322 AMERICAN HYMENOPTERA. 



surprised, some months later, to find in the breeding cage a fine 

 large gall-fly. Owing to my neglect it had been somewhat injured 

 by mites. Species of oak unknown. 



Gall-fly. Male. — Except the dull, opaque, brown antennae the entire insect is 

 black. Antennal joints fifteen, one and two equal, very short, second globular, 

 third one and one-half times as long as the first two, fourth three-fourths as 

 long as the third, fifth aud following scarcely shorter than the fourth. Head 

 small, shining black and corrugated. Thorax roughly ridged longitudinally. 

 Parasides indistinct in the coarse corrugations. Scutellum very short and broad. 

 Two prominent carinas divide its dorsal surface into three equal, coarsely 

 wrinkled parts. Fovae large, round, deep and smooth. Abdomen small, very 

 smooth, first segment (pedicel, ?) very short, second forms five-sixths of the 

 entire length. Wings pale fuscous; veins distinct. Radial area open, short. 

 Areolet small, a dark, brownish red cloud on it and the base of the radial area. 

 Cubitus distinct and reaching to the first transverse. Legs broken. Body .16, 

 antennae .18, wings .17. 



Ampliibolips Gain«*si n. sp. 



Gall perfectly round and smooth, except the point of attachment 

 to the acorn cup on which it grows. The point is small, it projects 

 slightly and turns to one side. The color is pale brown, the outside 

 not different in color or density from the hard cellular matter be- 

 neath. The larval cell is imbedded in, and is adherent to this mass. 

 Size from one half to one inch in diameter. As my galls had win- 

 tered on the tree or lain upon the ground, the color of fresh galls 

 may be different. Like A. prunus Walsh, this species developes on 

 the edge of the acorn cup. It is larger than that species, which is 

 dark and coarsely wrinkled when dry. 



I think this new species grows on a variety of Q. thictoria. 



Gall-fly. Female. — Antennae black, thirteen jointed, the joints moderately cla- 

 vate, second very small and globular, the third equals in length the first and sec- 

 ond together, the fourth is two-thirds as long as the third, the following joints 

 gradually shorter to the thirteenth, which is long and faintly annulate. Head 

 small, black ; vertex coarsely corrugate. Thorax large, rounded, corrugate and 

 microscopically hairy. Parapsides indistinct. Scutellum small, surface same as 

 the ruesouotum ; fovae small, near together, not shining or polished. Abdomen 

 black; first segment one-third the entire length, basal one-half rather densely 

 hairy, remainder beautifully and finely punctate, anterior border of the fifth 

 segment with a few long white hairs. Sheath of the ovipositor with yellowish 

 hairs. Legs small, short and reddish brown. Wings dark, smoky brown ; veins 

 heavy. Radial area open. Areolet small ; veins enclosing it very broad and 

 heavy, a very dark brown cloud on the apical portion of the wing. Body .27, 

 antennae .15, wings .24. 



This fine species was received from President M. R. Gaines, Til- 

 lotson College, Austin, Texas. 



