REPORT OF THE STATE ENTOMOLOGIST 1918 139 
1889 Saunders, William Ins. Injur. to Fruits, p. 239 (Diplosis) 
1908 Felt, E.P. N. Y. State Mus. Bul. 124, p. 408 
190A Wess econ. Ent. Jour, 72458 
1918 ————— N. Y. State Mus. Bul. 200, p. 168 
This light-brown midge, reared from Phylloxera vasta- 
trix galls, was recorded as very abundant in the vicinity of London, 
Ontario, in 1882. The larvae and pupae were found in Phylloxera 
galls, which latter were rather common on Clinton and other grape 
vines. The eggs are deposited at or near the entrance to the gall. 
The larva is said to be very active, groping about within the hollow 
of the gall and devouring the young lice. There were no evidences of 
the larvae attacking the parent insects, and there was usually an 
abundance of the young. One or two larvae occur in a gall and in 
no instance were living Phylloxerae found in association with the 
pupae — evidence that this Cecidomyiid is a voracious destroyer of 
this grape pest. 
Male. Length 1.5mm. Antennae nearly twice the length of the 
body, thickly haired, light brown; fourteen segments, the fifth with 
stems each three and one-half times their diameter; distal enlarge- 
ment subglobose, with a length equal to its diameter; terminal 
segment, distal enlargement with a length nearly four times its 
diameter, the apex subacute. Palpi; first segment subquadrate, the 
second with a length three times its diameter, the third and fourth 
nearly equal to the second and more slender. Mesonotum yellowish 
brown. Scutellum and postscutellum lighter. Abdomen light 
brown. Wings with a length two and one-half times the width, 
hyaline, costa light brown. Halteres yellowish transparent. Legs 
pale brown; claws slender, strongly curved, the pulvilli a little 
shorter than the claws. Genitalia; basal clasp segment slender; 
terminal clasp segment long, slender; dorsal plate deeply and tri- 
angularly emarginate, the lobes broadly rounded; ventral plate long, 
broadly rounded; style long. 
Female. Length 2 mm. Antennae nearly as long as the body, 
sparsely haired, pale yellowish; fourteen segments, the fifth with a 
stem one-fourth longer than the cylindric basal enlargement, which 
latter has a length two and one-half times its diameter and is slightly 
constricted near the middle; terminal segment with a length four 
times its diameter, narrowly rounded. Palpi; first segment quad- 
rate, second rectangular, with a length two and one-half times its 
diameter, the third a little longer, more slender, the fourth a little 
longer and more dilated than the third. _Mesonotum a variable 
yellowish dark brown. Scutellum yellowish, postscutellum dark 
brown. Abdomen yellowish brown. Ovipositor short, the terminal 
lobes with a length nearly twice the width, narrowly rounded. Type 
Cecid. 962. 
Lestodiplosis yuccae Felt 
1908 Felt, E. P. N.Y. State Mus. Bul. 124, p. 408 
1918 ——————_ N. Y. State Mus. Bul. 200, p. 27 
