128 NEW YORK STATE MUSEUM 



Lasioptera flavipes Felt 

 1908 Felt, E. P. N. Y. vState Mus. Bui. 124, p. 325 

 This species was taken on white oak at Albany, N. Y., July 1.7, 

 1906. 



Male. Length 2 mm. Antennae dark brown, the basal segments 

 yellowish; 17 segments, the fifth with a length about one-fourth 

 greater than its diameter; terminal segment somewhat produced, 

 narrowly oval. Palpi; the first segment expanding distally and 

 with a length over twice its diameter, the second longer than the 

 first, roundly rectangular, the third presumably a little longer and 

 more slender than the second, the fourth longer and more slender 

 than the third ; face yellowish ; head clothed posteriorly with silvery 

 white scales. Mesonotum shining black, sparsely ornamented with 

 golden scales. Scutellum dark red, postscutellum fuscous. Abdo- 

 men deep red with the basal segment and small subquadrate sub- 

 median spots on the second, third and fourth segments yellowish 

 white, the sixth segment margined basally with reddish and posteri- 

 orly with silvery white, scales. Wings hyaline, costa yellowish brown 

 and dark fuscous, the third vein uniting with the anterior margin 

 just before the basal half. Halteres whitish transparent. Legs mostly 

 pale yellowish, the distal tarsal segments somewhat darker; claws 

 rather long, slender, strongly curved, the basal tooth very long, 

 slender, the pul villi a little longer than the claws. Genitalia ; basal 

 clasp segment long, stout; terminal clasp segment with the basal 

 third swollen; dorsal plate long, broad, deeply and triangularly 

 incised, the lobes narrowly rounded; ventral plate broad, narrowly 

 rounded. Harpes short, stout, tapering; style short, stout. Type 

 Cecid. 612. 



Lasioptera querciflorae Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 325 

 1910 Econ. Ent. Jour., 3:351 



This species was reared from galls on blossoms of oak received 

 June 9, 1882 from Mr H. K. Morrison of Fort Grant, Ariz. A 

 number of flies issued in transit and others continued to appear 

 until June 15th. We are indebted to the courtesy of Doctor Howard 

 and the National Museum for an opportunity of studying this 

 interesting form. 



Female. Length 1.5 mm. Antennae dark brown; 33 segments 

 the fifth with a length about three-quarters its diameter; terminal 

 segment slightly produced, tapering to a broadly rounded apex. 

 Palpi; the first and second segments, indistinct in the preparation, 

 the third with a length four times its diameter, tapering at both 

 extremities, the fourth a little longer and more slender than the 

 third, eyes black. Mesonotum reddish brown, the submedian lines 

 sparsely haired. Scutellum yellowish, postscutellum dark brown. 

 Abdomen reddish brown, the basal segment and ovate submedian 



