I40 NEW YORK STATE MUSEUM 
This light-brown male was reared September 12, 1893 from pods 
of Yucca angustifolia received at the bureau of ento- 
mology, United States Department of Agriculture, Washington, D. C. 
Gall. This species apparently produces no deformity, having been 
reared from Yucca pods. 
Male. Length .75 mm. Antennae about twice the length of the 
body, thickly haired, light brown; fourteen segments, the fifth with 
stems each two and one-half times their diameter; distal enlargement 
pyriform, with a length one-fourth greater than its diameter; ter- 
minal segment, distal enlargement with a length three times its 
diameter, obtuse. Palpi; first segment quadrate, the second with a 
length three times the width, the third and fourth missing. Mesono- 
tum reddish brown. Scutellum light yellowish. Abdomen light 
brown, rather thickly haired; genitalia fuscous. Wings with a 
length two and one-eighth times the width, hyaline, costa dark brown. 
Halteres yellowish transparent. Coxae and base of femora pale 
yellowish, distal portion of femora, tibiae and tarsi light brown; 
claws rather stout, strongly curved, the pulvilli about as long as the 
claws. Genitalia; basal clasp segment slender; terminal clasp 
segment long; dorsal plate probably triangularly emarginate; ventral 
plate long, broadly rounded; style long. Type Cecid. 1017. 
Lestodiplosis sclidaginis Felt 
1908 Felt, E.P. N. Y. State Mus. Bul. 124, p. 409 
1900 Ottawa Nat. 222248 
1918 — N.Y. State Mus. Bul. 200, p. 192 

This species was reared August 20, 1907 in association with Rho - 
palomyia albipennis Felt from a gall collected at Albany. 
It is presumably zoophagous. 
Male. Length 1 mm. Antennae longer than the body, rather 
thickly haired, the basal segment yellowish; fourteen segments, the 
fifth with stems three and one-half and two times their diameters 
respectively; terminal segment, distal enlargement cylindric, with a 
length about three times its diameter and tapering abruptly to a 
narrowly rounded apex. Palpi; first segment short, stout, broadly 
rounded, the second narrowly oval, the third a little longer, more 
slender, the fourth as long as the third; face yellowish. Mesonotum 
fuscous, the submedian lines darker. Scutellum fuscous, postscu- 
tellum a little lighter. Abdomen yellowish, the second and the base 
of the third segments reddish; membrane and pleura yellowish. 
Wings hyaline, costa dark brown, subcosta uniting therewith at 
the basal third; halteres yellowish. Coxae whitish transparent; 
femora yellowish basally, darker apically; tibiae a variable fuscous; 
tarsi with the first segment fuscous, the others lighter; claws slender, 
slightly curved, simple, the pulvilli shorter than the claws. Geni- 
talia; basal clasp segment slender, terminal clasp segment slender, 
slightly swollen basally. Dorsal plate deeply and_ triangularly 
