THE CANADIAN ENTOMOLOGIST. 113 



ing ones very short, and all of them of a dull opaque brown ; at the base 

 of the antennse, on the lower side, is a nearly black spot, its edges fading 

 into the prevailing color. The face is hairy ; the mentum smooth, but 

 with a fringe of long stiff hairs on the lower edge. The mandibles are 

 dark, nearly black. The color of the thorax differs considerably in dif- 

 ferent individuals ; in some it is quite black, but in most is more or less 

 clouded with spots of clear shining yellowish brown. The pleurae are 

 black in all my specimens. The parapsidal grooves are large and deep. 

 They start quite near together on the scutellum, and diverge gradually 

 till within a short distance of the collare, when they diverge so suddenly 

 as to form a rather short curve in that part of their course. Scutellum 

 small, finely rugose and hairy, separated from the mesothorax by a broad, 

 smooth band, that can hardly be called a furrow or fovae. Legs clear 

 yellowish brown. Ungues very dark, but not black. Wings hyaline, 

 quite large. Veins rather slender, pale reddish brown. Areolet small. 

 Radial area open, and, by the curvature of the radial vein, broadest in the 

 middle. Abdomen shining black ; ist segment rather large, and with a 

 few short hairs scattered over its anterior half, mostly confined to the 

 sides beneath the wings, remaining segments short and withdrawn (in dry 

 specimens) within the first ; sheath of the ovipositor straight, with mod- 

 erately long hairs towards the point. 



Length — Body .11, antennae .06, wings .14. 

 Described from dry specimens. 



[N0T5;. — When my description of the gall of C. cicatrimla was already 

 in type, I found my specimens of the gall flies were quite unfit for descrip- 

 tion, and the species will be described in a future paper. In answer to 

 some of my friends, who have expressed some surprise that I still retain 

 for all the oak gall insects the old generic name CyjnJ)s, I will say that I 

 intend to publish a complete list of our described species, with their true 

 generic names, in the course of the summer. In this I shall follow Dr. 

 Mayr's classification, adding to his list of American galls such new species 

 as I have not already submitted to him. In my illustrated monograph, on 

 which I am at work, I shall give brief descriptions of all the American 

 species known to me.] 



