REPORT OF THE STATE ENTOMOLOGIST I915 I47 



W. Johnson at Philadelphia, Pa., August 14 and 20, 1891; taken 

 at Westville, Conn., by Dr W. E. Britton, September 14, 1904 and 

 reared August 8, 1882 from galls onRudbeckia laciniata 

 and collected by Mr Turner July 31, 1882 at Piney Branch, D. C. 

 Torymus species was reared from this midge. 



Gall. The gall is an irregular, subglobular swelling caused by 

 an abnormal enlargement of the flower heads. It may be 5 cm in 

 diameter and here and there with small leaflets on the surface (plate 

 15, figure 2). A number of larvae occur in a gall. 



Larva. Length 4.5 mm, stout, yellowish; head small. Antennae 

 very short, conical; breastbone (figure 27) quadridentate, the inner 

 teeth rudimentary, widely separated, the other pair large, the anterior 

 chitinous area extending to the cephalic fourth, the shaft irregular, 

 slightly dilating distally and with inconspicuous lateral prolonga- 

 tions at its extremity; the skin minutely papillate and slightly sha- 

 greened; terminal segment with a relatively small, lobulate process 

 posteriorly. 



Exuviae. Length 6 mm, light brown; anterior horns stout; conical, 

 the dorsum of the second or third abdominal segment with a row 

 of stout, evenly placed, chitinous spines and on the distal third and 

 on the basal half two irregular rows of rather heavy, chitinous spines 

 with scatterings, smaller ones anteriorly. Terminal segment with 

 an irregular row of stout spines on the distal third, the lateral and 

 ventral ones stouter and more irregular, the basal half with smaller 

 spines. 



Male. Length 5 mm. Antennae nearly as long as the body, 

 thickly fine haired, dark brown, the basal segment reddish yellow; 

 14 segments, the third with a length about six times its diameter. 

 Palpi; the first segment short, stout, subquadrate, the second more 

 than twice the length of the first, stout, the third about two and 

 one-half times the length of the second, rather slender. Mesonotum 

 slaty brown, the submedian lines broad, dull orange, rather thickly 

 clothed with short setae. Scutellum brownish yellow with a few 

 coarse setae apically, postscutellum yellowish. Abdomen yellowish 

 brown, rather thickly clothed with short, yellowish brown hairs, 

 the pleurae and venter thickly clothed with silvery hairs; genitalia 

 dull orange. Wings hyaline, costa light brown; halteres yellowish 

 basally, a variable fuscous apically. Coxae dull orange; femora and 

 tibiae dark brown and yellowish, the tarsi usually somewhat darker, 

 the posterior legs with the femora and tibiae decidedly lighter and 

 the basal tarsal segments mostly a dull yellowish, the fifth segment 

 a - variable brown; claws long, rather stout, strongly curved, the 

 pul villi as long as the claws. Genitalia; dorsal plate short, stout, 

 broadly and roundly emarginate, the lobes broadly rounded. 



Female. Length 6 mm. Antennae; 14 segments, the third with 

 a length about seven times its diameter. Mesonotum grayish dark 

 brown, the submedian lines rather indistinct, thickly clothed with 

 fine hairs. Scutellum dark brown with a few coarse setae, post- 

 scutellum fuscous yellowish. Abdomen rather thickly clothed with 



