76 THE CANADIAN ENTOMOLOGIST. 



They are when young entirely covered with a rust colored pubescence 

 which mostly disappears from the outward and exposed surface. This 

 outer portion of the gall is somewhat wrinkled and of a dull reddish 

 brown color. The interior is filled with a soft spongy reddish brown sub- 

 stance which is more dense towards the true base of the gall, and where 

 lies the single larval cell. This cell is not separable from the spongy mass 

 surrounding it. These galls were collected last fall in the northern part 

 of Georgia by Mr. W. H. Patton, from whom I received them. They 

 produce only female gall-flies, which I describe as follows : 



Gall-fly : A very dark reddish brown throughout. The thorax and 

 abdomen almost black. Head — Vertex finely punctate and with a few 

 short yellowish hairs. Surface of the face entirely concealed by the dense 

 covering of short and closely appressed hairs. Antennae a uniform dark 

 reddish brown, 14-jointed ; ist joint club-shaped, 2nd regularly ovate, 3rd 

 one-fourth longer than the two preceding taken togethei", 4th equal in 

 length to the 1st and 2nd together, 5th to loth gradually shorter, nth to 

 14th sub-equal. Surface of the entire thorax concealed by the fine, dense, 

 closely appressed hairiness. Parapsidal grooves — two parallel lines reach- 

 ing half way from the collare to the scutellum, two slightly diverging lines 

 reaching a little more than half way from the scutellum to the collare, and 

 a smooth line over the base of each wing. T^egs of a uniform clear dark 

 reddish brown. Wings large, sulp-hyaline, veins dark brown, very distinct 

 but rather slender. Cubitus very slender and disappearing altogether just 

 before reaching the first transverse, Areolet small but well defined. 

 Radial area open, the longitudinal vein bounding its inner edge consider- 

 ably curved. Abdomen rather small, highly poHshed and shining, ist 

 segment with a tuft of yellowish white hairs beneath the wings. Sheath 

 of the ovipositor (in dry specimens) projecting beyond the abdomen and 

 covered with coarse yellowish hairs. 



Length, body .13, wing .18, antennae .11. 



CVNIPS Q. MAMMULA, n. Sp. 



Galls : Hard woody knots at the base of the young shoots on thrifty 

 young white oak trees, Q. alba. They affect both the lateral and terminal 

 branches, and as they are of a hemispherical form, and of large size when 

 compared with the branch which always grows out of their summit, they 

 suggest the name above given. They are polythalamous, and the larval 

 cells are arranged as though the eggs had been deposited around the bud 



