THE CANADIAN ENTOMOLOGIST 347 



scutellum than at the collar. Lateral grooves distinct in the black 

 area. Anterior parallel lines very narrow and not sharply defined. 

 Median groove wanting. Scutellum rufous, rugose with two 

 large, somewhat shining basal fovea?. Mesopleura rufous granulate. 

 Metapleura black, smooth and shining. Abdomen globose, smooth 

 and shining, rufous, darker dorsally. Legs rufous, posterior 

 femora darker. Wings hyaline, veins fine. Radial area closed. 

 Cubitus continuous. Areolet small. . Length 2-2.50 mm. 



Gall. — On the trunk of white oak {Quercus alba), May-October. 

 Monothalamous. Green, sometimes tinged with red. Bud-shaped, 

 elongate, pointed at the apex, thin-walled when mature and hol- 

 low inside and containing no separate larval chamber. When 

 young it is more solid. Length .3-4 mm. 



Habitat. — Fort Lee district. New Jersey; Woodlawn, New 

 York City. 



The gall is found on the trunk of large, white oak, where the 

 same is gnarly and young shoots sprout forth. It is imbedded in a 

 cavity and may be easily removed. The gall looks exactly like 

 'the bud of a young sprout, and may be readily mistaken for such 

 and overlooked. I have found fully developed galls May 30th 

 and in June, and also late in October, 191.5. One female emerged 

 in October, 1915, from a gall collected in May, 1915, and one female 

 in May, 1916, from a gall taken in October, 1915. Mr. L. H. Weld 

 has also taken the gall at Evanston, Illinois. The male is unknown. 



Andricus dugesi, sp. nov. 



Female. — Head dark rufous with short, whitish hairs, face and 

 vertex rather coarsely rugose, cheeks finely granulated. An- 

 tennae 14-jpinted, dark rufous. Thorax dark rufous, granulated 

 with coarse, transverve wrinkles, giving the surface a rough ap- 

 pearance. Parapsidal grooves continuous, widely separated at 

 the collar and converging at the scutellum, median groove con- 

 tinuous. Lateral grooves blackish and long. All these grooves 

 are wrinkled. Anterior parallel lines smooth and extending to 

 the middle of the thorax. Scutellum coarsely rugose, rufous with 

 two large, blackish basal fovcce, almost lost in the rugosity of the 

 surface. Pleurae rugose. Abdomen rufous, smooth, with de- 

 cumbent yellowish hairs. Legs rufous. Wings \-eIlowish brown. 



