242 THE CANADIAN ENTOMOLOGIST. 



and separated by two diverging lines of black, extending from the base of 

 the antennae, with an angular patch of brownish pubescence above ; the 

 remainder of the front somewhat opaque, with black hairs ; occiput below 

 with white pubescence and pile, above with grayish pubescence and black 

 hairs ; antenna? black (third joint wanting). Thorax black, with two 

 lateral and two dorsal grayish stripes, the latter dividing the black into 

 three equal areas ; pleura covered with a white pubescence ; scutellum 

 black, with a whitish border, bearing four black bristles. Abdomen 

 black, shining, the posterior angles of the first, second, third and fifth 

 segments with large pollinose spots, having white hairs on all, excepting 

 those on the fifth segment, which has the short black hairs common to the 

 greater portion of the abdomen ; on the first segment the white hairs are 

 particularly prominent and extend over the entire lateral portion ; venter 

 opaque, black, with a white posterior band on the second, third and 

 fourth segments, first, second and third segments whitish pollinose. Legs 

 black, slightly yellowish at the knees and base of the tarsi, the coxae with 

 whitish pubescence ; knobs of the halteres yellow. Wings hyaline, veins 

 and stigma dark brown, bordered by a slight brownish tinge, base of the 

 wing yellowish, tegulae white. Length, i6*/£ mm. 



One specimen from Rouville Co., Province of Quebec, Canada; col- 

 lected by Mr. G. Chagnon. The species is at once recognized by its large 

 size. The specimen before me shows an interesting individual variation; 

 on the right wing the fourth posterior cell is widely open, while on the 

 left wing it is closed. 



Agromyza flaviventris, n. sp. — Head light yellow, occiput black ; 

 antennae yellow, aristae black. Thorax light yellow, with a large black 

 dorsal spot, which extends narrowly from the cervex, expanding dorsally, 

 with lobes above the humeri and base of the wings ; scutellum yellow, 

 metathorax black. Abdomen dull light yellow, terminal segment black ; 

 halteres and legs yellow. Wings grayish hyaline. Length of the larger 

 specimen, 2 mm.; the smaller one, 1^ mm. 



Niagara Falls, N. Y., June 23, 1901. 



