or 

 roundly truncate, with a chitinous tubercle at the posterior internal 

 angle. 



Female. Length 2.5 mm. Antennae extending to the fourth 

 abdominal segment, sparsely haired, yellowish brown; 19 segments, 

 subsessile, the fifth with a length about three times its diameter, 

 the extremities somewhat rounded; terminal segment with a length 

 about four times its diameter, tapering, subacute. Palpi; the first 

 segment stout, roundly pyriform, the second stout, with a length 

 three times its diameter, obtuse. Ovipositor about one-half the 

 length of the abdomen, the terminal lobes long, slender, tapering, 

 narrowly rounded. Type Cecid. 982. 



