﻿342 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 102 



occiput concave; from in front broader than high, malar space one- 

 third eye, striate, antennae filiform, 14-segmented. Mesosciitum 

 broader than long, coriaceous, almost bare, parapsidal grooves smooth, 

 percurrent, median short, anterior lines sunken. Scutellum pubescent, 

 coriaceous back of the smooth narrow pits, rugose peripherally. 

 Mesopleuron bare and polished. Wing pubescent and ciliate, veins 

 brown, areolet reaching one-fifth way to basal, second abscissa of 

 radius arcuate, radial cell 4 times as long as broad. Tarsal claws 

 simple. Abdomen in side view as high as long, lengths of tergites as 

 50 : 15 : 6 : 5 : 4 : 3, tergites smooth. Ventral spine slender, 8 times as 

 long as broad, shorter than hind metatarsus. Using width of the 

 head as a base, the length of mesonotum ratio is 1.3 ; antenna 2.1 ; wing 

 4.0. Length of four specimens 2,45, 2.25, 2.1 and 2.0 mm. 



Types. — U.S.N.M. No. 60130: Type and one paratype. Paratype 

 also in A.M.N.H. 



Host. — Querent stellata. 



Gall (pi, 16, fig. 10). — Produced on the side of the acorn cup when 

 the latter is about 4 mm. in diameter and dropping off when mature 

 in late Ma}'. Green, 2.5-3.0 mm. in diameter, ribbed like a melon 

 with about 16 grooves, pinkish in the grooves. 



Habitat. — The types emerged April 1, 1950, from galls collected at 

 East Falls Church, Va., on May 29, 1949. The nutritive layer was 

 then about used up and the galls about ready to drop. This isolated 

 tree had been visited almost every spring for many years but these 

 ealls had never been seen there before. 



U S. GOVERNMENT PRINTING OFFICE; 1952 



