326 AMERICAN HYMENOPTERA. 



shining. Wings very faintly dusky ; veins strong, very dark and well defined. 

 Areolet subobsolete. Cubitus reaches the first transverse. Radial area open. 

 Vein at its base (second transverse) very dark and thick. Body .06, antennae 

 .06. wings .07. 



Male. — Antennas fourteen jointed. Legs a shade lighter yellowish brown than 

 the female: Otherwise as the female, except the smaller size. Body .05, an- 

 tennae .05, wings .07. 



I may add that my collection contains one branch of potentilla on 

 which I find a gall of the above species and, at the node, one of D. 

 potentillce B. 



Dryophanta discus n. sp. 



Galls. — Among the galls sent me several years ago by Mrs E. 

 H. King, from Napa City, Cal., were a few specimens from which 

 no insects appeared, but from which I removed three dead but per- 

 fectly developed individuals. The galls were circular, flat sessile 

 disks growing in clusters on the under sides of the leaves of some 

 species of oak, closely resembling Q. alba ; but I am not sure this 

 oak grows in that section. The galls are hardly one-eighth of an 

 inch in diameter, and except in size and color might be taken for 

 what is, I think, called the blue spangle gall, not uncommon on the 

 white oak in the Atlantic States. It is smaller and lacks the blue 

 color. 



The shape suggests the trivial name. 



Head black. Antennae thirteen jointed, joints one and two rather large, sub- 

 equal. Third long, fourth two-thirds as long as the third, remainder gradually 

 shorter, all yellowish red. Thorax smooth, shining, with a few scattered hairs 

 and deep parapsidal grooves. Scutellum slightly rugose. Fovae not distinct. 

 Abdomen dark, shining brown. Legs dark brown. Wings rather large ; veins 

 very pale, almost colorless. Areolet wanting. Cubitus nearly obsolete. Radial 

 area open. Body .06, antennae .05, wings .07. 



Three specimens. 



Dryophanta parvula n. sp. 



I found this minute species, of which I have but a single speci- 

 men, ovipositing in the buds of Q. Uicifolia, May 26, 1871. 



Gall-fly. -Entire body black. Head a little broader than the thorax. Antennae 

 thirteen jointed, first joint large, short and dark, second large, globose and equal- 

 ling the first in length, third rather long and slender, remaining joints equal in 

 length, two to eleven yellowish brown, twelve and thirteen dark, dusky brown. 

 Thorax — the two median lines, which extend two thirds the distance from the 

 collare to the scutellum, the parapsides and the lines at the base of each wing are 

 all smooth and shining. The parapsides are not broad, and they converge closely 

 at the scutellum. Scutellum finely wrinkled or rugose. Fovae wanting. Abdo- 



