THE CANADIAN ENTOMOLOGIST, 107 



Description : Head black, finely rugose. Ocelli small. Antennae 13- 

 jointed ; ist and 2nd joints short, dusky yellowish brown, remaining ones 

 changing gradually from dull dusky brown to dark opaque brown. Thorax 

 microscopically crackled or striate, the strise apparently transverse, though 

 not so over the whole surface. Parapsidal grooves present, but not as 

 strongly impressed as in most species ; no other lines. Scutellum finely 

 rugose. Fovge wanting. Legs clear yellowish brown, posterior pair much 

 darker, especially the femur. Wings slightly dusky, veins pale slender. 

 Areolet medium size, and bounded by almost transparent veins. Radial 

 area open; cubital vein very slender. Abdomen black; ist segment 

 black and shining, in length equal to all the others taken together. Sheath 

 of the ovipositor short, dusky yellowish brown at the tip. 



Length — body .07, wing .10, antennae .06. 



C. PAPULA, n. sp. 



Clusters of small papillose or cone-like galls on the upper side of the 

 leaves of Q. rubr-a and Q. iindoria^ projecting unequally and usually so 

 crowded as to form a confluent mass of pustule-like elevations. They are 

 very hard, though only transformed portions of the blade of the leaf. On 

 the under side of the leaf they appear simply as a scar, projecting little if 

 at all. They bear a slight resemblance to the galls of C. futiits, but 

 this species is rarely confluent and never beyond two or three galls, while 

 C. papula is quite often found in clusters of forty or fifty, or even a hun- 

 dred. C. papula is monothalamous, while C. futilis has, usually, 

 from three to five larvae in each gall. 



I discovered this species many years ago on a red oak tree near my 

 residence, but the galls were only seen on a single leaf. Soon after I 

 found a leaf or two having these galls upon them — on the same species of 

 oak, twenty miles south of this place (at Derb)', Conn.); and still later 

 found them in considerable numbers on the leaves of (2- tincioria, at Chi- 

 copee, Mass. In this last locality I have observed them for several years, 

 but always confined to a few trees in a very limited area. 



This species ozighi to be found in both sexes, but among the few speci- 

 mens in my collection I cannot discover any males. 



Description : Head dark reddish brown. A few white hairs on the 

 posterior edge of the vertex. OcelH large. Vertex finely punctate. 

 Antennae brownish red, darker towards the extremity; 13-jointed, the last 

 three joints connately joined, and forming a rather heavy club, such as is 



